"Sat Tara S. Khalsa" wrote:
>
> Hi,
>
> Interesting problem. It appears that you're correct in your diagnosis of
> airflow to the intake being disrupted by your leg position, since the
> problem doesn't occur with the tank cover removed or legs back. The
> Tourmaster places larger airflow demands on the system than a stock
> displacement motor, so the stock configuration may be taxed by increased
> demand.
>
> In terms of too lean or too rich, if the above theory is correct, it
> wouldn't be either. It would be the appropriate mixture - just not enough of
> it to support combustion, sort of like putting your hand over the carb
> opening. (although with a CV carb it may open the slide more due to creating
> greater upstream vacuum.)
Thanks for the insight, Sat. My thinking was that if my leg position
forced more air under the tank cover, it might have a slight "ram air"
effect, which I assumed would make it a little leaner. If you're
correct, my only option may be to get bigger carburetors. If I can't
adjust it out with jetting and needle changes, I may resort to that (Oh,
darn, another 10 horsepower... ;)
Gary Rathbun
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