Skyhawk chain won't fit MM sprocket

rijopiatt · Jul 29, 2011

The chain supplied with my Skyhawk engine won't fit on the Manic Mechanic sprocket I just installed. As the chain goes around the MM sprocket it gets and farther off ie. won't seat in the gullet/valley/base

. By the time I'm half way around the sprocket the chain is resting on top of the teeth. Any suggestions appreciated.

Rick in Indiana

MotorBicycleRacing · Jul 29, 2011

rijopiatt said:
The chain supplied with my Skyhawk engine won't fit on the Manic Mechanic sprocket I just installed. As the chain goes around the MM sprocket it gets and farther off ie. won't seat in the gullet/valley/base . By the time I'm half way around the sprocket the chain is resting on top of the teeth. Any suggestions appreciated.

Rick in Indiana

The SkyHawk kit chain is 410 chain which is 1/8" between the chain side plates.

The MM sprocket is made to fit 415 chain which is 3/16" between the chain side plates.
They also work well with 41 chain which is 1/4" between the side plates.

Suggestion? Use a real ANSI 415 chain instead of the cheap Chinese 410
bicycle chain.

kevinkrg6 · Jul 29, 2011

Just got a MM sprock and had the same issue.

Even better than a 415 is a #41 chain. See if you can find it locally. It'll be cheaper and you'll get it faster.

It'll be stronger too.

You may need a small spacer behind the drive sprock for it to work though, come to think of it.

Sheriff John · Jul 29, 2011

does a number 41 chain fit the teeth of the stock sprocket.

MotorBicycleRacing · Jul 30, 2011

Sheriff John said:
does a number 41 chain fit the teeth of the stock sprocket.

Yes, it does.
The 410, 415, 41 chain all have the same pitch, roller diameter size
and pin diameter.
The only difference is the distance between the side plates.
410 = 1/8"
415 = 3/16"
41 = 1/4"

rijopiatt · Jul 30, 2011

Am I most likely to find the 415 at a bike or motorcycle shop or do you have a recommended vendor?

Greg58 · Jul 30, 2011

Tractor supply sells the #41 at $17 for a 10ft roll, makes two chains.

F_Rod81 · Jul 30, 2011

rijopiatt said:
Am I most likely to find the 415 at a bike or motorcycle shop or do you have a recommended vendor?

You can go to the motorcycle shop for it, but it will be a little more pricey for the 415. If you go to your local farm and garden store or napa and they should have some #41 on hand. . .

rijopiatt · Jul 30, 2011

And will this #41 require a "spacer" mentioned by reponder 3? If so, how's that done?

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Skyhawk chain won't fit MM sprocket

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