Is it avaiable onthe market as a kit for bike engined cars?

Not generally... some have tried and had limited success, some no success at all. Try designing your own, where's your spirit man?!

I thought somebody on this forum (can't recall who though) had built such a system for himself and a few others which seemed to work ok.
A search might help

Ox put one on his R1 Indy which he's sold now and is building a busa Indy so he's worth sending a U2U to him.

HTH,
Rich.

Steve Keenan (Martin's brother) built one for his Indy, about £30 quid he said from a commercial solenoid, perhaps you could ask Martin?

Cheers

Chris

The DIY has pased through my mind. I was thinkg of something like the radio control cars use.

Made my own with two push bike cables. Total cost about £10 and works a treat
Rescued attachment Chassis 017.jpg

@Lightning
I think this is much better and reliable way than electic/hidraulic actuators.
Nice yob and thnx 4 the info.

I found this interesting DIY project Solenoid Operated Gearshift.
http://home.c2i.net/toratlel/Dash7.htm