Yamaha g2 torque question

deerslayer1985

I have been saving up to get the full torque kit. I haven't been able to haul more than 1 other person up some of the hills I go up. My buddy was with me today, and said you know you can put a washer behind the stock spring and gain some torque, until you get the real orque kit don't you.... Has anyone done this, and is he right? If so will it hurt anything? Its gonna be a few months before I have the money to get the full torque kit, but if I could stick a washer behind the spring and gain some torque until I get the money that'd be great. Let me know if it is possible?

BGW

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cgtech

Go to a local Yami dealer and get a Umax spring for the rear clutch (less than $10). I dont know where you would find a washer of the right dimentions to fit in the spring seat anyhow. Also the tang on the spring would have to be cut off, causing other clutch "weirdness". the Umax spring makes a noticable difference for very little money. That spring, white washer in between the sheaves removed, and a HD belt are the only mods i have done, i am happy, and i don't plan on sinking any more $ into the clutches in the near future.

Field6565

I have done something like this to my G1 after I installed bigger tires on it and had good results. Basically it makes the spring harder to compress and it holds the cart in low gear longer while the engine is at higher RPM making more low end torque. I ended up putting a 3/8 shim in mine but I don't know how the G2 four stroke motor will act with it because the G1 motor is a two stroke. If I were you I would do what cgtech suggested to take the guess work out of it. Good luck with it.

smallblock450sl

I agree with cgtech, the Umax spring works great at little cost. Don't see how a washer or shim would work with the spring ends needing to be inserted in the spring seat and sliding sheave. I will add, try running the car with the airbox disconnected, if there not sealed just right, you lose power. Good luck

deerslayer1985

Thanks for the help guys. Another question though. Do you guys have a part number for the umax spring? The local yamaha dealer act like they have no idea what I am talking about.....Sounded like a teenager...

JcXtreme72

I installed the Torque spring from CPP and with the stock engine in the yard when pulling something super heavy or stuck in mud the 24" tires will spin (Slowly with the stock engine) instead of just doing nothing like it did before the spring. I noticed a very noticable difference when I put it in. I do recommend going that route but few tips if you do. Use a ratchet strap wrapped around the axle to help put the rear clutch back on. It won't happen with out one. And I know myself and at least one other person had problems with them braking the cotter pin and the nut coming off the driven clutch. I tried several solutions from double nuts and different pins till I finally got pissed one day (A month later) and tacked the nut on.

Mike Mac

Keep reading the Yamaha site. You need to make sure you do all clutch maint, like new ramp shoes and the spacer behind the spring seat when you do this procedure. Don't want to have to do this again.

Also take cover off the primary clutch and check weights and other related parts for wear issues there.

Dave in VA

Maybe this is the "washer" being referred to?

deerslayer1985

I just replaced all the weights in the primary clutch a couple months ago. It seems to have a lot more top end now. I grease the clutches every 3 or 4 weeks. Sometimes sooner. I think I need a new belt for sure. Its getting pretty wore down. I imagine that would probably help with a little bit of torque. The secondary clutch is all stock. It does need new ramp shoes. Planning on fixing those soon. So will the umax spring make a noticeable difference? Or should I just wait and get the cpp, or plowmans powerkit? Hopefully when the vegascarts guy gets the kits done for the big block engines in the g2 I can get one of those. For now though, I just need some more torque....

Mike Mac

Slayer, the umax spring is all you will need!! Just be a maniac for maint and your car will run fine!! Be sure you install the spacer!!