Hi Guys,

I've run my JP FX in and tuned it to the best of my ability (needs some practice, I think!). What surprised me however, was that the gap on the throttle barrel wasn't very big - I see figures of 0.5mm to 1mm often quoted.

My engine is running @ 108 Degrees C after a good 10 laps of hard running. When release the throttle trigger after a flat out section, the revs go to idle relatively quickly (i.e. don't stay high for a few seconds - which I think indicates LSN too rich) and the revs don't increase.

I've used the pinch method (i.e. pinching the fuel inlet tube) to see if the engine is running rich or lean. When I pinch the tube next to the carb inlet, the revs rise for 0.5 to 1 second and then die off pretty quickly. This should indicate an ok tuned LSN, no?

Have a look at the pic attached, you can see my idle gap - let me know if this is ok. BTW: Normally the insert is in, I just took it out to let you see the gap better.

Cheers, Mark.