Bultaco

Hi are there any major differences between M-49 and M-80 frames? Cheers

Hello, Can anyone help me identify the age of this Bultaco Sherpa T 125cc. The engine No. is TM 22100128, also could anyone confirm that the frame colour should be white? Cheers Gareth

thinking of buying a bultaco 199 model as I know for one for sale needs work thinking of tearing it down and steel liner the hubs modify the steering angle rear box mod and any thing else I can think of at the time as I am a engineer and have use of cnc machines and 3D CAD design software does anyone know what else can I do to make a special and stand out a bit more than a std bultaco been thinking of making a new side ignition case with a hydraulic clutch mod built into it can be done

hello guys was wondering if anyone has attached a bash plate under the tubes (159 frame) even adapted a ty plate or something? i do not want to cut off the old tubes but as i trial most weekends the damage is inevitable on the caseings----would sacrifice a wee bit of ground clearance to gain protection any ideas welcome cheers murray

Does someone have a parts diagram or picture of the front brake cable connection to the brake for a 71 Alpina? A picture of what I have is below. I would expect some type of clamp or threaded piece to hold the cable but there is just a little bracket with a hole. Does the cable just float on top? Am I missing something? I'm not sure what to make of this. Thanks!!

I have 10 46 gearing is that ok ballpark for trials riding, I am a beginner. Thanks

I entered my 1975 Butlaco Sherpa T Model 151 in a classic Motorcycle Show. To my surprise my bike won overall. There were about 30 to 40 bikes there. I was setting up and working all day on a AHRMA Trials event at Hollister. I wish I would have taken pictures of the show but was too busy all day. The trophy is Best in Show in memory of Jim Pomeroy. An awesome trophy. Good thing my idol Big John was not there he would have kicked my a$$

The 199a I'm restoring has evidence of a cold seizure so a full top end overhaul is in order. I'm looking for any information or advice on conducting a rebore. Not sure if it's a plated bore or if a straightforward rebore will suffice. Any help welcome!

Just recently completed restoration of my model 85 Alpina I purchased new back in 1974. Did a lot of dirt bike riding back in the 70s and 80s before it was put into storage for nearly 25 years. Took a lot of photos as I went along so I could get it back original. Engine fired on the forth kick and runs great. Head light and tail light both work as before, however the brake light doesn't function when operating the rear brake pedal. Bulbs and brake switch are new and check out using a volt-ohm meter. Have attached a wiring diagram of how my bike is wired. Could someone please review the diagram and see if I have missed something or wired it incorrectly. Any other suggesti…

She's coming along nicely

Hi, Just had a new main bearing and rod pressed onto/into the old crank. Question is: I didn't notice before but now the rod touches the webs... There doesn't appear to be any thrust washers. Is the rod held centrally by the piston? Are the thrust washers missing? Should there be any? It's a Sherpa 92 1973 thanks Paul

Spotted this little beauty in the parc ferme at this years SSDT. WHAT A CRACKER. I wanted it so badly, it hurt!! Talk about MINT, it looked like it had just left the factory

Hello all , A couple of questions for the gurus , I have a 199A that I am rebuilding , I was hoping for some help with parts that I need , and itit was a box of bits kind of purchase I am missing the two handlebar clamps any chance someone has a source for these ? Also my tank is a Sammy Miller aftermarket one and the cap Is missing it's an odd one its kind of like an old radiator cap it has half twist to lock action with ears catching the spout in the tank here's s pic Regards Bill

Hi all My Sherpa198a project is moving ahead again after a break for a few summer jobs. Engine stripped and cases split and I am now thinking ahead to assembly. I've read the workshop manual (which doesn't actually cover the 198a), studied the parts manual exploded view and trawled through similar questions/answers on the forum. I am therefore familiar with the two main methods of assembling the main bearings. Fit onto crank and then into crankcases or into crankcases first and then fit crank. But I did notice that quite a few people on the forum talk about the importance of taking care to centralise the crankshaft in the cases as you bolt them up. However …

I have a Bultaco model 212 250 alpina. The piston in this bike has a full length skirt on the intake side. Would anyone know how much a stock piston intake skirt is shortened? Thanks. Dean

Hi all, I wonder if you could help me with my 2 questions below... 1) I am currently finishing the full restoration of a model 150 Sherpa T 250 and got the engine running today after installing the (new style) electronic ignition from Dave at Bultaco UK. The bike starts, idles, revs and runs really nicely - the problem is that when i blip the throttle the revs don't drop back to idle as quickly as i would expect. After each blip, the revs drop gradually, slowly settling back to normal idle - it may only take 1-2 seconds, but it doesn't seem quite right to me. - I have had the engine fully re-built by the guys at Bultaco UK, so it should all be sound - The throttle se…

I am having a difficult time getting the rear wheel axel etc. back together. I took pictures before disassemly and it is set up the same way now. But when I tighten the axel nut the wheel will not turn. I know it needs new bearings and seals but .. I was hoping to get it back together to give it a once around the yard and work out some of the other set up issues (brakes,clutch etc.) Does this set up look right? Thanks

Does anyone know the thread size of the bottom yoke pinch bolt on the earlier Sherpas please. Looks as though they are 9mm but I've no idea what the pitch would be. 8mm is too small and 10mm too big. This is for the steel yoke with the single pinch bolt used up to the model 80. I have to get some new bolts and also a tap to clean out the threads. I seem to have misplaced the original bolts... And I thought it was only Ossa and Montesa that used stupid odd number sizes for their threads... First time I've come across anything other than even number sizes on a Bultaco

seems as though we used to use a stop with a calibrated slide that telescoped out the center to accurately set time on our Bulls and Pentons. dont seem to be able to find what i remember now. maybe i am dreaming that said what is the best/most accurate method of setting ignition timing

I guess everyone has their own lockdown projects on the go at the moment. Mine is using up accumulated parts to put a Sherpa together using a late engine in a slimline (91B) frame. I am quite keen to get the bike relatively finished so that I can move onto other things, so far so good except I had some 35mm triple clamps that I thought would be suitable as they had quite a bit of offset but it would seem they have too much. As it stands with the rear shocks measured at 355mm (temporary fitment only to hold the bike together) the wheelbase measures 1335mm (52.5”). Standard is 1315mm (51.7”) on 340mm shocks I believe. Not sure I will be able to get this back by dropping the…