OzVMX Forum

Marque Remarks => Yamaha => Topic started by: TT5 Matt on May 25, 2009, 07:10:08 pm

Title: yz125 pistons
Post by: TT5 Matt on May 25, 2009, 07:10:08 pm

will a 85 yz125 piston go into a yz125e 78 model? they both share the same bore/stroke and piston pin so does anyone know or tried this combo?


TT5 Matt

Title: Re: yz125 pistons
Post by: caps 999 on May 25, 2009, 07:42:40 pm

dont know about that one it think 76-82 intechange but later i dont know

Title: Re: yz125 pistons
Post by: Nathan S on May 25, 2009, 08:58:12 pm

Yes, it will work.
Yamaha has a squillion different part numbers because they were forever tweaking stuff like the number and thickness of rings and the skirt cut-away, but the pistons are 100% interchangable. They will all also interchange with DT and IT125 pistons.

I know that Wiseco has a different part number for the 85 compared to the earlier bikes, but I can't spot the difference.

The YZ-A piston kits have a different part number because they use a different ring to suit the chrome bore. The piston itself is 100% interchangable.

Title: Re: yz125 pistons
Post by: oldyzman on May 25, 2009, 09:25:39 pm

hey nathan, is the skirt the same.  ie to give the same port timing on inlet..
Brett