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Old 12-18-2011, 07:04 PM   #16
welder
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this thread would be appreciated more in the trials forum
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Old 12-19-2011, 01:26 PM   #17
PSchrauber
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Quote:
Originally Posted by welder View Post
this thread would be appreciated more in the trials forum
The OP should post more pic's so the very nice dirt bikes of Bultaco will draw crowds as the Metrallas are doing.

Sadly only a few bikes get a real overhaul in technic and appereance, (I do believe in shiny dirt bikes, very necessary in my view to clean them up after a play in the mud).

PSchrauber screwed with this post 12-30-2011 at 09:27 AM
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Old 12-30-2011, 09:27 AM   #18
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A long not ridden but stored one:

Any updates?
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Old 12-30-2011, 09:49 AM   #19
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Hugh is the guy to go to for parts: http://www.bultaco.com/
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Old 12-30-2011, 12:00 PM   #20
bmwblake OP
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is that actually the stock shifter? i thought for certain someone had bodged one together for my bike but it looks just like that one.

last night i kicked it over again and let it run for a bit. i need a less holiday filled time to get some work done. i spent last night tearing apart a ke125 with a friend for his project.



Quote:
Originally Posted by PSchrauber View Post
A long not ridden but stored one:

Any updates?
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Old 12-30-2011, 02:39 PM   #21
PSchrauber
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That is the stock shifter (long version), there was too a short version available, last but not least there is also a version short with foldable pin still availalble. Mmmh look up my pic stack now, if I have ...

Here the long version, the lever on the right side,
(additional parts are the bolts, nuts, ... after replating, rechroming,...)


The short shaft, (in the middle):


The gear shaft with foldbar pin, (the upper one, (lower one is Husqvarna):


For the longer shaft you need to lift the foot for gearing up or down, with the shorter one you can still stand on the pegs, (actually I have small feet, ... )
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Old 12-30-2011, 02:59 PM   #22
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... )[/QUOTE]


Those are some seriously small tires......
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Old 12-30-2011, 05:10 PM   #23
PSchrauber
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Quote:
Originally Posted by One Less Harley View Post


... )

Those are some seriously small tires......[/QUOTE]

Sometimes my brain have ultra long wires as we say here, do you mean the rims, (18'' and 21''), or the rubber on the gear shaft?
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Old 05-15-2012, 12:03 PM   #24
PSchrauber
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Quote:
Originally Posted by bmwblake View Post
i picked up a 1979 sherpa t 350 from a local rider and fellow adv guy. it had been sitting around his place and wasn't doing him any good, so i thought it would be a good candidate to distract me over the winter. i know nothing of trials bikes or bultacos so i'm sure this will be interesting.

here's an old pic from the PO:


and a pic as she sat last night:


i finally got the giant nut off that has to be removed before you can insert the flywheel puller. it was stuck in a grand way.

last night i was able to clean up the points and get a clean spark. now i need to tear into the mikuni and clean it up. i have good spark but a good round of kicking with the choke engaged leaves me with an overflowing carb and a dry sparkplug.

here's the goody shelf. the tank looks great except where the petcock mounts. i have some ideas for replacement tanks, but i may try and salvage this one first.


What's up with the bike, ... please ... ?
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Old 05-15-2012, 04:58 PM   #25
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the bikes in the same spot it was a few months ago. i've been working on an r50/5 and haven't gotten back to the bultaco. i need to get it running to get it out of the way in the garage.

it runs, i just need to get the gas tank and a few smaller items worked out.


