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Hi,How much did the sherpa engine change between 1971 M-80 and later models 72 on? In particular internals ie clutch gearbox etc?
Cheers
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Thanks mate, will do that tomorrow p.m.
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Hi, barrel and head now removed, piston is badly pitted on crown and small end bearing appears to be the problem. There is no vertical play on big end but some lateral movement on con rod. The piston is stamped "73" is this standard bore or oversize as i cannot see any + figures. Any advice welcome,
cheers
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Thanks Wayne, will get barrel off at weekend and post findings then,
Myson
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Hi, got her in bits and removed cylinder head to check bore etc. I noticed that I can rotate the piston in the barrel several degrees. every thing else looks clean, no score marks etc. Is the small end bearing shot or is it normal. I have tried to ease barrel away from cranks but I dont want to use to much force. Any advice gratefully accepted,
Cheers,
Myson
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Never mind I was going to buy new anyway, your help is invaluable to us novices and much appreciated,
Thanks
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I will take that as a yes Wayne! but for the sake of a tenner I will probably buy new from Bultaco UK as you spend so much time helping people like me on the forum, many thanks,
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Thats good news Wayne. I will replace bushes anyway with correct ones from Bultaco uk. Do you think a new spindle made from 12mm stainless bar would be ok?
Cheers
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Sorry about delay in reply Wayne, work interferes with important suff sometimes. The bushes are as you describe and bronze, cheers
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Had a look in a copy of a manual(for Alpina so similar to Sherpa) I have and there were two types of swinging arm fitted one had a one piece tube across (Mod 49 type?)between frame and the other was two short tubes. Mine has the one piece and it looks like the 12mm spindle just runs through the bush without any outer bushes. Has not been modded in any way as I can see the bushes in the arm,
Cheers
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Thanks again for help, will pay attention to everything you mentioned. I am replacing the spindle as threads are ropey, is it worth renewing bushes while it is stripped down to save work later? When you say outer bushes I can only see one set which are in the swinging arm, not like later models that have two sets.
Cheers
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Cheers, M-80 only has one set of bushes from what I can see, pressed into arm. Do you rekon its ok to leave them in and tape over bore?
Thanks
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Hi guys, i am continuing with the restoration of my M-80 and am looking for guidance on removing swinging arm bushes prior to grit blasting and powder coating frame and swinging arm. Any tricks or tips? By the way is
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Hi There has just been one listed on ebay today, worth a look,
Myson
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Do you want to rebuild it or sell it as a project?
Cheers
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Do you want to rebuild it or sell it as a basket case?
Cheers
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Thanks for all the advice, looks like its out with the tin opener one night, good job my son is a welder and has access to tig so he can do a neat job for me,
Cheers
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Hi the baffles in the mid box have came loose inside the mid box, any ideas for an easy fix. It also has a strange after market tail pipe do you think this will effect performance.
Once I have cleaned and repaired the exhaust does it require any packing?
PHOTOS
http://s810.photobucket.com/albums/zz27/my...before%20start/
Cheers
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Cheers for advice, like the idea of running a 2 stroke and thinking of the environment, or is it cos its easy to wash out the filter!
Myson
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Hi, for any one wanting info on MOT for daylight use or in general have a look here, its very informative,
MOTs
Myson
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Cheers, I think i will just invest in some filter oil,
Myson
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Hi, there seems to be many opinions on this,I am just wondering what you use. I know that I always used filter oil on my motocrossers but others used 2 stroke oil engine oil or gearbox oil.
#What do you think?
Cheers
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Once again superb support, thanks for the info regarding frame I will look into it,
Great forum
Myson
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Thanks Sunny I dont suppose interpol would be interesterd so why not, if you dont have a problem then you could PM me the number, if anyone can see a possible downside please let us know,
This is much appreciated mate,
Myson
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Thanks Wayne, I will hang on for correct frame or at least a number I can use, If you see one even a scrapper would you let me know?
most grateful for your help.
Myson
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