Throttle return springs
I took a look at the throttle return spring on the ACE, and did some measurements. The spring looks like the picture below. Dimensions of mine are as follows:
7 coils, 0.118" wire, OD of spring coils is 1.180", and this makes the ID of the coils roughly 1.062". OD of shaft it fits on is 0.897" Width of coils is 0.857". Length of hooked leg which goes around pedal from top of coils to bottom of hook is 2.278". Length of leg with 90 degree bend from top of coil to bottom of bend is 2.837". I did not measure the torsion of the spring since I did not remove it from the pedal. I believe that the ACE spring is a left hand wind spring.
View attachment 1079
According to ebay, there are loads of heavy duty throttle return springs for sale to fit the RZRs. Some folks on the forums write that the original spring is too light when on rough terrain, which would be the reason that there are a proliferation of these springs on the market.
Does this mean that the original RZR throttle return spring is lighter than the one we have on the ACE? Don't know. Would the original RZR spring fit on the ACE? Don't know that either. Maybe someone with both can compare the RZR spring to the ACE spring. If there is one already made for another machine that would fit perfectly but have less tension, that would be ideal.
Meanwhile, I will do some looking for other suitable springs in the aftermarket.
