#### 5-7HEAVEN

##### Well-Known Member

Sprockets, chains and gearing.....

My clutch has a #41 10t sprocket.

To simplify things, I'll use all #41 gears.

They use 1/2' x 1/4" wide chain.

I choose #420 chain.

It is very strong & 1/4" wide.

#40 chain is just as strong but 5/16" wide.

Clutch 10t sprocket to 10t gearbox input.

Gearbox has 3.75:1 ratio.

Then 10t output sprocket to 27t chainring sprocket.

The ratio is 10.125:1 at the bottom bracket.

with 10.5:1 in First gear

and 5.25:1 in Seventh(final) gear.

Perfect.

My clutch has a #41 10t sprocket.

To simplify things, I'll use all #41 gears.

They use 1/2' x 1/4" wide chain.

I choose #420 chain.

It is very strong & 1/4" wide.

#40 chain is just as strong but 5/16" wide.

Clutch 10t sprocket to 10t gearbox input.

Gearbox has 3.75:1 ratio.

Then 10t output sprocket to 27t chainring sprocket.

The ratio is 10.125:1 at the bottom bracket.

with 10.5:1 in First gear

and 5.25:1 in Seventh(final) gear.

Perfect.

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