Pistons?

[Paul Harris]

I've decided to do a top end rebuild in my '82 250MC. It's standard bore so 1st OS...what's the best choice for piston? Are those aftermarket reeds worth it?

Thanks, Paul

[ozktm]

You will be able to use a '73-81 type piston, just needs modifying to have the reed holes etc to match the original.
I think Boyeson dual stage reeds are available, a new set of reeds can't hurt especially if you don't know how old they are, else go for the v-force upgrade, other posts are probably on this forum about them as the yamaha and honda guys are using them.

Try Andre's  site for the piston : http://www.enduroklassiker.at/

if Andre doesn't have what you need, contact Al Beuhner : http://www.pentonpartsusa.com/2A%20KTM%20engine.htm

else contact me, and ill sort a piston kit out for you so its ready to go.

[Paul Harris]

Thanks for the advice Adrian.

[Tim37]

I too have an Air cooled 82 cylinder that I wish to fit to my 81 250 gs ......pistons are not readily available for the 82 reed setup ....I think modifying the piston port style piston i the only option ? anyone else know where  the Rv piston with two round holes can be found .....

[oz555ktm]

ANDRE HORVATH'S KTM KLASSIKER ,   He is Number 1 for KTM stuff ....

http://www.enduroklassiker.at/

Hear is ya Piston ...

http://www.enduroklassiker.at/en/engine-parts/2237-kolben-250.html

[YUMASTEPSIDE]

....you can also try seven4racing.com.....they're good to deal with

                Roger

[Paul Harris]

Thanks Roger - not have much luck with a single ring 1st OS piston...I'll look them up.

[Gippslander]

sent seven4one racing an email enquiry a week ago - no answer as yet - must have "gone racin"

[Paul Harris]

I got a 71.5mm 2 ring piston from Al Breuhner - having it modified to fit