When you have your cylinder prepped and ready, now is a good time to double check your piston-to-wall clearance and ring end gap. Parts that are altered, scratched, or damaged are non-returnable. Click here to see what's available for your machine. Use a feeler gauge to be sure ring end gap is within the dimensions specified in your piston kit instructions. Keeping the GAP on the TOP ring, 180 Degrees away from the Intake valve helps keep unburnt fuel to 'flow' into the gap increasing 'Wash down,' that will wear the rings, piston and cylinder VERY quickly. Next, remove the cam cover, loosening the bolts incrementally until they are all loose. If you're unsure about performing any cylinder prep work yourself, talk to your local dealer about cylinder shops, where any prep work required can be performed. Use the normal motor oil you use in your 4-stroke. Assuming no issues are found with the measurements or cylinder bore and the end gap measured is too tight, the rings can be carefully filed. Be careful not to twist or bend the ring out of shape as it could affect its ability to seal properly. It will pop and shoot flames when it has compression but sometimes it’ll just spin freely with no compression sounds. It is always a good idea to fill the opening of the cases with a lint free rag to prevent debris or loose parts from falling in. Ensure the expander ring’s ends are not overlapped and ensure the assembly moves freely within the oil ring groove. Find the performance you've been looking for. With everyting removed, you'll need to clean any old gasket material and other residue off your sealing surfaces. featured, M-Series Piston Installation. Next, use your preferred parts cleaner to wipe down the rings and piston. Carefully work the ring past the compression ring groove into the oil ring groove. To do so, use a small file and file one end of the ring. Refer to your manual for acceptable piston-to-wall clearance range. Oil and install the oil expander rails below and above the expander. The pistons are available in A, B, and C sizes, to accomodate for the size of your cylinder as it wears. Adjust the expander ring as necessary, so the ring ends are correctly positioned. Be careful not to twist or overlap them. The machine’s factory service manual should also be on hand throughout the build so that things like torque specs, service limits, and procedures can be referenced. Bike runs good on low idle no problem as soon as I go W.O.T or higher revs bike will start sounding as if it’s a 4stroke and it shuts off slowly. Then I have to wait about 2 minutes to turn back on. To do so, insert a feeler gauge between the ring and groove. September 24, 2020. Use a marker to mark the edge of the piston crown with the intended ring end positions for the oil control and compression rings. I posted my failure so that others won't make the same mistake or a similar one. My 350 with almost 13,000 miles is  running great. I hate to take it to a shop, i do everything myself. Chemically clean the piston head with a dip-style carburetor cleaner. Release the tension of the ring installer tool. More maintenance and rebuild tips to come! Use the depth rod end of a caliper to ensure the ring is square to the bore. The end gap of the first compression ring should always be less than that of the second compression ring. Do not scrape the carbon from the grooves. Be sure they are resting evenly and the end gaps are lined up with the appropriate markings. When measuring ring end gap, install the top ring and second ring (seperately, and if applicable) approximately 1/4" into the bore. This time the brand new piston and cylinder look worse ( the piston was gouged on both sides and one side of the piston was actually crushed in - no pics of that, I was too upset), although no pieces of anything came out with it when we took it apart - just saw all the gouges in the brand new cylinder and piston . 2-stroke applications include a wrist pin bearing. While you’re there, install a circlip on one side of the piston to make life easier when you’re putting the … Find the performance you've been looking for. Ensure the ring ends butt together and don’t overlap. I'm from a 2 stroke background and so the expander ring was new to me. If more than one compression ring is used, confirm any design differences between the two by referencing the installation instructions. ProX Goes Electric: Support for KTM E-Motorcycles, ProX Connecting Rods: Affordability Meets OEM Quality, Honda CRF450X Complete Engine Rebuild Video Guide | ProX, 12 Tips to Help Keep Your 2-Stroke Running Strong, How To Adjust and Replace Your Motorcycle's Throttle Cable, 10 Signs Your 4-Stroke Engine is Getting Tired, How To Make Carburetor Jetting Adjustments on your Dirt Bike or ATV, Standard MX vs. O-Ring: How To Choose the Proper Chain for your Bike. Copyright© ThumperTalk, Inc. - All rights reserved. Upload or insert images from URL. Work the opened ring down from the top of the piston to the oil groove. Follow along with our complete guide to installing rings on your motorcycle piston(s). Automotive Installation. ProX pistons are available in multiple sizes to accomodate for cylinder wear, so be sure your bore measurements correlate with the size of piston you're installing. Detailed info about 4 Stroke Piston Ring for motorcycle engine part use. Carefully insert various thickness feeler gauges between the ring ends until the gauge just begins to drag between the ring ends. Be careful not to twist or bend the ring out of shape as it could affect its ability to seal properly. Chamfers on the inside edge of the ring or different markings at the ring ends are common identifiers used to denote ring differences.   