[Shep]

Usual cause are the carburettor Air-Cut-off valves.You can get replacements or bypass them with no ill effects.

You leave the mechanism in and block the small hole where the tiny O-ring would go at about 7pm/8pm on the picture.

 

[Shep]

Many thanks to all for such quick responses.

Nolavox -- at the wrong side of 60 I don't think I'll be blasting down any road towards a hairpin more likely tortoising towards the nearest public convenience as my bike and I will be doing about 3 pisses to the hour I'm in the UK incidentally and just realized I'm on a US site. The advice you all give and your knowledge levels are excellent. Look forward to solving my problem, probably after severa hours of cursing

Regards

Kenny W

Although this is a US based site it has international membership.Put where you are in your Signature or under your avatar.I live in Hull,East Riding of Yorkshire