I think Glyn tried an £12 scooter one on his, wasn't quite 1/8th turn since our carbies are a little bigger than scooter ones but it was shorter than stock if I remember correctly, I'll ask him when he gets back off his hols

Cheap enough to give it a go with anyway

Just chop an inch out or your cables ;)

Phil I've a quick action throttle fitted to the 583. The only reason was because the std throttle was a bit knackered and sticking, and I didn't want any prob's with scrutineering. The one fitted to my bike is off an Honda RS 250. If it was fitted to anything bigger than the 583, it would probably have me on my ar$e. Your welcome to have a go on saturday if you think you can control the power (-8

Quick action throttle
 

Like anything else in racing it seems to be a personal preference thing.
I have used them regularly as I feel it helps cut down on the "see-sawing"of the suspension between of and on the gas. Mayjust be that I'm ham-fisted, clumsy etc. personal as I say.

I'd like one. I've often found there's a bit more twist left when I thought I was already on the stop.

One controversial thought though... is the throttle considered a "carburetion instrument"? If so then the rules don't allow a 583 to have one. If it's not, then neither Class A of B are allowed them cos the regs don't say you can!
Doubt anyone would give a toss, but it seems like an open door to an easy protest if you upset someone.

Nick I would say they come under hand controls, at least I hope so.

rule 1.4

and rule 1.6.9

so they are allowed Nick:)

surely with a 620 nobody would need to change theirs anyway, as difference is very minimal? just been out in garage to check:D

Ahhh... I missed 1.6.9!!!
Furry muff then, right you are... one new throttle in the post for #34!

:)

:o :o :o

You are kidding right?

Nope. Turned out my wrist was on it's stop, not the throttle!