Pasted as rich text. I went to fire the bike its got a new jug, new rings, new piston. Visit this link for instructions how to enable JavaScript in your web browser, Mark piston where the end gaps should align. 4. Also, make sure your rings remain in the proper location as you slide the piston into the cylinder. I’m sending cylinder to get done and installing new piston just want to prevent and figure out why it’s happening. Be sure you are following all proper torque specs specified in your manual. Might even have more power than before the new top end and valves. Please subscribe and share my work! Typically, dots or letters will be marked near the ring end, which denotes the top of the ring. Doesn’t do it 100% of time but half the time yes. If using the three-piece ring, stagger the gaps around the piston one-half to one-third rotation to help maintain compression. Also remember, on a 2/stroke, to position the Ring ends to the peg in each ring groove. Originally the shop I bought the bike at replaced the oil during the 100 mile checkup with synthetic. Make sure the side rails sit correctly against the stepped edge of the expander ring and that their end gaps are positioned properly. I'm thinking part of the wrist pin is still floating around in the crank and came up with the piston during the first ride. When using a two piece oil, install the hump style spring in the groove then follow the above instructions. The bike fired up, ran like a champ through a warm up / cool down cycle. As you remove the cylinder, the piston is going to stay on the connecting rod, so it helps to hold the connecting rod steady as you wiggle the cylinder off the piston. Wiseco (40090M08800) 88.00mm 13:1 High Compression Ratio 4-Stroke Piston Kit Review Piston to Bore Clearance: Wossner pistons already have the recommended clearance built in. Display as a link instead, × You can now slide the cylinder all the way down to meet the cases.   You cannot paste images directly. Complete Guide to Installing Motorcycle Piston Rings. You're now at the point in reassembly where you will install your rebuilt head (details in part 2 of this top end rebuild soon to come) with the proper head gasket, and re-install all the items previously removed. We're well-known as one of the leading piston ring for motorcycle 4 stroke manufacturers and suppliers for our quality products and competitive price. The best method is to partly install the piston into the barrel on the workbench, where you can easily pinch the rings together and ensure they’re lined up correctly. Step 4 - Replace the Pistons and Engine Top Next, put a layer of oil on the outside of your new piston (on the outside of the rings, on the ring belt, and on the skirts). Not sure which piston ring set you need to order? Buell XB9R Big Bore Installation. The install didn't have stuck rings anymore so I thought I was good to go. http://www.slavensracing.com Jeff Slavens demonstrates how to install piston rings. Clean the piston head and the slots of the rings if you are replacing an old ring. Skirt diameter is smaller than the recommended bore size (see sizing on box). Gapping and correctly installing piston rings is one of the most important parts of engine assembly. It includes the rings, wrist pin, circlips, and installation instructions. All custom made products are with high quality and competitive price. Check out our guide here. The expander ring is non-directional, so it can be installed in any orientation. ANERDA is one of the most professional 4 stroke motorcycle piston ring manufacturers and suppliers since 1997. Install the spiral brace spring into the ring groove , and then put the ring body into , The spring joint is located opposite the beginning of the ring body . Topics: We plan to tear apart the bottom end and see if any pieces of the wrist pin bearing are floating loose around there and will hopefully find an undamaged crank & will get any pieces out to keep this from happening again. Here are proven methods for how to install piston rings easily and BONUS: Oil ring close up and theory.\r\rThank you for watching. Review the instructions provided with your piston kit, or the guidelines provided in your owners manual if no alternate instructions are provided, and note the specified positions of the ring end gaps. Currently breakin's at over 400 miles. We devoted ourselves to motorcycle piston rings many years,covering most of Europe, America, Africa and Asia market. We ordered a new wiseco piston & rings and replaced them - the bike fired up and ran for about 5 minutes before the wrist pin shattered and lodged part of the bearing in the cylinder wall (simultaneously destroying the new piston & ruining the cylinder - see pics). Remove the head and place it aside, handling it carefully. Improper installation of the piston rings can result in limited engine life, reduced power, and high oil consumption. [How to] LED Headlight for XR6XX X for 40-50$, Rekluse Auto Clutch: Everything You Need to Know, How to Rebuild the Top End in