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Just another thought -- Since you just got the kart ask the previous owner what fuel did he race with gas or alcohol? The carb is set up for one or the other. RAT gave you a lot of food for thought and it is all very good. The 18:1 ratio is way off, use that and you will go broke changing...

I stand corrected he does have an internal key, Philip is in Sweden and has converted the engine over to run horizontal which is a feat in itself. What a project. I guess this is his contribution to going green for the planet, don't throw anything away just use your brain to figure out how to...

If he got a 1" clutch more than likely it would have a keyway not the built-in-internal key. Cost too much for a broach to do the internal key for such a limited market. Once you get to 1" crankshaft 99% of the time it would be a torque converter not a single clutch system. I would try and...

McMaster-Carr normally has just about everything you need but they don't have the step key from 3/16 to 1/4". You would have to make your own from some 1/4" key stock.

Call Max-Torque and get a 7/8 clutch to start with. Crankshaft has to be drilled and tapped and measure the length of the crankshaft so you can give that info.

I sure hope he welded to the key and not the shaft. Since everything on the kart is metric you should be looking for metric keys either 6mm (.236) or 5mm (.197). There is still a big void from the end of the shaft and the end of the sprocket. This should be filled in with a plug so the...

Come on now EZGO nothing is ruined on this site , just a bigger challenge. Brandy, where are you located-what state? I have to admit the design leaves a little to be desired but it is fixable. Too damn cold for a go kart right now, at least in Illinois. Send me the sprocket and if you have...

Oil the chain every time you are done riding and the oil will keep everything from rusting. The rust on the inside improves the coefficient of friction and it will work better. The shoes in a slip mode will clean everything up on the inside. Now rust on the chain is BAD because it will wear...

Hate to tell you, our outside snap ring on a Max-Torque does NOT have the ears on it to snag things. The Max-Torque uses the Rotor Clip "SHI". EVERYTHING in and on the clutch is American made. The other tell tale sign is the drum has 6 holes and the dust cover on the inside has 6 holes, the...

Dual gear 12 tooth #35 chain sprocket used on a jackshaft arrangement that has high and low engagement. Would be a Max-Torque SS12/1234. The one in your picture in a china single gear sprocket, can tell by the snap ring.

What size is the crankshaft? 5/8" or 9/16" ? RLS is partially correct, the longer you have pedal to the metal the better off you are so the clutch has a chance to cool down after lock up. Tire size, not over 13" and having the right gear ratio 12/72 with #35 chain and 10/60 with #420 chain...

Set screws would have a cup like point on them, you want to hit them on the belt sander to get them nice and flat. Use some blue loctite to hold them in place. I would swap out the set screws for some good socket head cap screws so you can torque them down good on the motor shaft since they...

If you haven't bought the sprockets and chain yet, move up to #40 chain but keep with the #41 sprockets. The heavier chain helps out when your sprockets are not perfectly aligned plus it is a much beefier chain. #41 and #420 chain is the same thing but the #420 has been prestretched. A #40...

The 98L belt was 30.250 outside circumference of the belt fitting a center to center distance of 7.375" to 7.500" All the series 20 belts measured 3/4" at the top of the "V" Belts are not cut with a knife but ground so they can be +/- .015 depending on who the manufacturer was. We used three...

Education is free. Yes, it is a copy of Comet's series 20 but improved on all the failure points of the series 20 by Comet. They had no reason to make improvements since they were the only unit in production back in 1996 when we collected all the returns from the various manufacturers of go...

Some of the things said about belt drive are true but if you look at Pfeifer Industries web site you can get a good education. Why yes, same address as Max-Torque. That is my son's company. Belt drives are used on enduro karts (lay down karts) going FAST but on very big tracks. Also all the...

The clutch in the picture is a Max-Torque "SS" (six shoe). The description on the old style clutch was a two shoe clutch with the material riveted to the shoe. I have one hanging on my wall and I have bead blasted some to bring them back to life for some people but they are very rare to find...

TNThomas -- back in the 60's several of the racing kart manufacturers used the rear sprocket for the brake using either hydraulic or mechanical brake. But like you indicated, over oiling the chain made this set up nearly useless once the sprocket got coated with oil. But it was better than a...

Thank you for the drawing ezcome-ezgo better than a picture. That is how the brake band works, so that is how you have to set it up if you want yours to work properly. One end of the band HAS to be fixed, if is not then it would rotate around with the wheel.

There is only one pin with the cable through it, the first opening is for a FIXED pivot point, the cable is pulled towards the fixed point which is what puts the pressure on the brake band. Normally on the kart there would be a bracket welded to the frame that had a 3/8" bolt welded to the...