Is this piston still useable or is it fucked. What type of piston should I buy

Is this piston still useable, or is it fucked? What type of piston should I buy (cheap, but with quality) ?

10 comments
  • Is it corroded or damaged.me personally Cus I'm fussy any niggle with cylinder or piston I rebuild top end expensive but worth it tbh Iv got a 98 yz250 only done 2 cylinder replacements as never liked the idea of rebore or sleeves but each to there own I suppose

  • For the info of every member here, Roland Cannon is the reputed moderator of Thumpertalk's Yamaha 2-stroke section ;)

    If you have questions, it is always better to tap his advice, knowledge and wisdom :D

  • If that is corrosion tho use bit of 800/1000 grit wet and dry lightly run over it if it is damaged replace it m8 tbh

  • It's is detonation.

  • Gene Kapica Sr.

  • Yea you can see the detonation signs on the head.

  • 7:00 to 10:00

  • I remember on thumper talk a good discussion about this. Could be low octane gas among other things like spark,cooling or timing.

  • I remember on thumper talk a good discussion about this. Could be low octane gas among other things like spark,cooling or timing.

  • Also could have been caused by previous owner depending on how long you have had bike. Just keep this in mind.