...Can I still use the G2 tube with yamaha's heated grips?...I don't understand what a relay is or does?...Where do I pick up a relay that is suitable for this use??...I have plenty of time as Massachusetts is still under 3 ft of snow!
I can't positively say that Yamaha heated grips will work with a G2 throttle sleeve, but I don't see why not. This has been discussed before so the answer is here someplace.
At full power the heated grips can draw several amps of current so the best way to deliver this kind of power is directly from the battery. You would connect one of the relay's switched terminals directly to the battery and the other switched terminal to the heated grip power controller. You would then be able to pickup any low current, low power wire such as the front running light to power the coil of the relay when the ignition key is on. When the ignition switch is turned on the running light gets power, which energizes the coil of the relay causing the high current switch in the relay to close and stay closed as long as the key is on.
So, I gotta ask, why a G2 on a '09? The '06 & '07 had a non-concentric throttle pulley on the throttle bodies causing throttle tube movement to have a non-linear engine speed response. Right in the 3k rpm range a small amount of throttle movement would cause a larger increase in engine speed. The G2 throttle tube pulley has a mirror image curve to the throttle body pulley, thereby canceling out the non-linear response. Your '09 has a round throttle body pulley and a round throttle tube pulley so you will have a 1:1 throttle to engine speed response. By adding a G2 throttle tube pulley you have
slowed the response between the throttle tube and the engine speed in the 3k rpm area. This should result in the engine speed lagging the rotation rate of the throttle as it is rolled on.
Here in NH our snow has lots of feets too. If it starts melting today I don't see it as being gone until April. And, I do hope it takes that long, 'cause if it melts all at once we will have the 4th Flood Of The Century in the past 6 years.
Edit: Since G2 is not a searchable term (needs to be more than three characters) I'll offer a couple of related threads on G2 throttle tube and OEM heated grip.
Done it!
Info on
doing it.
Do you have the aluminum throttle tube or the plastic tube?
https://www.fjrforum.com/forum//index.php?showtopic=26732&view=findpost&p=312236