Snowmobile Hot Grips® Model Yam 8ED -OEM factory supplier.
They are to be wired in series so that each grip gets 9 volts each. At 9 volts this results in 27 watts per grip. READ THE DETAILED IMAGE which explains the 88T versus 8ED, versus 8DN Yamaha designation before ordering.
Motorcycle Hot Grips® Heated Grips . 475-875
That is why our clutch side has a 7/8″ i.d. and the throttle side has a 1″ i.d.