Piston change interval

1 reply to this topic
  • jcross312

Posted December 28, 2015 - 04:07 PM


Hello everybody, trying to garner piston change information for my new '16 yz450. I'm up to 22 hours now and the bike is running great. Strong motor on this bike. I want to keep the bike in good condition and well maintained, but don't want to do unnecessary maintenance either. I've been researching and get mixed opinions about piston change intervals. Im a solid B rider. Strictly motocross. 90% practice, 10% race. Im guessing I could go 50 hours or more. Some reports swear nothing is wrong with them at 100 hours. What do you guys think?

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • luckyguy19

Posted January 03, 2016 - 07:36 AM


I race Pro-Am desert and went 110 hours on my piston.  Everything looked great in the engine when changing out the piston.  I can tell you that I was loosing compression.  After the replacement the bike feels tight again and has that snap off the bottom.  I would not go as long next time, maybe 75 hours.  I've used nothing but Castrol Racing 4t since new and I'm anal about changing the oil and air filters.  

Related Content


Thinking about Yamaha 250... by Arctic Pride

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies

Megabomb Fitment by 288yz450

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply

Is it worth it? (Cam and High compression piston) by macgi77

Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies

Wilson the Blue Privateer by jetfuel

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  50 replies

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.