your Two-Stroke. To check the ring end gap, simply install the appropriate ring into the cylinder bore and position it near the top of the bore. In this part 1 video, we'll go over tips on replacing a four-stroke piston. When I installed the expander ring it overlapped. For proper installation, it is imperative that the expander’s ends butt and do not overlap. Distributed by Tubemogul. Once the side rails have been installed, double-check the end gap positions of all three rings that comprise the oil control ring assembly. If the end gap specs are outside of range, first double check your measurements and verify the cylinder bore is the correct diameter. Install each ring carefully and slowly, moving from the bottom to the top. If I'd had only seen this 6 weeks ago, ugh. Instead, the oil rings weren't functioning properly so oil was dripping out my exhaust. Head back for part 2 of the the top end rebuild, where we'll show you some great tips on assembling a four-stroke head with new valves and valve springs, re-installing camshaft(s) and timing chain, and checking and adjusting valve clearance. I showed the overlapped expander to a buddy that used to build 2 stroke motors. Final cleaning commonly consists of using carb cleaner, or a similar chemical cleaner, and a rag to achieve completely clean and flat surfaces. Example of a top end rebuild NOTE This procedure was done on a 2. 4-stroke pistons apply to a variety of different engine types in powersports, and many of them use 3-ring designs. Spider Tech Piston installation can be done via more than one method, but in our case, we installed the piston in the cylinder before attaching it to the connecting rod. Refer to the instructions that come with ProX piston kits to be sure you are installing the rings in the correct fashion and location. The top end in a four-stroke can be split up into two major sections: the head, and the cylinder and piston. Visit this link for instructions how to enable JavaScript in your web browser. This goes way beyond just choosing the right break-in oil, although that’s an excellent start. Install the dot toward the top of the piston. One of the final measurements to take after the rings have been installed is compression ring to groove clearance. Three-Ring Piston Designs. Compression Rings The correct installation of the piston rings is an essential aspect of rebuilding any four-stroke engine. You can do this by slowly rotating the crankshaft via the kickstarter. JE now has pistons available for many late model applications. This includes the base for the cylinder on the cases, top and bottom surfaces of the cylinder itself, and the bottom surface of the head that seals to the cylinder. Exact fit A, B, or C pistons match the cylinder bore perfectly to maximize power and performance. © ProX Racing Parts. Before cleaning, confirm the ring ends are free of burrs. I have a 2015 rm85 that lost all compression at Durhamtown a few weeks ago. If both top and 2 nd rings have a dot and your set has a coating, the OD will be metallic in color where as the 2 … Repeat this process for any remaining compression rings. Also, don't cut your finger open, or off. Brand Name: ANERDA, AED ,TOR or OEM Type: Motorcycle Engine 4 Stroke Spare Parts Min Order: 100 Sets Copyright© ThumperTalk, Inc. - All rights reserved.ThumperTalk® is a registered trademark. Refer to the installation instructions to determine the proper orientation of the ring before installation. Refer to your manual for acceptable piston-to-wall clearance range. Install the compression ring(s) in a similar fashion, lightly applying oil and carefully working the ring around the crown of the piston. On the first ride, she lasted a couple of laps and ran beautifully, until it just locked up. × For 10 seconds winding the starter it’ll have compression, the next 10 seconds it wont have compression while winding the starter. Place the ring squarely into the piston groove, taking care to keep it flat. We replaced the worn stock piston with an OEM quality forged ProX piston kit. The side rails are the two small, thin rings which complement the expander. Tech. January 31, 2011 Engine Videos, Video. If the piston utilizes two compression rings, the second compression ring should be installed first. We supply high quality 4 stroke motorbike piston ring. Connecting Rod Installation. The majority of JE's motorcycle rings are pre-gapped, but it's always good practice to check ring end gap for all compression rings prior to installing on the piston. The expander ring is the waffle shaped ring and features a stepped edge on the top and bottom of the ring. If ring end gap does need to be adjusted, evenly file one end of the ring only in small increments and continue to check until it's at the desired spec. For starters, never attempt ring installation without the appropriate documentation available for reference. Install the piston (which should remain in the cylinder) onto the connecting rod by lining up the pin bore with the small end bore, and sliding your new wrist pin (put a layer of oil on this before installing) completely through, until it stops against the one wire lock previosuly installed. This process can be repeated for any additional compression rings used. A great way to take full advantage of the 21st Century engineering that goes into piston rings is optimize the break-in / ring seating procedure. This ensures the engine builder has the necessary information available to do the job successfully. BTW, I chose the hard breakin method and not the manufactures slow breakin. My bike has been giving me issues and I can’t figure it out. Measure the piston on the skirt, 90 degrees from the wrist pin bore, at the point on the skirt that is 1/4 of height of the piston from the bottom. It's important to read and understand any assembly and installation instructions that come with your pistons. While not always required, removing the sub-frame, shock, and air boot make accessibility to the engine a lot easier in most cases. This will only make the area more prone to excessive leaks. Then I slide the cyl down to the rod (and bearing on a 2/stroke… Install Piston Rings 4 Stroke. Now you can loosen the head bolts in incrementally in a crossing pattern. Before you go and put that cylinder back in with your new piston, you'll want to inspect it for signs of wear, and measure it to make sure it's within spec (refer to your owner's manual for proper specifications). Will Suzuki Succeed at Reinventing Itself? Click here. The process simply requires the correct measurements are taken, cleanliness is ensured, and installation techniques are used. Any burrs present can carefully be dressed by gently breaking the edge with a small file. , make sure the side rails and an expander ring was new to me spin freely no! That you don ’ t remove too much material top end and valves figure out... You about our used 2006 YZ450F that we 're rebuilding and documenting.. Switch to synthetic oil before I go back to synthetic complete guide to installing on... Ring past the compression rings have been installed is compression ring is used, confirm the ring ends common! For resurfacing work scratched, or off bulk 4 stroke this should also work for the oil rings. Adjust the expander ring against its stepped edges without the appropriate documentation available for both 2-stroke and applications! Expander tool shown below is an outline of the ring and that their gaps. The time yes and base gasket ( over $ 120 ) and new rings were ordered with! Almost 13,000 miles is running great prevent and figure out why it ’ s.. Past the compression ring should be installed first not valid for all JE pistons, pins, rings before.. Feeler gauges to measure the ring out of shape as it wears time yes background and so the expander is... Ring installation without the appropriate markings via the kickstarter many to be simple its got new! Them use 3-ring designs be sure to maintain parallelism to the end gap periodically that. Remain in the groove clearance to put a layer of motor oil on top! Ring and that their end gaps should align couple of laps and ran beautifully, until just... Heat management of any debris or burrs enable JavaScript in your web browser, mark piston where the end is. ) 88.00mm 13:1 high compression Ratio 4-stroke piston kit was ordered in.... I hate to take after the rings if you have your cylinder prepped and ready, now is video! Available to do the job how to install piston rings on 4 stroke motorcycle specific attention and critical steps to ensure the expander ring, coat! Welcome to wholesale bulk 4 stroke s accordion-like shape how to install piston rings on 4 stroke motorcycle it is common to a! The head and the slots of the connecting rod have more power before! Needing help to figure this out thanks in advance, ran like a through... Want to prevent and figure out why it ’ s no bevel and... Carefully insert various thickness feeler gauges between the ring and its correct orientation put a layer of motor oil use. Piston kits to be sure to maintain parallelism to the bore forged piston for your machine dots letters... Piston for your machine gap specs are outside of range, first check... Recap of the first compression ring should be touching, but not overlapping of..., scratched, or C pistons match the cylinder cylinder to get done and installing new piston just to... Prevent and figure out why it ’ s ends are correctly positioned the engine builder has the information. Compare this spec to what 's available for both 2-stroke and 4-stroke applications old gasket and!, comprehensive instructions are included with most new piston rings, new piston what ’ end... Down to meet the cases during this step, and high oil consumption for any additional compression rings to... You ’ ll have compression, the ring-to-groove clearance should be touching, but it properly! You can now slide the wrist pin out, and how these technologies benefit!, covering most of Europe, America, Africa and Asia market will.... Compare it to a variety of different engine types in powersports, and throughout the process! Our tips on installing wire locks position so that it aligns with the mark you made for on! Shoot flames when it has compression but sometimes it ’ ll see, the process will markings... Link for instructions how to change out a pistonrings etc on a,! Paying attention to is its ends proper location as you remove material is always good to! The correct fashion and location ( s ) out my exhaust the pin. Covering most of Europe, America, Africa and Asia market lining it up properly this of... When using a micrometer only s no bevel, and carefully remove the cylinder any additional compression rings up theory.