Jump to content

does this make sense...?


dr-alpina
 Share

Recommended Posts

Hi there, nice that i found this forum and i am not the only Bultaco addict round here...I just wanted to sell a 183 Sherpa i bought for a friend, who didn't want it anymore. When it was standing in my garage, i said to myself: he, thats a really nice bike...It was stored 25 years in a shed and had a real daily driver life before that...I put some air in the tires, brake cleaner in the carb, some fuel and the engine fired up. I could not believe when i made a few rounds with it on our place...and decided, thats my new project, the bike i always wanted to have since i was 18. crazy, and makes really no sense, cause i have three other Bultacos and a montesa trial...

I stripped last week the bike. new tires, wheel bearings, steering head...what is always necessary. but i like the look of the original alloy tank. old warrior or something...so decided, to keep the look, like it is. (with rusty kickstarter...) I liked the patina of the bike. ( ..ok the red pipe...) to be continued...

 

 

IMG_4393.JPG

Edited by dr-alpina
  • Like 8
Link to comment
Share on other sites

 

 
 

Some things I would so:

 

1. Chain tension is too much, there should be a 1cm distance between the upper side of the chain where the chain tensioner sits and the underside of the swing arm.

2. You should mount an chain guard,

3. The rear fender, a used OEM Aluminium fender or white plastic fender would be great...

Link to comment
Share on other sites

 
 

I think both mudguards should be red, not too sure if your rear one is original, can't remember the deep valance.

Has anyone found that the front mudguard clearance is very small (10mm.).?  It is worse if you use a 3.00 x 21 tyre instead of a 2.75 x 21.

.

Link to comment
Share on other sites

 
 

..when i got the engine running, it sounded ok but some times you could hear the piston. After stripping and measuring it had around 0.25 clearance...!

I decided to put a new piston but found another old cylinder with this piston. clearance 0.10...after cleaning it really looked better , but have you ever seen this holes? looks homemade for me and whats the reason?  

IMG_7415.JPG

IMG_7416.JPG

Link to comment
Share on other sites

 
 
 
 

Some models don't have an exhaust port bridge so don't benefit from having holes there.

One of my Bultacos is an Alpina 138. It has no exhaust port bridge, but the only piston I could buy at the time I had it rebored (about y2000) had those holes.

Link to comment
Share on other sites

 
On 12/16/2017 at 2:10 AM, scifi said:

I think both mudguards should be red, not too sure if your rear one is original, can't remember the deep valance.

Has anyone found that the front mudguard clearance is very small (10mm.).?  It is worse if you use a 3.00 x 21 tyre instead of a 2.75 x 21.

.

The front trials tyres we buy now are taller than the trials tyres from the mid 1970s so it should be expected that if you still are using the original mudguard mounts, there will be less clearance

Link to comment
Share on other sites

 

Ok I will try this piston. ...found some details on the bike which are not original, but from the 70ies, the rear mudguard was not original, but M.Robert. Front mudguard NAVA, some italian i think, levers magura, but special short ones. Handlebars are original i think as well as amal throttle. --swing arm was bent, I replaced and converted the brake lever to the right side. finally found a white used plastic mudguard ... thats it for today...

 

IMG_7426.JPG

IMG_7431.JPG

IMG_7432.JPG

IMG_7433.JPG

IMG_7434.JPG

IMG_7417.JPG

IMG_7435.JPG

IMG_7438.JPG

  • Like 6
Link to comment
Share on other sites

 
  • 2 weeks later...

Hi again, last week I put together the whole stuff. the plan was to finish that project this year. I have put on the replace cylinder with the piston i found in my shed, new tires, oils, chain, front sprocket 11, new dellorto carb 28, new grips, filter element,new gas shocks, new chain guard alloy, rims blasted with glass pearls, the rest cleaned up.

..and it runs great. The engine goes very smooth and powerful.

here some pics of the project...totally worn slide from bing, new Dellorto (would never use Bing again) ,upper frame connection without hole (forgotten at the factory), left side nearly finished, right side with brake conversion, worn footpads before and after welding,

and last not least ...first run outside. wish you all a Happy new year...

FullSizeRender.jpg

FullSizeRender.jpg

IMG_7437.JPG

IMG_7441.JPG

FullSizeRender.jpg

FullSizeRender.jpg

FullSizeRender.jpg

IMG_7450.JPG

FullSizeRender.jpg

FullSizeRender.jpg

FullSizeRender.jpg

  • Like 7
Link to comment
Share on other sites

 

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
  • Create New...