Bultaco

hi i am a new member recommissioned a bultaco lobito 175 new piston new conrod kit new crank fitted by acme motorcycles put crankcases back together gears seem ok got engine going ... problem is fitting gear selector and return spring within clutch side casing if return spring is fitted as attachment photo then gear lever cannot move between 2 "bosses" 1 stationary in casing near clutch and 2 boss on selector back which attachs to pawl mechanism at 12o clock mechanism then held square by casing ......if spring is fitted as photo end of spring will not pass boss on casing any help would be welcome struggled for 2days ..must b…

Hi I'm in the process of restoring a 198 t 1978 . I've been offerd a swing arm for it . The arm has a chain oiler drip screw in it my question is was this Pacific to the year of bike or were they an optional add on extra at the time ?

My clutch case does not have any clearance and rubs on the clutch centre drum pins and the end of the clutch springs ? Not sure if I have the wrong clutch centre hub,or the wrong clutch case ? Year manufacture 1976.

Another ignition timing question ! I acquired a model 191 Sherpa 350 which appeared to have minimal hours. Needed TLC with a standard piston ( piston / cylinder tolerance of .004.) Cleaned up the bike and carb and put in new set of rings. Getting ready to start but first checked the points and timing. ( Bike ran when purchased ). Points within spec - .016 but when checked timing , I found the BTDC was 6 mm ! Can this be given that the bike nan prior to purchase , even rode it up the street. Am I miss something . Here are a couple of pictures . Any help would be appreciated...

Ok guys I’ve read all the old stuff on these frames before posting this,just so you know. But I’ve just bought a load of Bultó bits and one was this frame. In the old stuff it says that this frame is documented In Don Morley's Classic Spanish Trials Bikes book on page 40, Is there anyone out there with this book that could forward the image to me. It’s just that what ive read all Miller frames had a number prefixed by SM. Ive enclosed an image of my frame number, but not prefixed by SM. Basically is it a Miller frame, or a Whitlock frame or something else. Many thanks guys.

Hi All, Just aquired a Bultaco 198-A I think? to restore. I was told by the seller that the bike has been in a shed for 30 years [And it looks like it]. I am after confimration of which model I have got and a few other questions. The frame Number is RB 198 03580-A Engine number is RM 198 03580-A There are no bottom frame tubes but a factory looking alloy bash plate fitted. Also the rear frame tube is missing and looks as if it is an original alteration. It looks like the 199A Bultaco on the In motion Bike ID page. I will be looking for a Rear Wheel and Brake Plate as there was an unknown wheel fitted very badly in the bike. I wil…

Anyone help with identifying bike I am looking to purchase. Frame number is :- PB187OD408 Engine number is :- PM 187OD408

Does anyone know where billet fork yokes can be got for a bultaco sherpa 199a and magical progressive front springs aswell

I have two other bikes with Bing carburettors that perform perfectly. my 350 Alpina (1977) however has always been a trifle fluffy on low throttle openings. I have just fitted new needle and jet as part of a service and the needle clip was in the lowest groove, what is the recommend position or is it just suck it and see. Thanks.

Dear All, Just getting to the end of my Frontera 370 restoration, after 9 years! i'm about to start on the electrics. does anyone know anything about the box of tricks they used to have under the tank. mine had a ULO EBL 801 which was obviously knackered but it seems they were 6 volt. As i'd actually like to see where i am going i'm planning on going to 12 volts and LEDs front and back. Has anyone done any 12 v conversions on theirs? Paul Cundy sherpa 199b 340, Frontera 370, Range Rover P38, E-type S3 V12 OTS and Noble M12 race car.

Recently bought a model 27 as a resto project and have removed the front forks for a strip and rebuild. The bike has been stood for 30 odd years and the the one fork leg stripped out fairly easily but the other one is a bigger problem. The damper rod is jammed in the stanchion and refuses to budge, even after giving it a good soak in Plusgas for the last 3 days. It's got to come out as I'm fitting new stanchions, the old ones are round and true, but the chrome is tatty. I have removed the ciclip but rod won't move either way. Any ideas as to the best way to remove the damper rod?

Hi again all. Back again so soon. I am literally about to order all the bearings and seals for my 198a and I thought what the heck why not fit a roller bearing to the timing side like many others have already successfully done. An extra £30 or so in percentage terms is not much. So my question is what type of roller bearing to buy? What type have you all fitted? I note that DaveyS posted a similar question back on 26th June and he has used an SKF NJ205 ECP/C3. This type of bearing allows free float in one direction but not in the other and fitted with the flange against the flywheel means that if the crankcase expands more than the crank itself, which it probabl…

Hi all, I'm desperately in need of your help! I think I just made a BIG mistake ! I bought this bike, Sherpa 125cc, last week, it was in very good shape! It even started after a few kick start. I didn't use it, just tested it, and then it suddenly stoped while I was riding it, after less then a minute. After that impossible to start it again. So I checked many things, changed all oils, and cleaned the carburetor. That where I made a huge mistake ! When I fixed back the carburetor, I inserted the "bushel" in the wrong position, 180deg offset from the right position. I thought it was ok because I saw some guides inside the carburetor and thought it must …

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 …

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.

Hello. I saw some old topics which recommended a NJ 205 ECP/ C3 bearing for the ignition side. This was specific to Bultacos but probably applies to lots of others. I bought an SKF which was pretty pricey at £30 but the benefits of fitting it sold on the outlay. The SKF has a collar/flange on one side and the whole outer bearing can slide off the other uncollared side. When I put the bearing on the crankshaft (370 Frontera Mk10) the bearing inner is up against the slight raised section of weight, as should be, but the bearing outer is free to slide up over this raised section and sit against the weight. My concern is that in on assembly when I drop the crankshaft …

hi I purchased 163 short block The crank is it 60 or 64 stroke .so I find right cylinder

Hello. just acquired a nice 198A Just ordering some parts could anyone tell me what fork seals are required. also the mikuni carb is leaking but it is going into the air box taken a pc of the carb seems to be coming from the bottom is it a ball bearing ? I have ordered a new air hose as the one on is split . Any help would be appreciated Greg. R

Help please. I need a new simplex primary chain for my 250 sherpa. In Motion are out of stock is there any where else I can get one?

Does anybody recognise this rear brake plate, It's 133mm across shoes 12mm spindle numbers inside? Part number who knows. 340.16.002.03 montesa ktm husky?