YS 1.40 Sport

[JonAlan Wise]

Buddy, Can you explain this fix? I have a new 140 sport that has this
problem. I called YS Performance and talked to them about it they told
me this was the fix. I told them I would send it in but maybe I could do
it myself. Could you explain? Thanks Jon Wise

BUDDYonRC at aol.com wrote:

>  BobThe 140-Sport is stronger than the old 140-FZ, It has the 140-L
> Carb, Piston and the new rotary valve now used on the 140-DZ they have
> gone back to pressure through the crank shaft to the diaphragm which
> also improves lubrication to the cam area similar to the old air
> chambers the only problem we have seen, and there are five of them
> being used locally is that the hole in the throttle barrel on the low
> end side needs to be drilled out to 1/8" diameter to eliminate the mid
> range from loading up. we are running Magnum 1-1/2 fuel, 16x11APC and
> turning 8400 to 8800 two of these are on Temptations and two on my
> original designed Eagle One Larry Mercer was third in Advanced at the
> Nat's with his.Buddy Brammer
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