Bultaco

I think it's sherpa pre 70 but not 100% any ideas? 140mm dia at brake drum I am looking for a brake plate if anybody has one Thanks

Hi Chaps I am looking for info on my M49 which I purchased in 2016. What I know so far is it was first registered by Sid Moran LTD (Windsor comp shop badge still attached to rear mudguard) on 16th October 1969.Reg No MPP8H frame No B4900477 engine No a few digits earlier. It was then sold to Robert John Swift on 29 October 1969 who appears to be the only owner until I purchased it. Not sure why frame is yellow but removed some of the paint and it doesn’t appear to of ever been silver. Am not going to restore it but use it as is as it just looks so good with all its battle scars. Am looking for any information on the bike or The Rider Robert Swift. Regards all David

Got my model 158 started today first time in a number of years. i was putting a kill switch on and putting the earth wire to the frame there are 3 colours on the frame but the bottom colour was dark blue. I think that was original. as it was a bugger to get to shiny metal. The bike was 1st registered in 1976. Would be nice if someone new the answer. Greg. R

Can anybody identify this fuel tank, I was thinking early pursang. It came on my m49 project. Thanks Derek

Hi all I know its a longshot but does anybody have the side panel/airbox cover assembly for model 49 they no longer require and wish to sell, battered doesnt matter as i can repair or make up in fibreglass if reqd. In motion sell them but out of stock at the moment. There is one on ebay with a fuel tank but at £185. Thanks derek

I want to clean out my Sherpa exhaust by the caustic soda method but reading up on it is a bit confusing... use of a rubber/potato bung, etc etc... If anyone has got any experience of doing it this way could give a step by step guide that would be great. Cheers Tony ?

Can not find much on why we never got Astros in UK been after one for a while but price rise and sterling pounds got worse against the dollar because of brexit.The Astro and pursang 360 are they same engine.Biggest guestion thoe why no one bought one and put on road as local run around.Been on youtube only seen on race tracks no American seen on road with them.Thanks

Just finished rebuild of M49 Sherpa and the fibreglass tank is going to have to be lined to use, has anybody got any suggestions for an alloy option? There is one on auction at the moment but just looking for alternatives. cheers

Hi All - A friend fabricated a wrench to help disassemble my OEM m80 Betors for rebuilding and is having a heck of a time removing the threaded body cap to access the internal seal, shaft assembly and components. I can't imagine Betor would choose a left-handed thread for this, would they? I didn't see any evidence the caps are peened or spot welded in any way. Any ideas? Christian

Hi All, While doing a little cleanup around the house over the weekend, I decided it was finally time to address a pile of old tires that had been collecting out behind the garage. They were mostly unusable motocross tires pulled from earlier restorations but, while loading them into the truck for disposal, I took a pause before throwing in the old trials tires that came mounted to my recent m49 and m80 purchases. The m49 had an ancient Pirelli MT 08 Trials up front and a Dunlop Trials Universal in the rear - both tires severely cracked. The m80 came with Dunlop Universals both front and rear and are in slightly better shape. I decided to hold on to the better of…

Could someone verify shock length for m-27? .. I have some 340mm on order.. Because I saw somewhere that that was correct...after digging out and measuring what I thought were original Betors I'm having doubts...they are 325mm thanks!

In my model 49 parts book beside the front wheel spokes it has written in pen, probably by my dad: "use 86-04-003/5" I think this might be because the rim he was using had a different ERD (effective rim diameter) to the standard one. Does anybody happen to know (or can look up) the spec for these part numbers. It should be spokes, and presumably there are two different angles for the inside and outside spokes. Thanks!

Hi all new to the forum just bought a bulltaco Sherpa T 350. But not really sure the frame number is B- 8002881 engine number is M- 8002922 Hoping someone could help identify what model I have Greg

I’ve searched the forum to no avail, so can anyone please tell me what size puller I need for a 350 213 Alpina with a Motorplat flywheel, or how to measure it to get the right one?

Prior to rebuilding this long-term (dismantled) project, I've begun dragging out and examining parts, with a view to doing a trial assembly before parting with serious money on chrome plating, powder coating, etc. Starting with the frame, I found two sawn/ground off welds on the seat rails either side of the air filter (arrowed in pic.) :- Anyone out there know what was there originally ? Brackets/ lugs/ a bridge across the filter ? ....and do I need to replace it ? Outer edges of the air filter body appear to stand slightly proud of the frame rails, and there are marks on the underside of the seat part of the tank/seat unit. Bike is a UK supplied a…

Hi Guys Does anyone have an engine manual they could possibly send me for a model 92 325 Sherpa? I have stripped it down as it was in a bad state, and ordered all the parts needed from In Motion but when the gasket kit has turned up there is 3 o rings (two the same size) one is smaller. but the engine never had any in at all anywhere when stripped so may have perished away.

From what I can see it will cost me around £200 to have a pair of Bultaco fork legs rechromed/refurbished. And that's assuming they can deal with the taper at the top for the fork yoke (early Sherpa). Or I buy new ones for half that price from inmotion. Are the inmotion ones likely to be of a comparable quality/tolerance? Anyone else bought them and have an opinion? Presumably they are a pattern part and not genuine old Bultaco stock. Thanks!

Can anyone advise the size - diameter and pitch - of the thread at the fork tube top? Need to clean up a little whoopsie and can’t find the size listed anywhere. Thanks in advance . Cheers Paulmac

Could anyone advise what carb setup I should start with for my Sherpa 250 198A using a Dellorto PHBH26. BS jet sizes ,needle etc. cheers in advance.

I got a crusty on the outside, perfect on the inside NOS Betor fork locally was originally built for a Rokon dirt bike from the mid 70's. It looks like a cast version of a Ceriani GP. Anyway, the bore of the stanchion looks worse than the a typical DOM tube and the pistons don't have non-metallic rings. I am thinking I should hone the bores and add micarta bearings to the piston? The main slider bearings are perfect, zero play. The springs are 495 and wire 3.95 which should be good for a BSA single? I appreciate any advice. For reference. Untitled by barnstormerbikes, on Flickr Untitled by barnstormerbikes, on Flickr …