i believe this is the tool you are refering too? http://home.earthlink.net/~cbradshaw25/id4.html
i just use a set of digital calipers to measer my gap usually i like it around 0.5mm and shim bell off the shoe to around 0.2mm to allow for heat expansion after a few laps. i usually set my clutch spring from 0.8mm to 1.1mm and i measure this from the top of the clutch nut to the top of the spring tensioner.
measuring the spring tension from the top of crankshaft to the spring tensioner will change for each motor depending on shims/type of collet used etc this is why i measure it as i said i do above.
i find this works really well, it does sound a little slippy once you first start off but after the first corner or two there is no issues at all.
i have never tryed increasing the hole size in my clutch fly weights, this is just something that i havent had enough time to do yet
- but i have heard about good results by increasing these to 3.8mm or 4mm.
but if it aint broke why fix it?
this is all for kyosho 3d clutch which comes with RRR/RRR evo cars.
has anyone tryed the new kyosho 2D clutch?