Hi All, Went out for a spot of green laning yesterday on my Sherpa T 191. There was quite a lot of road work involved which meant trying, and failing, to keep up with my mate on his 1950 Norton 500 T.
Heading back after a couple of hours my clutch was getting grabby and throttle response was jerky. Then engine lost power and died. All compression had gone so had to push it home. I've left it overnight and although I haven't attempted to start it, there is compression now.
I know it's geared for trials so top speed about 30mph but does anyone know why it would lose compression?
I do need the truth to be told. I will be buying it mostly unseen as it's a 200 mile round trip to where it's located. They have been honest before and they are enthusiasts themselves. I'm looking at £800 as it stands and they've promised to try starting it and send me some pics later today so I can find exactly which model it is.
I'm reasonably handy with the spanners and would do all the work myself and it would be either as a little project for me that hopefully wouldn't lose me money although if I prefered it to the Sherpa I may keep it. I don't want a showroom piece but a working bike to have fun with in not so sunny Cornwall.
Thanks for the warnings. I was going to presume it would need the motor rebuilt as the crank seals would be likely to need replacing at the very least.
I've just emailed them and I'll chase them up on Monday.
I'm hoping it's going to be a possibility as I'm looking forward to it. Had the Bultaco from them ( The Twinshock shop) last year and they were pretty honest as to its faults.
Hi, I bought a Bultaco 350t Sherpa last year and after many hours of knuckle grazing managed to rebuild and get it road registered. I'm now taking my first tentative steps in trials riding.
I've been offered a Montesa/Honda 348 as a project at a reasonable price that will need some work.
I'm not sure of the age or anything. Are parts readily available and are there any pitfalls I should be aware of?
I learnt a lot with the Bultaco and this forum was huge help so any advice gratefully accepted.
All done. I couldn't have done it without all your help, Thankyou.
I eventually managed it with a pair of needle vice grips levered against the shaft, I had cut a little off the tang, then a cable tie to pull the "hook" end anti clockwise past the case and back to its stop.
Cheers Bondy, Just managed to get it in but wondering if I need to position the shaft with the chamfered end of the hole facing down so when I wind it back it will add tension?
Thanks Graham, So I cut off 5mm and put the spring on the shaft. Just "pop" the long bit into the hole in the shaft and give it half a turn of preload then Bob should be my uncle?
When you say you can do it in 5 mins, does that mean it is a regular thing to do?
I have 10 46 gearing is that ok ballpark for trials riding, I am a beginner. Thanks
FYI Mine has 10/48 fitted and it idles in first at far less than crawling pace which will make tight sections easy but I do hold up the traffic with road work !
Who can rebuild these engines or at least the crank? In Motion only supply bits now.
Is there only In Motion for parts?
Anyone to recommend for a rebore?
Will probably do bottom end myself unless can find someone to save time. Thanks.
I spoke to MYMotors and they said by all means post them the parts and the crank and they will get it done for you by the bloke who did mine (also re-bores) but you may find a local engineer to you who would do it without the postage. Alternatively have you asked Dave Renham at inmotion if they had someone local to them who would do it ? You could just post the crank to them then? Just a thought.
Anyroad, Let me know what you decide and if I can help sort anything out this end I'd be happy to.
Cheap it 'aint. Mymotors have some old stock which they let me have for original price so a complete gasket set was £19 even though I told them it should be £30.
The bike cost me £800 and I was told the crank was rumbling. If you can run to electronic ignition I would recommend it. Turned out both the crank bearings and mains were shot.
Couldn't tell you I'm afraid, just starting out myself. Literally just got it running properly yeaterday after an engine rebuild. Done a few road trials in the chair of a 1950 Norton and thought I'd like have a go myself.
taken yesterday after getting the idle sorted. Electronic ignition fitted and airscrew adjusted. Starts beautifully and sits and ticks over like a dream.
There's loads of more knowledgable people on this site.
Overheating problem?
in Bultaco
Posted
Hi All, Went out for a spot of green laning yesterday on my Sherpa T 191. There was quite a lot of road work involved which meant trying, and failing, to keep up with my mate on his 1950 Norton 500 T.
Heading back after a couple of hours my clutch was getting grabby and throttle response was jerky. Then engine lost power and died. All compression had gone so had to push it home. I've left it overnight and although I haven't attempted to start it, there is compression now.
I know it's geared for trials so top speed about 30mph but does anyone know why it would lose compression?
Cheers.
Neil.