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Old 09-02-2012, 11:42 AM   #26
bmwblake OP
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this bike's been lingering for a long time. certainly overdue for an update.

there've been a few nights of this:


new fork seals are in. it's fun to have such a light bike that you can easily roll it over the lift sideways to get the front end off the ground.

i got ready to start the bike last week and it hung like it was at full throttle. i'm sure the neighbors hated me. the new kill switch came in handy when i found out that you can click the bike into first while kick starting if you aren't careful. nobody was harmed in this event. i wish it were on video. i'll forever be starting this bike with the front brake firmly applied.

the biggest challenge on this bike has been the tank. i mentioned before that someone had at some point overtightened the petcock mounting bolts and stripped the threaded studs that are inserted into the bottom of the tank. it was then somewhat repaired with jb weld and various other bits of goo.

here it is during the cleanout process:




i had to cut out all the jbweld, then borrowed a plastic welder to repair the tank. i heated some nuts and sunk them into the tank where they needed to go. i shaved some plastic off the underside of the tank and that welded very well to cover the nuts and provide strength. i then used some new PE rod to weld more and then sanded to provide a smooth surface.
i used some sealant around the bottom of the petcock after mounted as a final measure.

it's not good enough. after a short round of riding on the bike the tank is leaking again where the petcock mounts. back to the drawing board.

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Old 09-02-2012, 11:58 AM   #27
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I've never heard of anyone who has succesfully repaired one of the plastic tanks. The Italian repro tanks look original and seem to work fine.
I have the original tank on mine. It's for riding, not show. Here's a photo to keep you inspired.
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Old 09-02-2012, 12:44 PM   #28
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Quote:
Originally Posted by bmwblake View Post
this bike's been lingering for a long time. certainly overdue for an update.

there've been a few nights of this:


new fork seals are in. it's fun to have such a light bike that you can easily roll it over the lift sideways to get the front end off the ground.

i got ready to start the bike last week and it hung like it was at full throttle. i'm sure the neighbors hated me. the new kill switch came in handy when i found out that you can click the bike into first while kick starting if you aren't careful. nobody was harmed in this event. i wish it were on video. i'll forever be starting this bike with the front brake firmly applied.

the biggest challenge on this bike has been the tank. i mentioned before that someone had at some point overtightened the petcock mounting bolts and stripped the threaded studs that are inserted into the bottom of the tank. it was then somewhat repaired with jb weld and various other bits of goo.

here it is during the cleanout process:




i had to cut out all the jbweld, then borrowed a plastic welder to repair the tank. i heated some nuts and sunk them into the tank where they needed to go. i shaved some plastic off the underside of the tank and that welded very well to cover the nuts and provide strength. i then used some new PE rod to weld more and then sanded to provide a smooth surface.
i used some sealant around the bottom of the petcock after mounted as a final measure.

it's not good enough. after a short round of riding on the bike the tank is leaking again where the petcock mounts. back to the drawing board.


Why not machine a tubular threaded fitting with you can fit through enlarged tap outlet hole from inside the tank, which with o-rings either side and secured with a nut on the outside should mean leak free fuel outlet? All you need to to then is plastic weld up the previous mounting holes completely, and fit a tap with female thread onto your new mounting.
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Old 09-03-2012, 12:53 AM   #29
PSchrauber
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Yep,
the petcock and gastank is a real task for Bultacos, just to be sure as these little parts where often forgotten,
do you still have the little oil seals around the fastener screws of the petcock?

Set up shown here in the picture, (on the bottom of the right side).

You can get an fiberglas or aluminium gas tank too, these neeed in standard outfit, M14, 1,5mm petcocks,
(some replicas might have different connections), these old M14 petcocks with 1,5mm threads shown
in the middle of the photo.



The alumium tank was fitttet to model 158 and 159 if you want to look up one from E-Bay or Craiglist,
in UK Bultacos had to have an metal tank if they had an road registration so best chance to get one
is UK, (there where also steel gas tanks made, (much heavier!)

Here is a 159 aluminium gas tank I got from E-Bay, still have to get rid of some dents and a paint job
as my bike is white/blue:


The glasfiber tank isn't bad too as you also can fit a custom paint job to the tank, (here the classic
paint scheme for "pimped" Sherpas, (emblems not fitted as the paint was to new when the photo
was taken):

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Old 09-03-2012, 09:32 AM   #30
lamotovita
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Another thing to consider.
I believe the alloy tank requires a different seat to fit properly due to a different tank shape.
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