cde050583

Allens performance have sorted the job, Mikuni on its way, fingers crossed for a transformed bike.

Going to have a chat with Allens performance and hopefully get something sorted, thanks for the suggestions

So finally got the Sherpa T 175 all back together and it struck up after a few kicks. The issue I have is when I acquired the bike it wasn't actually running and as such I have no idea whether the carb or the jets where making for optimum performance. I can obtain new jets of course but I don't have a bench mark to work from. The bike has good compression and has just been re-ringed and has new gaskets. It has an Amal Mk2 concentric 2625 carb on it at present and the symptoms are as follows. Lumpy running and not able to obtain full revs. Its very smoky and currently running using 95 ron and and Castrol semi syn oil at a ratio of 50:1. Its difficult to start especially when cold. Its fuel consumption seems to be excessive. Currently it has a Main Jet size 160, a Pilot Jet of 20 and a Needle Jet of 106. The needle position is at 2. Unfortunately my knowledge of 2 stroke carb tuning is limited as 4 stroke is more my thing. Any experience you guys my have or can suggest a different jetting that you know works well on your machine would be really appreciated.

Thanks all for your input. It was in motion that sorted me out in the end, all back together but now I have other issues so time for a fresh post.

Hi All, Looking to finish the rebuild on my 175cc Bultaco Sherpa T and need some new piston rings. The piston is a MAHLE and is 60.8 in diameter. Measuring the bore a 61mm ring should work but I am struggling to find a UK outlet for such a thing. I have tried the usual In Motion and other specialists but they have nothing listed. Also as it has been a while since the strip down could anyone please remind me the correct orientation of the piston. From memory the longer skirt on the piston goes to the inlet side but any confirmation would be appreciated. Thanks in advance for any help.

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.