220 oem piston breakage????

[ek415]

Anyone out there have experience with oem 220 pistons breaking?? How worried should I be about this?? I've got an 02' 220 with a PC pipe and no airbox lid, otherwise stock. It's a ripper with those 2 mods compared to my buddy's stocker, but I'm worried that the additional mid and upper range revs are not healthy for the oem piston??? I've put about 500 miles on it since it left the showroom.

 

[rethnal]

Change it as soon as possible to avoid engine damage due to skirt breakage.

 

[nectar]

...I changed my to weisco this past winter, but it ran with stock piston for a few seasons...I changed it since it was worn past spec., but other than that it looked fine, no cracks, etc....You may want to pull the jug to clean kips and chg. to weisco for peace of mind....Paid like 140.00 frp, piston, bearing, pin, base and head gasket....btw, my mods, fmf pipe/silc.....stock jetting....removed snorkel....

 

[Zerotact]

I am giving it an educated guess, but I'd say that if you were running a stock motor, the stock piston should be fine. But if you have a pipe or other mod, I believe these enable to engine to run in a higher rpm range, for longer durations of time than stock. This  is probably at least part of what causes this problem...

Since you have a pipe on it, I'd say change it!! is it worth saving the money for the $100 piston kit and the $30-40 gasket kit? If the piston grenades itself i can promise you it will cost more.......

 

[clutchcover]

If I am not mistaken, FattyK had his break. Caused something like $1200 in damage.

 

[70 marlin]

I had a wisco blow this spring! Change it and do it offen! the 220 piston was a tough piston @ that time to buy! call jeff fredette he alway's has them in stock, plus every thing else you'll ever need for that 220. 708-946-0999

 

[canyncarvr]

They are known weak spots.

If yours breaks, your 'percentage of the time' is 100%

 

[ek415]

Thanks for the feedback guys. I figured as much and will take the advice sooner rather than later.

 

[Reesknight]

you might want to read this thread :scream:
http://www.dirtrider.net/forums3/showthread.php?s=&threadid=79927