Sat, 12 Jun 1999 14:31:09 +0300 - Message No. 5845
From: "Spyros"

Subject: Re: problem with motor at higher speed


I suggest you check the fuel mixture at high speed!

Find an open country road,fit your bike with new sparking plugs,and ride
your bike for about half a mile at full throttle.At the end of the test
,close the throttle ,declutch the engine and switch it off as soon as
possible.Check the plug electrodes carefully and note their colour.If the
main jet is well ,the plugs will be an even tan(brownish)colour indicating
that the mixture is correct.If they have a blackened,sooty,appearance the
mixture is rich asking for a smaller main jet.If they are whitish-grey the
mixture is weak and asks for a bigger main jet.The engine tends to run
hotter in this case and  can be severely damaged.

If you are sure that the carburetors function properly,you may check the
ignition(is the timing advancing correctly?).Other likely causes are burnt
or maladjusted valves.

P.S Have you noticed any problems with your fuel consumption?

Wish you luck!!
Spyros




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