1974 Yamaha MX 175

[DCPlasticsguy]

Can I use a wiseco piston from a 1976 Yamaha YZ 175 in my MX 175 cylinder? The wiseco part number is 374M06750. It
would allow me to go over a few sizes from the oem yamaha pistons. Also, Wiseco shows a piston for the 78-82 DT 175 and CT2/CT3 175 models. That part number is 471M06750. The pin and bearing sizes would both work. Please let me
know if anyone has done this.

[vandy010]

Nathan should be along any minute now.........
i'm not too up to speed with the 175's but a 76" piston kit into a 74" on a 125 is done everyday and not a problem. the porting hasn't changed enough to require a new piston set~up so i'd be happy with the 76" wiseco kit.
i'd reckon the later would also work as in the 125's, i think up to 82 are all interchangable as long as you have the right rings for the right piston as there are some different ring configurations between the pistons.
buy a whole piston kit if you can.

[Freakshow]

YEp just check that your using the iron bore rings ( one listed in Wiseco next to the MX rings)