Check out this big MOFO

Check out the difference in size of this PSI 425 piston over a stock 250R piston,,,,,,that's crazy.....looks like it came out of my truck...

[trx400ex]

thats a big piston ya got there, are they both yours?,,,,,your sellin your 400 and buyin a 250r on us arent you rico? huh? huh? i thought you wanted a 416 since the 420 goin to thin on the sleeve

That picture is a 250r stock piston on the bottom and a PSI 425 kit for the 250r piston on top. I'm goin with the 416 still,,actually I ordered it Tuesday so it should be here today or tomorrow...I guess after my race next weekend the motor will be coming apart, hopefully it will be ready for the next race at podium 1 in charlestown, IN. on Nov. 11th.

[51]

dude i know it is nutz..when i exploded my 426 and i send it to tc i got it back with the piston installed in the cyl..i measured the new one and it is 1/4" bigger than the 426 piston...it is really crazy now...

Chef isn't that what you have in your quad Blue and white TT quad????

Old post huh???:huh

[Kilabanshee]

Yeah Iam pretty sure chef has a 425, Damn that really is a huge difference in size.

[F-16Guy]

That piston is going in a big bore "R"? Damn, that thing is huge! I'd like to take that for a spin.

[RAPTORAZ]

If you think that 88mm 425 piston looks huge, you ought to see the 105mm 727 piston in my Raptor. At a little over 4 inches in diameter, it looks like it came right out of a big block.