Think I remember Dave Renham saying that half a dozen 6 speed 250 versions were made for France (the '250' versions were all 238cc from about 1975 - only needed an overbore to get back to 244cc)

I'd like to add one of those to my collection

Paul Mac

Find a 125cc Sherpa (they're 6 speed) take one 198a and put the 250 top end on the 125cc bottom. Modify rear frame loop to 198b spec, fit 198b airbox, get a square section swingarm made, paint blue/white and there it is - a 6 speed 198b clone.

In reality, I think there is little difference between a 198a and 198b. Colour, airbox, swingarm, sidestand and frame loop.

And so do I stand corrected.

those are the nos (?) pattern alloy ones try bultaco uk think they have them.

very good they are too

And here's the thread to the debate: Does the 198B exist?

http://i161.photobucket.com/albums/t236/kdhewson/1981%20Bultaco%20199B%206%20speed%20white%20frame/SDC11399.jpg

I had one fitted too my 199B , it had D-O-A stamped on it , i bought 3 NOS ones from italy , 1 went on my bike and the other 2 where sold on ...

hi keith have you got an email adress for the kick start?

Find a 125cc Sherpa (they're 6 speed) take one 198a and put the 250 top end on the 125cc bottom. Modify rear frame loop to 198b spec, fit 198b airbox, get a square section swingarm made, paint blue/white and there it is - a 6 speed 198b clone.

In reality, I think there is little difference between a 198a and 198b. Colour, airbox, swingarm, sidestand and frame loop.

I was told the 125 had a different crank, flywheel etc ?

It's a different stroke definitely but whether it is the same assembly I don't know (ie; a 250 crank might fit the cases) I don't know if it is the same 6 speed gearbox as used in the 340 either.

I was just musing really. A lot easier to turn a 198a into a 198b clone if you like the style of the b better than the a.

198B Models were NOT 6 speed, only the 340 was six speed , no other

sherpa was six speed and certainly not a 125!

Bultaco alledgedly made 10 198B 6 speed bikes for one order that went

to france and thats it ,no more.

There was a 6 speed pursang mx bike but not a sherpa.

The cases on a 125cc sherpa (185/185B) model has a smaller base gasket

and stud pattern , so making this a 250 is impossible.

A 221 model 175cc sherpa is basically a sleeved down 250.

Woody , you know who I am , but I thought your knowledge would have been better

on this one!

Edited October 9, 201114 yr by pedronicman

Are not all M184/A/B 74's and M185/A/B 125's Sherpa T's all six speeds

Are not all M184/A/B 74's and M185/A/B 125's Sherpa T's all six speeds

Yep they have 6 speed engins.

There is one other thing that makes me wonder, the bike in E-Bay is fitted with "normal" tireholder in the rims.

The original 198b and 199b had no standard tire holder which you can look up on any factory photo of the bike.

Instead they had tiny plate screws 6 pieces for one rim that where

mounted at the outer sides of the rim for holding the tire.

Sadly this is not "street legal" at least in Germany, maybe this outfit

was only deliverd to the Bultaco homecountry and at least Italy?

Edited October 8, 201114 yr by PSchrauber

Woody , you know who I am , but I thought your knowledge would have been better

on this one!

You're right - it is - I was just musing (messing) with the 125 to 6 speed 250 hybrid, although I'm not overly familiar with some of the aspects of the 125cc Sherpa. My thoughts on those is that they were a waste of perfectly good metal and worker's man hours.....

But, later 125cc Sherpas are 6 speed (75cc too I think)

You must have missed my bit about the French 198b bikes.

Yep they have 6 speed engins.

There is one other thing that makes me wonder, the bike in E-Bay is fitted with "normal" tireholder in the rims.

The original 198b and 199b had no standard tire holder which you can look up on any factory photo of the bike.

Instead they had tiny plate screws 6 pieces for one rim that where

mounted at the outer sides of the rim for holding the tire.

Sadly this is not "street legal" at least in Germany, maybe this outfit

was only deliverd to the Bultaco homecountry and at least Italy?

the 340's delivered to the uk had the self tapper screws rather than a security bolt.

It was a good idea but didt work in practice. Everyone swapped them.