Bultaco

Can anyone tell me the factory recommended ring end gap for a M116 Alpina (new rebore, piston and rings)? My service manual has 2 listings: Ring End Gap .002 New .012 Thanks.

What petrol/oil ratio do folks use nowadays with synthetic and semi-sythetic oils?I seem to recall using 32:1 with semi -synthetic back in the early eighties.Also ,what is the recommended sparkplug for a 199?Can anyone help?Cheers,Alt.

Hi all. I joined this forum recently as I have a 350 Sherpa 199 (red / silver / black) that I want to restore to use for a but of fun (i.e. not concours). I've gathered plenty of experience rebuilding / building bikes over the last 40 years or so, but do like to have a manual when I do an engine for things like wear limits on big ends / bore / crank runout / torque values etc., ohh, and a decent diagram or exploded view of the gearbox. The bike has had little use and is pretty much stock, bar the universal plastic guards. It was 'parked' in '93 because the clutch was slipping (and I was about to go work abroad) I stripped and boxed it. Having retired 3 years ag…

I have heard of putting a longer front brake arm to give more leverage to pull the clutch actuator. But, have any of yall done this? Modify the operating spindle, and flywheel cover, to accept a needle roller bearing, which can be easily lubricated, which greatly reduces friction and improves clutch action substantially. http://www.classictrial.co.uk/bultacodevproject.html If you have done this, how did it work for you? Also, do you have any tips if you did this mod yourself? What size bearing, how did you machine it, etc? Thanks, ryanroz

hello again guys need your help on refiting the gear selector. ive took it off to change the gasket but not sure how it gose back. ive had alook in the manual it says put the bike in neutral? how do i do this now all the bits are off? once in nueutral it says the selector must be properly timed. witch way dose the pawls have to be???

Anyone know if the rear wheel spindle on a 250t is the same size (ie diameter) as a 350t ? Cheers

HI guys, Does any one know of an engineer in the bristol area who would take on small jobs. I am on about silly small jobs that you can do at home with a lathe and a piller drill. the problem is that i have never used a lathe and i have not god the money to buy a decent one. All i need is the odd bush to be made or a spacer rather then 20 odd washers. Whilst i am on the topic how does one learn to use such equipment, I know you gents more then likely learnt at school however i am of the generation where we had to learn sewing and cookery at school rather then skills that are usefull in life. ( just to let you know i could cook a fry up before school taught me how to b…

Anyone know if there are any differences between a 151 and a 159 cylinder head? My 159 has a damaged head and I can get a 151 head. Any help appreciated. Mark G

For my M92 project I have the offer of a barely used Dellorto, from a 2003 Gas Gas pro 300. I havent got it to measure yet but I think the spiggot OD is 31mm. Does anyone know if this is right and what carb rubber I need to fit to the two stud amal fitting? Does anyone in the UK sell a rubber for an amal to dellorto conversion? Cheers Hoodie.

hi ive ask a similar question before. the top stem castel nut dose anyone know the size? theres a tool on ebay witch looks great for this but not sure if it will fit

Hi What is the correct jetting for a Sherpa exhaust 198 Vm26 Mikuni Carburettor?. It's currently fitted with the following Main jet 120 Pilot jet 35 Needle jet 182 N-8 Jet needle 5F21 Slide 2.0

hi all ive had the clutch basket off my 199A to check the seal. and notice the was some play in the shaft back. and forth is this normal? clutch oil as been getin throw to the gear box allso the crank seal plate as asmall pice missing on the outer side in the inside were the seal seats may be geting throw there ive checkt the gear shifter seal looks lick its not worn but is verry slight movment on the o ring anybody any ideas? allso i took the gear leaver shaft out to check the o ring i put it back on whent on ok i just want to know will this be ok?

Any decent footrests available for the Sherpa that don't involve serious welding/machining/fettling or is this the only option?

hi all ive just got aoungher sherpa 199A. its got the alloy tank witch is not to bad but it as a slight spit on the top off the tank were would the bet place to get it fixed in the northwest

Finally got around to getting the old 199B 340 Sherpa running again. Trying desperately to sort out the "projects" worth persevering with and getting rid of everything else. So fitted the new VM28 carb thats been sitting in the draw for the past 18 months but the carburation just seems a bit off. The carb has been jetted to suit a 340 199B but thats always a bit of a guess so i'm wondering if anybody has fitted a VM 28 and got it running spot on and if so what jets they are using. From memory the jets in it are as follows Main 130 Pilot 35 Needle jet N8 Needle 5DPJ i think Slide is 2.5 The pilot feels a bit too lean especially as the only way i can get it to be a…

Hope that worked.... She's running, but needs the rear brake connected, a seat, air filter/box, and chain fitted. Back wheel really needs re-spoked, but that can wait until next month. The exhaust is more or less touching the back wheel however, so will have to put a spacer between it and the frame to give me some clearance. Threads on the rear wheel spindle and swing arm spindle don't match the nuts I've got. was hoping to have a drive round the yard at the weekend, but looks like it'll have to wait.

Hi ime just building the bike up and wondering if there should be rear tank fixings or does it just have fixings at the front and the seat holds it in place at rear, can't see any place for rear tank rubbers / fixings regards mark

Hi. Just got a 199A and the throttle seems very heavy and the carb spring quite strong, stronger than I remember. Does anyone know what the free length of the spring should be, the number of turns and the wire diameter. The old twist grip is knackered. Anyone recommend a fast or slow domino right angle twistgrip and suitable cable. Thanks Tony

hi all dose anybody know were i can get my alloy tank restored? its got a crack in the top. im in the north west area

Can anyone help. The Kickstart spring has failed and I have a new one to fit. Can this be done in situ or does the shaft have to be removed? Martin