Hi all, new to the forum and hoping someone can help. Could anyone tell me where to locate a piston for my 221 frame number sherpa t 125. The piston measures 60mm and as far as I can tell from the lack of markings it's a standard size. The bore measures 60.986mm. I have looked at the usual sites, french classics, in motion etc but can not find a listing. Even good old flea bay had not come up with the goods. Any help greatly appreciated. 

Hi, Kevin Brendon Racing is a good place to have a look. Although his Bultaco listings start at 250, there may be a close match for a different. The Montesa ones start at 61mm, well worth a look. When you get fixed up, post again on here, the info could help others.

 

My sherpa t is a 221 but is a 175 ?Had it since new but never had the head off but done a lot of work So are they 125 or 175 !!

2 hours ago, cde050583 said:

Hi all, new to the forum and hoping someone can help. Could anyone tell me where to locate a piston for my 221 frame number sherpa t 125. The piston measures 60mm and as far as I can tell from the lack of markings it's a standard size. The bore measures 60.986mm. I have looked at the usual sites, french classics, in motion etc but can not find a listing. Even good old flea bay had not come up with the goods. Any help greatly appreciated. 

Your bike, a model 221, is a 175cc.  The Sherpa 125cc is a model 185 and has a bore of 54mm

The model 221 uses a 250cc engine which is sleeved down to 175cc so you can use a 250 piston and bore it back to 250 if you can't find the 61mm oversize piston