Shimmed clutch ??

Morgan44

I shimmed my drive clutch today with hopes of an improvement. There isn't a noticeable difference. From what I've read I though it was a sure thing. It slows down on hills just like before. It's running good just want a little more on the hills. What am I missing?

BGW

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ttcfan4476

what clutch do you shim? drive or driven?

Morgan44

Drive.

DOOmsman

In CVT transmissions the driven clutch senses the load
and backshifts to keep the engine running at a set speed.
try more pre wrap on the secondary or a stiffer spring in the secondary.

ttcfan4476

you need to shim or replace the spring in the driven for what you want.

pachanga90

Is the governor unhooked? Everything else is pointless if its' still connected.Shimming my Marathon Drive/Primary clutch was the only clutch mod I did(secondary/driven was stock),and the difference was Nite/Day with 22" tires and stock belt.

Morgan44

It is unhooked. That was gonna be my next question. When people talk about being careful of over revving with the governor unhooked. From what I've seen I don't think it's possible on mine. I also checked to make sure the throttle is opening all the way, and it is.

pachanga90

I honestly think that the only way you could over-rev a 2pg,with 22" tires is on a steep downhill run wide open.Maybe with stock-tires you could over-rev,but I never ran mine with them,so I don't know,but I'll put money on it over-revving.I ran mine flat-footed all the time for 4 summers,and it still was running when I swapped to big-block power.They are just underpowered enough,that they are usually under load,more than screaming,unless you fly downhill,then just back off the gas a bit.Hope this helps.

Morgan44

Pachanga your posts about shimming the primary is what inspired me to do so. Great info by the way. The spring shop knew exactly what I was talking about with the u bolt washers. I'm just trying to get the old girl to hold strong on the hills. I'm not real concerned with top speed. I don't expect this little motor to scream down the road, and I'm ok with that. I'm not real sure about tearing into the secondary, I may not be equipped with the right tools.

pachanga90

The hills are the biggest challenge for that motor.we have a long flat incline that gives.stock carts a challenge.they just don't make enough torque for long.hills or inclines.on short hills.even steep ones they are OK.