Hi All,
I am having some trouble with my 1961 Hawkstone Scrambler and wondered if anyone out there can help me shed some light on the problem!!!
My bike has the Vale-Onslow iron barrel type engine fitted and is constantly overheating and seizing up, even when just running on tick over - it started to seize up on the start line on Sunday!!! Below is a list of things we have changed/modified/tried:
New crank seals fitted
electronic ignition sent away and tested (all OK)
3 different carbs have been tried (2 concentrics and one monobloc)
raised cable needle to its highest setting
increased main jet size right up to 300
increased oil/petrol mix gradually from 25:1 to 16:1
replaced inlet gaskets (no leaks has been pressure tested)
someone suggested to me that it could be the exhaust but it is the same exhaust I have had on it ever since I've owned it!
ANY SUGGESTIONS???
Many Thanks
I am having some trouble with my 1961 Hawkstone Scrambler and wondered if anyone out there can help me shed some light on the problem!!!
My bike has the Vale-Onslow iron barrel type engine fitted and is constantly overheating and seizing up, even when just running on tick over - it started to seize up on the start line on Sunday!!! Below is a list of things we have changed/modified/tried:
New crank seals fitted
electronic ignition sent away and tested (all OK)
3 different carbs have been tried (2 concentrics and one monobloc)
raised cable needle to its highest setting
increased main jet size right up to 300
increased oil/petrol mix gradually from 25:1 to 16:1
replaced inlet gaskets (no leaks has been pressure tested)
someone suggested to me that it could be the exhaust but it is the same exhaust I have had on it ever since I've owned it!
ANY SUGGESTIONS???
Many Thanks
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