I've recently acquired a 199B sherpa t that has some gear box issues. Namely the shift forks are horribly modified, and butchered. I think I saw on this forum at one point that someone had an exploded diagram with hand written part numbers on it for the shift forks. The diagram itself was likely that of a 214 frontera which physically has the same gear box but with different ratios. So if anyone could post the diagram I'd appreciate it. I won't even comment on how rare six speed shift forks are and how difficult it may be to source some. Worst comes to worst I have a 5 speed cluster from another sherpa that I can likely make work. For those curious the serial number is 14446

Thanks in advance

Steve

BellaVista in Spain may have them. I needed a final drive sleeve gear for my 340 Sherpa which is different from the 5 speed sleeve gear, and was able to get one from them, through In Motion Bultaco UK

We sent the old one to them so that they could match it up as there is no parts diagram or part numbers for the 340. Worth keeping in mind if you can't find part numbers.

I think to make a 5 speed box fit the B cases, the layshaft bearing housings may need boring out to take the different bearings as the 6 speed uses small diameter needle rollers. You might also need to use the 5 speed selector pawl mechanism as I tried a 5 speed one in my 6 speed and it doesn't work due to it being machined differently on the inside where it engages with the drum

Probably easier to just use 5 speed cases

The MK 10 125 Pursang also used a six speed box so they might also be the same. The engine number for them is M 194. Graham.

Hi guys thanks. I've emailed in motion to see if they have any parts or suggestions. Woody you're right about the needle bearings. If I have to go to the 5 speed I'll find a set of 350 cases from an earlier sherpa t The 340 barrel and crank will fit into the earlier cases.

Steve

like this 1 this 1 just been preped for my next rebuild. shame as i sold a 199B the other month in bits with good 6 speed gear box only have the 1 6 speeder now witch i hardly use.

Edited November 25, 201411 yr by bondy

My bad I labeled my serial # as 14446. It is not: it is 14644 sorry to anyone reading that may own the number i originally posted

Steve

Yep gearbox parts are wicked to get had to replace some too.

If you don't got parts from any of the mentioned ressources for your 199b and you can provide good photos from the parts which the main dimensions I might help out.