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Author Topic: 2001 CR250 piston replacement suggestions  (Read 99 times)

Offline Action69

2001 CR250 piston replacement suggestions
« on: September 09, 2019, 09:02:48 AM »
Hello as the title states I need to swap out the piston on my 01 cr,I just noticed a crack about 1/2 inch long on the skirt thru the exhaust port.I havenít pulled the cylinder yet to see if itís scored.The bike ran but I bought it in need of some love and havenít ridden it.Ive read mixed opinions about replacing with an Oem piston ,some like wiseco better because itís forged instead of cast.Anyone have any opinions on this?thanks..

Offline atvmxr

Re: 2001 CR250 piston replacement suggestions
« Reply #1 on: September 09, 2019, 10:10:32 AM »
i always use wiseco
Bunch of race quads that run on premix

Offline broken1

Re: 2001 CR250 piston replacement suggestions
« Reply #2 on: September 09, 2019, 10:44:19 AM »
I 2nd that for a Wiseco piston just be sure to let the engine warm up good before going balls to the wall.
overkill is an often underrated achievement

Online Jerry Hall

Re: 2001 CR250 piston replacement suggestions
« Reply #3 on: September 10, 2019, 10:25:01 AM »
Forged pistons will be less prone to crack, but the OEM pistons will  stay tight longer because they do not collapse like the forged pistons and are made of an aluminum alloy that has a higher silicon content.  ANY piston that cracks should have be changed long ago. 
« Last Edit: September 13, 2019, 12:00:33 AM by Jerry Hall »

Offline 2Nubs

Re: 2001 CR250 piston replacement suggestions
« Reply #4 on: September 11, 2019, 04:21:04 PM »
Prefer cast myself, but have had good luck with Wiseco's in the CR's I used to run.
Ď86 330