Bultaco

Bought a 250 model 198 and was just wondering if i could convert to a 325 or 350 ? Is the crank longer stroke or is it just bore? I know the weight on the end of the crankshaft and the flywheel are different but can you convert or is it more trouble than it's worth?

Thanks to Woody's suggestion i contacted John Collins about 2nd hand barrel and head for my 191,he's pretty sure he can sort one out for me.Can someone tell me what the Standard bore is and what the oversizes are please.

Hello, I'm just returning to owning a trials bike after a gap of 30 yrs or so! Yesterday I bought a Bultaco that has also been away from the sport for a similar amount of years. The bike has frame number B 9202989 and engine PM9101464. The frame has the aluminium bash plate instead of bottom tubes. The tank and seat/side panels are one piece molded with ribs on the side panels. I'm not too worried if the bike is a bitsa but would welcome any info on what I've bought.

hi all can anybody tell me is the 325 sherpa engin a 350 or is it a 325? its a 1974 with the oval shape magneto cover ive read some peapol call them 325 but they or 350s

hi all just got a rough 199 to rebuild and am having a nightmare getting the swingarm spindle out .wd40 and a big hammer have just mushroomed the end. am i missing something (brain) or is there a trick to get the bugger out?

hi all is there anything to stop the side stand spring damaging the paint on the swing arm?

Hi, I've recently brought a 1978 Sherpa and it's on standard sprockets 13/46 and I think it's a bit too tall for trials. Any suggestions on better sizes? I will need to buy chain and sprocket set, so want to get it right first time. I hope someone can help.

Hello to all - Looking to get a Sherpa to do some AHRMA trials. Any real differences between them besides cradle, swingarm ? Always wanted the blue 199a but seems there are couple nice 199's floating around and I'm a spode newbie on a trials bike. Thanks to all for your help

hello all im thinking of fiting a decompresor to my 199A or they worth having or ham i just wasting my money?

Hello there, Besides the links posted on the video's forum I am also posting this video links on the Bultaco specific forum, in case someone has missed them. I hope it is ok with the forum administrator. Having the sound on is a must. Recorded in Central Spain. Hope you all enjoy it. cota200 Bultaco 199A - Jazz & Classic Trials Bultaco 199A - Swing & Classic Trials

hi all as anybody used magical fork springs? ive just got some and was woundering witch way they go? daft question i know but one end of the spring is coiled tighter than the other i aso got the preload fork caps there is intructons but only tells you how to set the preload caps

hello all has anybody tryed the upgrade fork seal witch or on ebay ?

Hi where can I buy a set of back wheel spokes and nipples for my Bultaco 198 ? have tried IN MOTION (Bultaco uk) but they are having problems with spoke lengh ! and they cannot tell me when they will be available ! Since I have been waiting since mid December I am getting a bit hacked off and wondered where else I can source them. Any help will be much appreciated. Ian

Hi I have a M159 Bultaco 350 and have consulted both Haynes and Clymer manuals Please can anybody give me a tip for removing the following bobbin that has attached itself to the crank, presumably with the O ring that appears to have died inside it? This bobbin is not mentioned anywhere, but I assume is common as the steps in the crank at this end appear common to more than the 159. Also, please confirm: 1. Remove bobbin 2. Replace O ring (about an inch in diameter) 3. Replace seals in carrier 4. Replace bobbin 5. Replace weight and re-assemble the rest of it etc.. It's just No 1. I can't find any reference to and am struggling to remove! Cheers Mick

hi all i have to verry good 199A they just need puting back together all the hard work as been done im thinking of selling one how much do you think it would be worth?

I am currently getting my 158 ready for registration and need a copy of the wiring diagram for this model. I have others that are similar but not the same. I assume the 159 wwould be the same. If anyone has one that they can email me I would really appreciate it. Regards Drew

198b mint,just sold on e-bay for

Does anybody know where I could watch this video: http://www.zonatrial...sp?codigo=1575. It does not seem to be online anymore. Thanks.

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, i'm new to the forum and as of last sunday the proud owner of several boxes containing most of a 1977 Sherpa t350 ( 191 ).The first question is what colour should it be? The Tank is red and the frame is silver but the fork legs and airbox are blue.The bloke i got it from had bought a pair of sherpas with his mate from the same man and had one each.Mine has matching numbers but i know the engines were in the wrong frames when they got them so its quite likely the other bits were mixed up too. The frame number is JB-19100600.Any help would be appreciated.