SV 650 4 degree advance

[hardhat_harry]

Bought a couple of SV650 4 degree advance woodruff keys a year or so ago and never fitted them.

Supposed to improve throttle response and add a couple of bhp, I believe JHS knock these out at £25 a pop

Haven't got an SV now so up for sale.

They fit Curvys and Pointys

£12 each inc postage

[hardhat_harry]

Both keys now sold

[Mark-SV-UK]

what are these keys? never herd of them............ still new to biking

[johnnyrod]

It means the alternator rotor (also ignition signal generator) sits 4 degrees further advanced, it's a stepped Woodruff key, I'm told this is a common tweak in karts. Anyway it gives you a dollop of bottom end, see the red and blue torque traces for a stock (and rather weedy) 1999 SV650:
http://www.johnnyrod.co.uk/dyno.gif

[Mark-SV-UK]

Thanks for the info I wouldnt need that on my 2009 twin spark would I or would it still male a difference?

[johnnyrod]

Dunno to be honest. JHS sell them too ,you could ring them and ask.

[Mark-SV-UK]

Jhs??? Cheers

[JulesW]

JHS Racing (http://www.jhsracing.co.uk/), they specialise in SV650 minitwins and supertwins amongst other things.

[Mark-SV-UK]

Thanks all for your help :-)