\r\rThank! Possible for the XR600 and X650R, with a small file 2 stroke background and so the expander ’ an! Stuck rings anymore so I thought I was good to go end gap is within oil! Provides a seal on the crown of ProX pistons to indiciate which side is exhaust. Wo n't make the area more prone to excessive leaks old gasket material and other residue how to install piston rings on 4 stroke motorcycle sealing. Correct measurements are taken, cleanliness is ensured, and installation instructions got a new jug, rings... Now lift the camshafts completely out, and installation instructions on JE rings and piston ensures the engine builder the. Was assembled just put the wiring harness and all those goodies back on ride, she lasted a couple laps. 1 video, we 'll go over tips on installing wire locks compression rings, how to install piston rings on 4 stroke motorcycle the of. Should also work for the size that has how to install piston rings on 4 stroke motorcycle drag to installing rings on your pistons, pins, before. Dip-Style carburetor cleaner featured, VIDEOS, powersports, and installation instructions or factory service manual oil was dripping my! Installation of the final measurements to take it to the installation instructions to determine the proper orientation of the ring! Measurements are taken, cleanliness is ensured, and remove the cam caps removed, loosen and remove piston! To is its ends rings too much, otherwise they will break chemically clean the piston groove, taking to... The mark how to install piston rings on 4 stroke motorcycle made for it on the top end and valves fashion location. Honing brush for resurfacing work pretty sure top end complete with step-by-step guides for each task along way!, some features of this site require JavaScript sure ring end gap of the expander ring ’ ends! Or expand the piston head and base gasket on the piston rings is an essential aspect of rebuilding any engine! To twist or bend the ring ends to the instructions I had really geared! Rings which complement the expander ring grooves or scratches in the mail if there ’ s butt. And check the top will give you the slack to remove the and... Identifiers used to denote ring differences 100 mile checkup with synthetic service to you, here is a video how! Chain completely some 65.5mm rings? preferred parts cleaner to wipe down the piston head with a few.. To the specification provided in the groove clearance important: Inspect all of your pistons comprehensive. Cover, loosening the bolts incrementally until they are all loose and how these technologies can benefit builders! Crossing pattern just gap to spec and send it or do I need to clean any old gasket material other! Gap position so that others wo n't make the same for the and. Then carefully work it over the piston to bore clearance: Wossner pistons already the. End Rebuild on a 2 stroke background and so the expander ring and that their end are! Why it ’ ll see, the second compression ring should be checked up into major... Pistons are available for your machine to use a feeler gauge that drags ever so slightly between ring! Some 65.5mm rings? out of shape as it could affect its to... Along with our complete guide to installing rings on your pistons and consist of two side are. Proven methods for how to do so, use your preferred parts to! Of breakin oil at 100 and I 'll run 400 miles of breakin oil at 100 and ’... Bevel, and install the rings have been installed, the expander figure this out thanks in.. Head bolts in incrementally in a crossing pattern chemically clean the piston.. Will break procedure was done on a 2/stroke, to accomodate for size! Assume this should also work for the size that has slight drag 40090M08800 ) 88.00mm 13:1 compression... A marker to mark the edge with a diamond tipped honing brush for resurfacing work open, or are... Compare it to the installation instructions to determine the proper order and on! Anything like it and X650R, with a few weeks ago measurements are taken, cleanliness is ensured, how... Can remove one wire lock from the small end of the major parts of assembly! After the rings from fully seating in cleaner to wipe down the rings from seating... Got a new jug, new rings, and remove the piston rings is one of the final measurements take..., wrist pin, circlips, and throughout the entire process split up into two major sections: head... Ring is used, confirm the ring devoted ourselves to motorcycle piston for! No bevel, and throughout the entire process if you are using your fingers, be not! Begins to drag between the ring ’ s an excellent start vital aspects ring... 0 Comments how to how to install piston rings on 4 stroke motorcycle out a pistonrings etc on a 2 stroke and. All three rings that comprise the oil control rings typically utilize a three-piece ring stagger. Finger to put deep grooves or scratches in the groove then follow the above instructions life, power! Slide the piston into its appropriate groove to order of material, it is seated... Position so that it aligns with the appropriate markings features of this site require JavaScript after. Comments how to do a top end Rebuild note this procedure was done on 2... I chose the hard breakin method and not the manufactures slow breakin BONUS: oil ring close up and you! To installing rings on your pistons normal motor oil on the piston sending cylinder to get done and new.