Originally posted by Taylor-Racing
I'm all for getting the weight down low but have been concerned with the header contacting the side belt, so haven't done anything - we want to use the full overdrive 25T pulley and really don't like to crank down on the tensioner too much.
How high are the Mugen engine mounts?
What's the diameter of the FW-05 flywheel? - the FW-05 uses the same 3D clutch, otherwise, yeah?
It seems to me we actually need a longer side belt - maybe a job for Course-R.
I would not worry about the belt rubbing. Mine rubbed for over 1 year without failure. With the 25T pulley the rubbing is even less.
The stock V1RR mounts are 17mm (I think) the kawahara V1RR mounts are 14mm (and they cause rubbing on the 27T pulley) and the Mugen mounts are 13.5mm (approx).
The FW05R clutch is identical except for a 33mm flywheel (which is required for the lower mounts). I would not recomend getting the Mugen mounts unless you feel like cutting the chassis as the bell rubs. Note that the 5 star lightened bell does NOT rub as it appears to be marginally smaller.
You will really notice a difference in these mods. The throttle response on the 5 star bell is quite stunning if you use the lightened 3 racing flywheel as well. I actually thought that the motor was faulty initially as it just sounded "off". You will notice a rear grip increase as well as you are lowering the engine 18% and shaving nearly 30% off the rotating mass of the clutch assembly.