Top end rebuild

Got questions? We got answers....
Post Reply
Trails Boy
Member
Posts: 35
Joined: 10:51 pm Apr 21 2012
Country:
Location: Princeton Texas (near Dallas)

Top end rebuild

Post by Trails Boy »

So i went to have my cylinder measured and it came out at 66.03mm and was told i need a 65.98mm piston... Problem is I've only been successful in finding one that size on ebay (new) made by pro-x specified for a crf-150 would that work? If not Wiesco makes a 66mm piston... Would that work?
User avatar
Julien D
KDXRider.net
KDXRider.net
Posts: 5858
Joined: 07:53 pm Nov 07 2008
Country: USA
Contact:

Top end rebuild

Post by Julien D »

Is this the 87? If so, that is within factory spec. You can put a std wiseco in it and be fine, or a pro-x b/c/d.
Image
User avatar
rbates9
Supporting Member II
Supporting Member II
Posts: 3164
Joined: 06:07 pm Apr 27 2010
Country:
Location: UPSTATE New York

Top end rebuild

Post by rbates9 »

A four stroke piston won't work in a two stroke.
Trails Boy
Member
Posts: 35
Joined: 10:51 pm Apr 21 2012
Country:
Location: Princeton Texas (near Dallas)

Top end rebuild

Post by Trails Boy »

Yes its the 87. So your saying the pro-x that i sa on ebay will work?
User avatar
Julien D
KDXRider.net
KDXRider.net
Posts: 5858
Joined: 07:53 pm Nov 07 2008
Country: USA
Contact:

Top end rebuild

Post by Julien D »

Trails Boy wrote:Yes its the 87. So your saying the pro-x that i sa on ebay will work?
If it's a STD piston, it will work.
Image
Trails Boy
Member
Posts: 35
Joined: 10:51 pm Apr 21 2012
Country:
Location: Princeton Texas (near Dallas)

Top end rebuild

Post by Trails Boy »

How do I know if its a STD piston?
User avatar
Julien D
KDXRider.net
KDXRider.net
Posts: 5858
Joined: 07:53 pm Nov 07 2008
Country: USA
Contact:

Re: Top end rebuild

Post by Julien D »

The listing should say if its standard or oversized.
Image
Trails Boy
Member
Posts: 35
Joined: 10:51 pm Apr 21 2012
Country:
Location: Princeton Texas (near Dallas)

Top end rebuild

Post by Trails Boy »

It does not say Guess I will need to keep looking :sad:
User avatar
Julien D
KDXRider.net
KDXRider.net
Posts: 5858
Joined: 07:53 pm Nov 07 2008
Country: USA
Contact:

Re: Top end rebuild

Post by Julien D »

Link?
Image
Trails Boy
Member
Posts: 35
Joined: 10:51 pm Apr 21 2012
Country:
Location: Princeton Texas (near Dallas)

Top end rebuild

Post by Trails Boy »

david
Member
Posts: 524
Joined: 08:30 pm Oct 10 2011
Country:
Location: Forney, TX

Top end rebuild

Post by david »

Instead of searching for that size piston, search for one for your spacific bike.
'81 KDX 175
'90 KDX 200
'07 Vulcan 2000 Classic LT (totaled 4/25/15)
'82 Honda GL500 (sold)
'96 ZXi 1100 JetSki
'98 STX 1100 JetSki
User avatar
Julien D
KDXRider.net
KDXRider.net
Posts: 5858
Joined: 07:53 pm Nov 07 2008
Country: USA
Contact:

Re: Top end rebuild

Post by Julien D »

david wrote:Instead of searching for that size piston, search for one for your spacific bike.
Exactly. You just need a standard KDX200 piston. Same part from 86 and up I believe.
Image
Trails Boy
Member
Posts: 35
Joined: 10:51 pm Apr 21 2012
Country:
Location: Princeton Texas (near Dallas)

Top end rebuild

Post by Trails Boy »

Okay! That helps so much! Thanks! :supz:
Trails Boy
Member
Posts: 35
Joined: 10:51 pm Apr 21 2012
Country:
Location: Princeton Texas (near Dallas)

Top end rebuild

Post by Trails Boy »

The 66mm would be the best since its the biggest right?
User avatar
Julien D
KDXRider.net
KDXRider.net
Posts: 5858
Joined: 07:53 pm Nov 07 2008
Country: USA
Contact:

Re: Top end rebuild

Post by Julien D »

Trails Boy wrote:The 66mm would be the best since its the biggest right?
66mm is just the stock bore. The piston will actually mic out a bit smaller than that. Wiseco does not do incremental sizes, pro-x does. I think you're over-thinking. If you want forged, standard size is your only option. For a cast, you could go with a standard C or D pro-x which is very slightly over size. Not enough to make a difference imo.
Image
Trails Boy
Member
Posts: 35
Joined: 10:51 pm Apr 21 2012
Country:
Location: Princeton Texas (near Dallas)

Top end rebuild

Post by Trails Boy »

Okay.. I just went with the Wiesco 66mm.

Thanks for all the help!
Post Reply