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petorius

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About petorius

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  • Bike
    Evo 250

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  • Location
    Warwickshire, UK
  • Gender
    Male

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  1. I take it you are not married then!!
  2. petorius

    Bultaco yokes

    Thanks everyone for your comments, very helpful. I had based wheelbase measurements on Sherpa sales brochures. According to the brochures all Sherpas have the same 1315mm (51.7”) wheelbase except for model 158, 1290mm (50.7”) and Model 80/91/92 at 1330mm (52.3”) not sure though if this refers to the early 91/92 which I would assume would be the same frame as model 80 or the late frame which I would have assumed was the same as the 124/125. https://www.motoguapa.com/BULTACO/ArchivosBultaco4.html My wheelbase measurement was taken from centre of rear wheel adjustment, with the wheel foremost on the adjusters it is 1330mm, so it would seem all is okay as it is and line with early Slimlines, perhaps with the Alpina clamps it would bring it more in line with later Sherpas. That is a good spot on the yokes being Montesa I did not know what they were from, I seem to recall they had an aluminium dome stem nut which I have managed to lose over time, this has caused me some grief as the stem has a very fine thread, 1mm pitch. I had found some listed on the well-known auction site but when it arrived it was not the size listed; I think I have found one now though. Thanks again.
  3. petorius

    Bultaco yokes

    I guess everyone has their own lockdown projects on the go at the moment. Mine is using up accumulated parts to put a Sherpa together using a late engine in a slimline (91B) frame. I am quite keen to get the bike relatively finished so that I can move onto other things, so far so good except I had some 35mm triple clamps that I thought would be suitable as they had quite a bit of offset but it would seem they have too much. As it stands with the rear shocks measured at 355mm (temporary fitment only to hold the bike together) the wheelbase measures 1335mm (52.5”). Standard is 1315mm (51.7”) on 340mm shocks I believe. Not sure I will be able to get this back by dropping the forks so wondered if anyone happens to have a spare set of aluminium yokes they would care to sell? I do have a set of Alpina yokes, these have no offset and not sure if they would work.
  4. I have just tried this on a 350 Alpina, i had no issues with mine. From what you describe you would have the same issue if you used a standard ball race bearing.
  5. I think that's a bit unfair, okay whatever generation you are it is never easy to justify throwing away money on a luxury item but Chris does make some good points. I am in the older demographic and welll exposed to mechanical shenanigans when i was young, times have changed. I would be doing stuff like bleeding car brakes and changing plugs at primary school age. That seldom happens now, if you are not exposed to mechanical items you are not likely to develop an interest. During the lockdown i have actually been wondering if i really want to continue competing, progress for me is really slow. Having said that i am buiding a Bultaco right now, i may do as Chris indicated and ride twinshock, i may carry on riding my modern or i may just give up completely. Time will tell.
  6. I noticed that earlier today. Looks sweet and original.Good luck
  7. I am not on Facebook and have no intention of joining. I know of several people that have left in recent months. I do actually find it frustrating that many clubs choose to update in Facebook and not update their websites. I come on here intermittently and it is an excellent resource. Having ridden badly for a number of years i am not really in a position to comment on techniques and such like but do take in comments more knowledgable members make. I do like to work on my bikes though and the depth of knowedge has been invaluable. (Woody i am especially looking at you).
  8. Just dug it out, it does have a rustic look.
  9. I might have a spare resistor from an Alpina. I will have to have a look but if you are stuck let me know and i will dig it out.
  10. Funnily enough started making myself an alloy tank to fit inside kit campeon cover this afternoon. Never made a tank before. So far so good, though it has caused me a few headaches drawing it.
  11. Thanks for the info WT, is that a Model 6?
  12. I have been looking at this for a while as i have been considering building a track bike with a 370 motor i have in pieces. Still trying to decide whether to commit though. I had come to the same conclusion regarding the rear hub and losing the kickstart but the sprocket would still be very close to the ignition rotor cover. I notice AJR in Spain have larger front sprockets for the TSS. Would you know if these have the same 25mm splines?
  13. Bing carb floats are quite prone to failing, becoming heavy over time. Could it be this as i would suspect it would be more likely to show up at low revs?The floats are the same as used in BMW CV type Bings.
  14. A couple here in case of interest https://moto-classic.com/bikes-for-sale/
  15. Ahh yes found it, looks like all the difficult to get parts are all there.I am not sure that there was a massive difference between any of the 5 speeds in terms of performance or reliabilty. I am sure somebody here would be better qualified to judge. The motors are all in a low state of tune so differences are marginal. Whatever you buy it will cost you more than you anticipate to bring upto scratch! Or at least thats my experience. Useful link to model differences https://www.motoguapa.com/BULTACO/ArxiusBultaco1.html
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