RGM belts updated

Just a question, are you guys switching out your sprockets for something with less teeth? CR says it raises the gearbox by 2 teeth. Im only asking this because I picked up a xring chain and sprocket.

Vulin said:

Just a question, are you guys switching out your sprockets for something with less teeth? CR says it raises the gearbox by 2 teeth. Im only asking this because I picked up a xring chain and sprocket.

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It is a concideration. I do 70mph at 3750rpm. Third gear 55 is very good. I am running a 21t sprocket. I may go to 19 to help unload the gearbox and clutch.
If you have a 19 sprocket now, stay with it. 21 is max. I too have a oring chain so whatever I do will be more perminate. I do not like slpitting, cutting or adding link to any chain much less an oring chain.
Another note. The spacer for the driver hub has a relief cut on both sides. Make sure you use the proper side (wider relief)against the hub. The wrong one will leave the hub loose.

Vulin said:

Just a question, are you guys switching out your sprockets for something with less teeth? CR says it raises the gearbox by 2 teeth. Im only asking this because I picked up a xring chain and sprocket.

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When my belt was fitted the gearbox sprocket was changed to keep the final drive ratio (very near to) unchanged.

ntst8 said:

Vulin said:

Just a question, are you guys switching out your sprockets for something with less teeth? CR says it raises the gearbox by 2 teeth. Im only asking this because I picked up a xring chain and sprocket.

Click to expand...

When my belt was fitted the gearbox sprocket was changed to keep the final drive ratio (very near to) unchanged.

Click to expand...

Vulin, it is quite a jump in ratio. If you don't mind breaking it back down after installation, which is not quite the job as it used to be with the chain, you may want to see how it feels. If not, throw on a 19t while apart. All will be well.

Do you have pics of how much you had to grind away on the buttonheads/ and or chaincase to make it fit?

I have a 19T so I'll try that.

swooshdave said:

Do you have pics of how much you had to grind away on the buttonheads/ and or chaincase to make it fit?

I have a 19T so I'll try that.

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No pics. It wasn't enough to remove the allen socket hole. RGM says to shim it out at the clutch locating washer. My findings were that it seemed that the belt rode a little to the inside, running true and not walking in that direction. I felt I needed to capture it fully. That's not to say that shimming isn't the answer, it is just what I happened to do. I prefer having that spinning mass in tight, It may not make any differance though.
Just my preferance.

pvisseriii said:

swooshdave said:

Do you have pics of how much you had to grind away on the buttonheads/ and or chaincase to make it fit?

I have a 19T so I'll try that.

Click to expand...

No pics. It wasn't enough to remove the allen socket hole. RGM says to shim it out at the clutch locating washer. My findings were that it seemed that the belt rode a little to the inside, running true and not walking in that direction. I felt I needed to capture it fully. That's not to say that shimming isn't the answer, it is just what I happened to do. I prefer having that spinning mass in tight, It may not make any differance though.
Just my preferance.

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I'm missing the clutch washer and shims. No wonder it hit so badly.

On mine, I had to bevel the outer edge of the hub that the bearing is mounted in as it was rubbing on the inside of the clutch center. In the picture you can see that it has square shoulders. However in retrospect I also had some end float in the clutch center that I had to shim for and if I had put the shim on the inside between bearing and clutch center it may have been enough to compensate for rubbing.


That's good news cause this just showed up. :mrgreen:[/quote]

pvisseriii said:

Another note. The spacer for the driver hub has a relief cut on both sides. Make sure you use the proper side (wider relief)against the hub. The wrong one will leave the hub loose.

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I measured the different sizes and could barely tell there was a difference. I can't see how it would matter, do you know why it does?