I installed a set of RS34-D21K Mikuni flat slides on my recently completed '82 1100E , with a Domino push/pull throttle and new custom Venhill cables.. K&N offset oval individual filters, Vance & Hines 4-1 exhaust. Valve lash set, carbs balanced with gauges. It runs GREAT.
But the throttle return spring is extremely heavy. As in numb hand after a half our. I tried one of those clip on the grip plastic palm things, and it slowly works it's way around the grip.
I found a lighter spring for the big Mikuni HS/HSR 40+ mm Harley carbs from Mikuni OZ which is dimensionally identical to the stock spring, but wound from 1.55mm vs 1.77mm wire. It's a little lighter, but still much heavier than I'd prefer on an all day motorbike.
I tried moving the hook on the spring to the other post, which results in a dead spot before the spring is engaged.
Potential solutions include:
Anneal the hook on the spring and form it so it has about 20 degrees of pre-load when engaged on the alternate post.
Measure and buy a spring from McMaster-Carr's springs made to your specifications service.
Has anyone else solved this?
