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Bultaco Sherpa M190 Rebuild Finished


d250b
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Happiest chap in Bultacoland today! just fished my first rebuild of anything and it happens to be the type of bike I obsessed over 30+ years ago and could never have! The only thing I didn't do was split the engine.

The amazing thing is it actually goes and seems to go quite well! round the yard at least!

so by way of saying thanks to everybody on here who has patiently answered my many questions, heres a couple of pics.

I've also had great help from the chaps at Inmotion as well as John Collins in Wales and honestly, without the help of guys like them and the knowledge on this forum I'd never have managed it.

the bike was built to be usable, not a thing of perfection/show pony. The only major components that I had to change were the rear shocks and the front fork tubes. It had many issues but now, hopefully they've all been put right and she's going to last for a good while yet! not to mention hammer home the fact that I'm 30 years and several stones too late in doing this:-))))) but what the heck......... :thumbup:

David

post-18858-0-37228800-1409492758_thumb.jpgpost-18858-0-78604100-1409492856_thumb.jpg

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A good job well done, enjoy competing with it. The colours are just perfect to my eye, same with the fit of the mudguards.

Some suggestions for you but please do not think that I am being critical I am just trying to help,

The rear chain looks a bit too tight, slacken off the rear chain so that you can place your thumb between the top of the chain tensioner rubber block and the underside of the swinging arm tube.

Re route the clutch cable in front of the top yoke.

There appears to be two cable ties securing the front brake cable to the upper fork chrome tube, remove these and run the cable ahead of the yokes then when the forks compress the cable will not kink.

It is always a good idea to support the bike with the wheels clear of the ground then turn the steering left and right whilst checking to see that the cables move freely without getting trapped or kinked.

Edited by trialsrfun
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Thanks for the comments folks its been a really satisfying job doing that and I'm desperately looking forward to getting started riding.

The photos maybe flatter a wee bit though, the wheels are far from perfect but I simply couldn't afford to do them up properly; then again as I said she for riding not display. Need 2 new tyres too but again finances............... some day!

trialsrfun/pschrauber, thank you, appreciate your advice. I'm totally in the dark about a lot of this stuff and thats the sort of thing that really helps.

I will get those things sorted. The tensioner spring is a bit tired so this might mean another purchase!!!

I tried to be cute with my cables....i thought it would be a good idea to use heat-shrink tubing on the electrics coming out of the casing to prevent water getting in. This seemed to work fine although the cable is a bit 'kinky' on the way up to the tank but just cosmetic. Both my throttle and clutch cables were pretty hard up and rubbed down to the metal in places so I thought it would be an idea to do the same to them and save having to buy new ones. It's tidied them up a lot but the clutch cable is now a bit stiff and bulky (despite this I've got a very light 1 or 2 finger pull on the lever though).

Front brake cable didn't get the shrink tubing treatment but I will sort out the routing. You might notice Ive held it to the mudguard stay with a cable tie; i bought the proper wee metal guide for the fork leg but I'm damned if i can find it...........

heres a pic of the tubing on the electrics in case it looks like a good ideapost-18858-0-25829400-1409593006_thumb.jpg

thanks again

D

Edited by d250b
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thank you!

ok just been out to try and slacken the chain tension. I can't get the back wheel far enough forward because the brake cam hits the end of the swing arm.

Pschrauber you said i might need to mount a half link so I'm assuming I need to lengthen the chain??

EDIT

ok just checked the inter web and see the 1/2 links, so thats self explanatory. off to youtube now for some instruction! should have done the research first!

D

Edited by d250b
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thank you!

ok just been out to try and slacken the chain tension. I can't get the back wheel far enough forward because the brake cam hits the end of the swing arm.

Pschrauber you said i might need to mount a half link so I'm assuming I need to lengthen the chain??

This was my intension, with a half link you will get additional three rollers which seems to me (looking at the photo of our bike) to be then the right length. (two seems to be not enough and four rollers might be too much again. See here (same model):

Bultaco%2B-Courtard%2B02.jpg

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Hi David, Yes I know what you mean It can be a common problem. A half link is actually one & a half links long with three roller pivots in its length. The sides of the outer link are cranked or joggled so making that link as wide as both he inner links and outer links.

Links for some makes of chain do not suit other brands so try to get the same make if poss. Worth it to get the bike set up just right though.

Edited by trialsrfun
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Great, Thanks!

I'll check the chain and see if there's any name etc on it; I didn't renew it so I've no idea what it is. I wonder if, for the sake of £26 (drop in the ocean now :hyper: ) I should just get a new chain?? if I did should I get the extra half link with it at the same time. Is there a way of working this out like numbers of links?

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