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Found 179 results

  1. Ben99

    Kawasaki KX125 (1986)

    0 comments

    Awesome bike! Rips up the dirt
  2. 2 reviews

    XC Rings - Replacement Rings Sold per cylinder Wiseco rings fit Wiseco pistons only For +.010 oversized pistons
  3. 10 reviews

    All pistons are heat treated with a T-5 hardening and tempering cycle All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life Cast piston kits are gravity cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston Forged pistons are forged from 2618 aluminum for superior strength and durability Forged High Compression pistons improve power and torque across entire rpm range Big Bore pistons increase engines displacement, torque, and peak horsepower Forged Replica pistons are forged OE replacements Replica pistons and all rings are OEM replacements Kits include piston, rings, wrist pin and circlips Replacement two-stroke piston rings sold individually; four-stroke piston rings sold as a set
  4. 0 comments

    Its a 10 year old motocross bike, with very low hours. Perfect for an Enduro conversion. This bike astounds me. One day I'm riding MX on a track, the next I'm riding in the desert on single track. Its unstoppable, and just so easy and forgiving. I love this bike.
  5. 0 comments

    I love it,I'm try in to build it as far as I can in performance, I'm using Kimble white valve guides and valves I have an aftermarket Norris 340 cam,cobra header n pipe, I'm trying to find the rare 2 plug TC head for 200x , I want to use vintage 80s performance parts , good used,NOS,and I'm gonna combined new ignition tech........I'll add more with process I just strip her back down to paint I'm gonna take pics from how it sits to a finished minster, YES Nitrous is on the list or a turbo charger........I'll update with painting frame etc etc
  6. 0 comments

    Love it, it gave me some problems before the rebuild but now it's better than ever. Big bore gives it crazy bottom end and the cam makes up for that loss off the top. Awesome bike all around.
  7. 0 comments

    2004 Yamaha YZ 450f - New Wiseco Top End kit installed with factory comp. piston, Renthal Twinwalls, ZipTy Racing Racing Coolant, R&D Powerbowl 1, Carb O-Ring Mod, PG Racing Graphics Wanted to add 2006-2009 Yamaha YZ 450f SSS Front fork tubes and matching rear suspension
  8. 3 reviews

    GENERAL INFORMATION We are proud to distribute the German made Wossner line of pistons. Wossner quality is well known around the world. All Wossner pistons feature forged construction with fully coated teflon skirts and optimized design for light weight and strength. If the piston you need is not listed please contact us as we distribute the entire Wossner product line.
  9. 0 comments

    Plenty of power. Outdated suspension that feels uneasy and wild. Not confidence inspiring.
  10. 0 comments

    Its a great bike. But I decided to do a full restore. Ill have it finished in a couple weeks!
  11. 0 comments

    I love this bike,I purchased it in 2008,It was a basket case motor was blown.I have been building bike motors for over 27 years.So I went to work,Punched it out to 101mm used wiseco 11:1 high compression piston,Installed a Stage 2 Hot cam for a XR650,It took some time to figure out how to pull it off,I added new FMF exhaust system for XR650L.It starts on 2 or 3 kick.I had to rejet the carbs,I am running 137.5 main jet.With the power it is making I went with Barnnet Dirt digger clutch.I cant say any thing bad about.I ride it on the trails and the street.I didn't get the bike finished until this spring.So I have only put 1200 miles on it.
  12. 0 comments

    Still one of my favorites, hence why I still have it.
  13. 0 comments

    Entirely too fun. This is the only mx bike I have owned and it has way more power than I will ever need. It's very stable at high speed, can be lugged without fear of stalling, and punches in every rpm range. Cons? It overheats pretty quickly in off-road settings, has a hard time leaning in turns, and can be difficult to handle. Still, I give it a 5 outta 5.
  14. 0 comments

    I love it. I can beat 250f's all day with it. These bikes are awesome stock but when you mod them they are even more fun!don't listen to anyone who says a 125 can't beat a 250f. They can! I raced open C on my 125 against 14 250fs and i got 5th over all these 125s haul ass!
  15. First time post but I read ThumperTalk a lot. Just got this 2002 YZ125 after not riding for 10 yrs. I'm 28 now. Drove 2 hrs to get the bike, the guy asks me to text him 30 mins before I get there. When I do he mentions the bike wont start but he rode it yesterday. Apologizes. I get there and talked him down to $1100 since I can't hear it run and drove all that way. Get it home and put in new piston and rings and replace crank seals since there was oil in the cylinder. Also replaced the silencer packing as it was drenched in oil. Let it warm and cool three times. Not even 10 mins on the first real ride the ring gets stuck on the exhaust side. Check the jetting to see if it was too lean and realize it's a 1998 carb in a 2002 bike. The previous owner put 2002 jets in it. Put the correct jets for a 98 in it with a new piston and ring and the ring gets stuck again. Then I notice the bridge where the power valve is has no plating on it. Explains the piston problem. Had a 2001 cylinder from back when I used to race. Got a new piston and ring and put it on but realized they changed the power valve design. The old design fit in the new cylinder so I put them in. Made sure the timing was 20 thousandths below top dead center. Ran it and blew a hole in the piston within 5 minutes. Figured the old style valves weren't sealing right so I ordered some 2003 valves off eBay. Put them on and did a leak down test. The valves leaked so I plugged the hose and with 7 psi found a leak at the crank seal on the timing side. After running the numbers I figured out the case is a 1998 model, carburator is a 1998 model, frame and suspension is 2002, cylinder is now a 2001 model with 2003 power valves. The previous owner had a 2002 crank in it because the 1998 seals I ordered wouldn't fit and the 2002 seals I ordered when I first got the bike did. Then I notice after splitting the case to clean the parts of the piston out they must have grinded on the crankshaft where the seals go. Could a small leak where they made the shaft not a perfect circle cause this type of damage that quick? This is my last theory. I've only had the bike 1 1/2 months and spent over $1500 on parts after buying the bike for $1100. Any help is appreciated, I just want to ride.
  16. So rebuild time is upon me on my 2013 kx 250f. This is my first rebuild and was wondering what pistons you would recommend? I race top C class motocross. What pistons have been reliable, better performance ect? Thanks, Dan
  17. Hello, I'm looking at buying a 2008 wr450f from a friend of mine but first I have a question about it. I'm wondering about the maintenance on these bikes. I know the newer generation four strokes aren't reliable like the old xrs. I ride trails in which some are open, and I do a lot of messing around such as racing friends and hill climbs, ect. In which I rev the bike out, but keep up on maintenance at the same time. On average how many hours do you guys get out of a piston and rings on these bikes? Any advice, suggestions, ect is appreciated! Thanks.
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