I have a 1999 Gas Gas TXT 321 with a shot piston. It didn't owe me much after 10 years hauling my large butt around and getting overheated. I'm surprised it lasted that long. So the my dealer is saying that Gas Gas USA doesn't have any. Mine needs a "B" piston and of course that's the one they don't have.

Anybody have any leads? Wiesco doesn't make one, nor do any other pistons makers that I can tell. If your local shop as a decent part selection I love if you'd drop me their name. I really want to fix the mighty 321.

--Victor

Vic,

Pistions are available here in the UK.

However, you'd almost certainly need to re-plate the bore as well, after 11 years...

Normally they re-plate to the new piston spec, and the letter is no longer an issue.

Putting a nice new piston into a tired boke can be a false economy.

Mike

motomerlin i once had a gasgas 1995 model jt 350 i think you engine is about the same as my engine was anyway i was told that a bultaco 325 cc over size pistons will fit the bore as they are marle pistons

The shop that tore down the motor said the bore is in good shape. It measured out as being in tolerances, but the piston measured around .007-.008 out of spec.