OzVMX Forum

Marketplace => Wanted => Topic started by: DG 26 on September 25, 2008, 06:36:15 pm

Title: piston
Post by: DG 26 on September 25, 2008, 06:36:15 pm

Giday all
looking for a 3rd over size piston & rings for a yz125D
Bore size is 57.5mm
and a rod kit to  ;D
Thanks

Title: Re: piston
Post by: Stewart Allen on September 25, 2008, 08:57:48 pm

Hi Don,
          Try this http://cgi.ebay.com/ebaymotors/Yamaha-3rd-Oversized-Piston-MX125-YZ125-YZ125X-NOS_W0QQcmdZViewItemQQcategoryZ35595QQihZ012QQitemZ220283374465QQrdZ1QQsspagenameZWDVW

Title: Re: piston
Post by: Nathan S on September 25, 2008, 10:35:20 pm

Third over should be 56.75mm.

Yamaha go in 0.25mm increments, up to 1.00mm OS.
Wiseco do 1.50 and 2.00mm OS, giving you a couple of extra bites.

Be careful with how much you pay for Wiseco pistons from the states, and be doubly careful of buying genuine pistons without rings - the rings are stupidly expensive from your local Yamaha dealer (insert my oft-repeated whinge about IT250 rings that cost nearly as much as a whole Wiseco piston kit here).

Oh, and any YZ125C ~ N piston will work, although you might need to move the ring locating pin in some cases (at worst).
Yamaha gives them all different part numbers because they faffed around with the number of rings, the ring thicknesses, the intake cut-outs, etc - but they're all the same basic piston and they'll all make it go brroooom quite effectively.

Title: Re: piston
Post by: caps 999 on September 26, 2008, 08:54:56 pm

i can get new wiseco kits if you want