increase torque/speed on 2cyl/4cycle

[AirJunky]

Just a little clarification on this GXT..... all of these mods worked on the stock Marathon 4 stroke engine?

I found the 27077-G02 EZ-Go 2 stroke belt on Ebay here for $29 shipped. It lists the length as 40 3/4" & shows the 91 - 94 4 stroke.

Anyone think this belt or the Yamaha would be better?

Anyone have the part # for the Yamaha belt?

Thanks.

EDIT: I swapped email with my local EZGo dealer. He said the 27077-G02 (40 3/4") is the stock belt for the Marathon 4 stroke. When I suggested going a bit shorter for improved torque, he said, "you're only going to want to use a stock belt, it's a long story but trust me the cart clutches take a huge amount of engineering for belt size and you're better off running a stock belt."

Just a guess here.... but I imagine he's saying this because of any additional stress on the bearings in the crank or clutch?

Originally Posted by GXTsandman

http://www.cartpartsplus.com/ez-go-power-kit.html $45

http://www.rainbowcustomcars.com/pro...ke_System.html $45

http://www.cartpartsplus.com/ez-go-carb-jet-kit.html $18

That puts you $8 over budget.

If you don't go with a shorter belt, at least a new belt might do you some good depending on how worn out the old one is.

I did all these at once (along with custom exhaust and a shorter belt) so I couldn't tell you which was better. I would recommend some pre-filters if you plan on going in dry dirt or sand with that filter.

[AirJunky]

I'm checking out CPPs Clutch Tuning Spring & Power kit. I see a testimonial on their site & the guy swears by this mod for additional torque.

[drc007]

Originally Posted by AirJunky

I'm checking out CPPs Clutch Tuning Spring & Power kit. I see a testimonial on their site & the guy swears by this mod for additional torque.

did you ever figure out if they would work? and can you use both of them at the same time?

[AirJunky]

Originally Posted by drc007

did you ever figure out if they would work? and can you use both of them at the same time?

In a conversation with Tom at CPP, I found out that they will work together. And having the clutch machined will increase that performance even more. My own clutch appears to be in pretty good condition so I'm not going to have it machined. But I plan on ordering the two kits ASAP. I'll definitely post the results when I get them installed.

[RICHIE RICH]

Originally Posted by AirJunky

In a conversation with Tom at CPP, I found out that they will work together. And having the clutch machined will increase that performance even more. My own clutch appears to be in pretty good condition so I'm not going to have it machined. But I plan on ordering the two kits ASAP. I'll definitely post the results when I get them installed.

Tom is correct, they do, the spring is most of the torque gain, but if you machine both plate you will gain a little more, the bonus of machining is that you plate will not slip and close the gap at low speed increasing the torque as well, FYI, if you bring them somewhere to have them machined, just make sure you clean them good, any metal chips left in the sliding plate can cause damage to the shaft and will make it stick and bind up... on the yamaha's i also replace the bushing before machining to make sure it is true and replace with a new seal before before installing.. hope that the info helps

[drc007]

ThAnks Richie rich and air junkie, I will give Tom a call. I'm not sure how to tell if the clutch is in good shape or not. Do yall know anything about converting a 36 degree clutch to a 28 degree clutch?

[RICHIE RICH]

Originally Posted by drc007

ThAnks Richie rich and air junkie, I will give Tom a call. I'm not sure how to tell if the clutch is in good shape or not. Do yall know anything about converting a 36 degree clutch to a 28 degree clutch?

FYI, unless you have your own Lath, it is normally cheaper to just buy the entire kit, for the extra $50.00 you get a new plate...not to many machine shops will do it for less.

[drc007]

Originally Posted by RICHIE RICH

FYI, unless you have your own Lath, it is normally cheaper to just buy the entire kit, for the extra $50.00 you get a new plate...not to many machine shops will do it for less.

I'm not sure I understand. Way is a lath. Someone on a post mentioned replacing the clutch cam and buttons?

[RICHIE RICH]

a lath is a a metal cutting machine that you use to cut the clutch plate.....your best bet is to just order the parts new that you need and install, then you don't have to worry about anything

[ruredy]

Originally Posted by drc007

Do yall know anything about converting a 36 degree clutch to a 28 degree clutch?

Sure, I posted about it in the shorter belt and 28deg clutch thread in the tech section. you just need to swap out the parts listed there.