I was hoping someone might have a suitable pedal in a box somewhere. Alternatively I was hoping to find and modify a Bultaco road bike pedal.
At this stage any photos and dimensions would be good and, given previous owners modifications I would also be very keen on photos and dimensions of the frame brackets for the brake pedal pivot and side stand pivot.
I have been lucky enough to purchase a 1968 Bultaco Sherpa Model 27. It has not run for 15 years and needs a full rebuild.
The previous owners have made some odd modifications such as mounting the stand on the left side and looks like they were going to have the brake and gear change on the right side.
At present I am trying to collect the correct parts to put the bike back to original.
One item I cannot find is a left side rear brake pedal.
I know some new replacements are sold with a serrated pedals like a more modern bike but the original has a solid pad more like the brake on a normal road bike.
The length is short being 175 mm (7 inches) from the centre of the pivot pin to the centre of the foot pad.
I assume you are suggesting swapping fork legs in the existing triple clamps. From what I can see the fork legs on 250 and 350 are both 36 mm so you should be able to swap them out.
Kick start levers also look to be the same. Note there are two versions. Steel for most, but aluminium for bikes originally sold in Japan.
Looking at the codes in a 350 parts book suggests the following differences between 250 and 350:
- Cylinder, cylinder head, piston and gaskets.
- Reed valve. It looks like only the stops are different.
- Carburettor jets and float? Same carb body though.
- Stator and flywheel.
- The lower fork triple clamp. Unsure of the difference here but the part number is 350 specific.
This link is for a 2004 parts manual. Basically the same bike.
What is good about this parts book is the 4 digit part numbers are Scorpa parts, but the longer part numbers, at least for engine parts, are the Yamaha part numbers.
Just put a new clutch in mine and the plates, bearing, and gasket were all ordered through my local Yamaha dealer.
Unfortunately this does not apply to fork tubes and one of mine is needing replacement.
Thanks spud 1968, Woody, and bilc0, for your replies.
The forks on my bike are 35 mm and I had put 190 ml of oil in each leg based on the Fantic 200 manual which I have a copy of.
But the manual dates from 1980 and the bike from 1983.
I now realise the 190 ml may be for the 32 mm forks and perhaps 220 ml, as suggested, is for the 35 mm forks.
Looks like I simply did not put the right amount of oil in each leg.
I will try adding oil during the weekend and see if this reduces the bottoming.
I would be interested if anyone knows the original fork spring free length to determine whether they need preloading or spring replacement. There is enough free length that even with a short preload spacer they won't coil bind, though the extra oil may be enough to stop the bottoming, as otherwise I am happy with the fork movement.
Bultaco Model 27
in Bultaco
Posted
feetupfun,
Thanks for the reply and kind offer.
I was hoping someone might have a suitable pedal in a box somewhere. Alternatively I was hoping to find and modify a Bultaco road bike pedal.
At this stage any photos and dimensions would be good and, given previous owners modifications I would also be very keen on photos and dimensions of the frame brackets for the brake pedal pivot and side stand pivot.
Regards,
Peter.