Bultaco

Hello again, Refering to my 64mm stroke crankshaft in my 325 sherpa t engine, that should be a 60 mm stroke. Am I disappointed after fitting a new rod kit and assembling the engine cases.You better believe it I am. Should I have checked the stroke? Maybe I should have.But in my defence I bought it as a basket case. Well I have a Italjet 326cc engine spare sitting on a bench in the shed.Does anyone know if the crank out of it will fit my Bully.I know they share common piston's and rod kits.They have the same flywheel.They share the same bore and stroke.I guess I could strip the engine ,but the work benches are full at the moment. So if you can help it would be apprec…

Hi Guys I bought a model 91 on E-bay about a month ago and cannot start it. The engine was reported to be a runner - but that's another story! When kicking over I get a god spark - the plug's a BP5ES, but the engine doesn't fire. I've had the carb apart (Amal Concentric) and notice the slide (with needle) is a very tight fit in the bore of the carb housing. I think this could be the cause of the problem and intend to polish up the slide using crocus paper or similar to make it freer to move. Any other places to look? Roger B

I got the last few important things worked out and "rode" the bike around the yard today. Still need new rear brake pads, switch the rear tire out... it is too big rubs on the muffler a bit, and to dial in the front brake for better performance. I have been bitten by the Bultaco bug. I posted an ad on the local internet classified ad site and was offered two Bultacos. I am to pick up friday The one not pictured is a Matador (not sure of the model #) I got all of the stuff in the photo and the matador (condition unkown.. motor is on the left in a box in the photo)

Hello, I'm fitting a new piston kit to my 159 350 and I have had to fit 3 base gaskets to get the piston height correct.Is this normal?It's a mahle piston. I've also had to machine 2mm from the exhaust side of the skirt as well.My bultaco dealer said I may have to modify the piston. So I just thought I'd ask if anyone else has had to carry out these mod's while fitting a new piston kit. Thankyou

I plan on upgrading the stock 28 mm Bing T84 (the slide is badly worn and I'm told virtually impossible to replace) to a Mikuni 28 mm TM flat slide, VM 28, or VM 26 round slide. Does anyone have experience with any of these carbs on a 199A? Will the 26 mm work well or is it too small? I've been told that the smaller bore might boost low rpm performance. What jetting/needle combination works at 1500 - 2500 feet? Thanks! tightwoods

I have a late 60's early 70's front wheel, with the hub that is the diameter of the brake drum, both sides. I need a brake plate for this and wondered if this hub needs the plate with the cable guide and the rear facing brake arm, or can later plates be used in this hub? Cheers.

Hello all, At the moment i`m restoring my sherpa 198A with a mk2 concentric and i just cant get the thing to flood from the tickler. I`ve had the carb in bits probably 2 dozen times now, have checked everything is clear and put a new gasket in. The bike runs fine once its started which i can only do by taking the plug out and `priming` it with a drop of petrol. I`ve got new crank seals for going in so i`m hoping this will solve the problem. I`m wondering if the jets are wrong or there is even a jet missing. The float chamber is filling up fine and i`m at my wits end!!! If anyone can help or as had similar problems with this type of carb any advice or comments wou…

Early Bultaco for someone. http://cgi.ebay.co.uk/VINTAGE-BULTACO-TRIA...id=p3286.c0.m14

Hi I am in the final stages of rebuilding my Sherpa 80 series motor. Bottom end is complete and fine. I am about to fit the new piston and any clarification on side play at the small end would be helpfull. I have 2 Sherpa the other is a 198-A which has recessed spacers between the needle roller and piston. The new piston for the 80 engine is not machined either side of the small end, so my question is :- A Do I turn some recessed washers and equalise the conrod with the pistons centreline minimising side play. B Not worry and just use the plain washers supplied by bultaco UK and thin them to minimise the side slack on the end of the rolller bearing allowing the…

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

Before photo I bought this Sherpa T M80 in the spring of 2009 for $150 Canadian. The previous owner had the bike since the mid 1970

Just wondering what gearbox oil people are using these days. I would like to try synth equivilant 10W/30 or /40 as i use in my gas gas - can anybody comment please? I will stay with ATF in the clutch though. Also i have just rebuilt my M199 forks (just two new o-rings and made up new piston seals)what a difference. the forks are now the best i have ever had on a Taco but feel a bit firm for my light weight. I have always gone by the what is the norm (180cc - SAE 20/25) can anybody comment on a lighter oil or more airspace before a go to the effort of changing it. thanks

Hi. I have a couple of question relating to my M92 project. I'm putting together an exhaust system for an M92. It needs the smaller square flange for the square 325 barrell. Are the pipes that fit the two flange sizes different or do they both take the same pipe diameter? I can get my hands on a later exhaust that has the larger flange welded on. If I ground this off would the pipe fit inside a smaller flange? Also I have a set of forks. the stanchions are tapered at the tope and have knurling 200mm from the top. I need a set of triple clamps with the lowered alloy bottom yoke. I was wondering if they are all the same or if there are different sizes on some models. I …

Hey folk's.... Here's some links to my BULTACO SHERPA 199A that I just restored for riding purposes. I think it turned out FANTASTIC, not a museum piece, just a real classy rider !!! Happy Trials until next time...

Hi. Just wondering which oil I have to use for the gearbox from my 250cm

I have heard a whisper from a friend in America, that a dealer here in the UK has bought a large quantity of Bultaco`s and is shipping them in to England, 50 plus I have been told, anyone know anything ?

I have a one peice pipe and mid box from a mid to late 70s sherpa 250. It has the square flange and retaining spring fitting, although the pipe has been welded to the flange. The mid box sounds rough as hell and I can hear things rattling about in there, so it's probably shot. For my M92, which would have had a three peice exhaust, I'm wondering if i can cut the mid box off and fit a new one, in the style of the original . Also wondering how the attachment would work. Does the pipe need to slot into the mid box, with the rubber coupling over the top, or does the rubber bridge a gap between the two? Does anyone make a mid box designed for replacing this part of a one peice…

Hi when I bought my latest Bulto (199) its all in pieces. As ever bought it off a guy who was going to rebuild it to its former glory. It had a noise in the engine so he stripped the whole bike down and put it into boxes. Found out that he could not find out what the problem was and left it! So I end up with Saturday putting it all roughly back together again to find out what

Hi could anyone help me with a rear tyre selection? I have been offered a 4.10 x 18 for by back wheel, will this be too wide on a 198/199 as the stock ones are 4.00 x 18. Anyone inform me what the best tyre and pressure to use just for local trails and a bit of fun. Thanks

Can anybody share some mods for M199 front suspension please? At present they have an air cap (i asume this is to let air out?) and a car motor valve spring on top of the std spring.