4 stroke top end replacement.

mx510
Profile picture for user mx510
Posts
1992
Joined
2/26/2011
Location
Gig Harbor, WA, USA
mx510
Edited Date/Time 1/27/2012 9:46am
I am going to be rebuilding my RMZ 450 here soon. I am curious what pistons people have used and what kind of luck they have had with them. As of right now I am leaning towards OEM but not sure. I have heard good things about the CP pistons, and bad things about the Wiseco. So if you guys could shed some light it would be much appreciated.
|
Yamaharider1474 9/22/2011 12:15pm
9/22/2011 12:15pm
i have a 2005 RMZ 450 and used a JE piston and have been using it for the past 75hr with out issues.
mxtech1
Profile picture for user mxtech1
Posts
1968
Joined
7/21/2011
Location
Galesburg, IL, USA
mxtech1 9/23/2011 6:18am
9/23/2011 6:18am
I have used all of the large companies pistons and have good results. I have no bad experiences with Wiseco and no failed engines due to a piston failure pre-maturely. CP pistons are nice and i have been using them alot in my mod engines. you can't ever go wrong with OEM.

JE pistons are extremely nice and probably my preference. They also supply the pistons for Pro Circuit and Moose Racing. If you order a higer compression Moose Racing piston, it will have JE badging on it but should be cheaper than a pro circuit or JE because Moose doesn't have inflated costs from marketing.
mxer757
Profile picture for user mxer757
Posts
1
Joined
9/29/2011
Location
Lacey, WA, USA
mxer757 9/29/2011 11:29pm
9/29/2011 11:29pm
I ran a JE with 13.5:1 compression ratio in my 07 RMZ 450. It ran well and I had no problems.
MOTODAD422
Profile picture for user MOTODAD422
Posts
429
Joined
9/26/2008
Location
Easton, PA, USA
MOTODAD422 9/30/2011 12:03am
9/30/2011 12:03am
I always had good luck with Vertex pistons,they also come in A,B,C sizing. with B&C being ever so slightly larger than A and C a little bigger yet, so can get your piston to cylinder clearance as close as possible to optimum.

Post a reply to: 4 stroke top end replacement.