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If sourced from another supplier do you go for nitrile or vitron o rings for longevity? I am just in the process of buying new o rings from a local shop for a carb service. The cam shaft ones of course would not be in contact with petrol.

Thanks for confirming that Barry, I was sure I had read it somewhere. I do have 2 pairs of old springs which I will check their lengths. Otherwise unless there is another source for closer spec springs I will probably stick with the newer springs if the don’t cause any engine problems. When riding I...

Hi all. I have’nt come up with a definite reason for my problem seeing the timing marks but i did manage to adjust the can to get the fully advanced Z mark in the correct position , but the Z showing on low revs at idle is still perplexing . I did check the timing gun and its fine . The bike is on t...

Hi , Sorry I forgot to add that I had connected the bean can shaft to a drill to test the advance weight as shown in the attached pic. ( The example in the pic is a scrap unit ) Anyway I think I might know the problem .I might of fitted the offset camshaft attachment ring shown in the pic , 180 deg ...

Hi Rob, The strobe is a Gunson Tachostrobe ,old but it has worked ok in the past . It connects to the battery with 2 croc clips and signal wire / connector which attaches to the top of the spark plug and then the plug cap. The led hall tester is one I made years ago with a led bulb / resistor and 9v...

Hi Rob, I have just connected the shaft of the bean can ( without the outer case ) so i can see the advance mech rotate at speed . The bob weights spin out and return back perfectly without any problem . On with the investigation !

Hi All, thanks for your input. As you say it does seem to point towards an issue with the advance mech. I decided anyway to have a look at the alignment of the crank/ cam sprockets any they are fine , plus the cam sprocket wear which does’nt look too bad. I stripped down the bean can again and could...

Hi All, I have an problem setting the timing on my R80g/s and just wanted some advice before i start stripping any parts off. The bike has clocked 162000 mls which i think is relevant to issue. I have recently stripped the ignition bean can to check/clean/lube the advance unit and fit new springs .P...

Hi Barry, Thanks for the offer of a second opinion , I would appreciate that. I had already stripped the forks down and cleaned the internals . Just need to re assemble them without the main springs fitted . Will assemble the right one with the top out spring fitted , and the left fork without it in...

Hi Barry, I have recently joined this forum and found your posts about fork damping really detailed and informative , giving me the incentive to try and sort out( again)the topping out noise on my 1982 80g\s . I have had the bike since 1983 and its now covered 143000 mls. Just need to ask some quest...