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Hubs, Gearboxes, Sprockets and Chains Can't find 'em, grind em - hubs and transmissions, problems and modifications to make you run smooth and trouble free

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  #1  
Old 07-27-2011, 07:11 PM
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Greg58 Greg58 is offline
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Default Chain size chart

I thought this chart may help some new to M/b building to select a better chain.
Chain Strength & Dimensions

Chain Number Pitch Roller Diameter Betwwen Inner Plates Pin Diameter Average Tensile Lbs. per foot
__#40 (#425) 1/2 .312 5/16 .156 3,700 .41
__#41 1/2 .306 1/4 .141 2,000 .27
__#410 (#43) 1/2 .306 1/8 .141 1,600 .19
__#415 (#42) 1/2 .306 3/16 .141 1,600 .26
__#415H (#42H) 1/2 .306 3/16 .141 1,600 .26
__#420 1/2 .306 1/4 .156 3,700 .38
__#425 (#40) 1/2 .312 5/16 .156 3,700 .41
__#428 1/2 .335 5/16 .177 4,200 .44
__#428H 1/2 .335 5/16 .177 4,200 .44
__#520 5/8 .400 1/4 .200 6,100 .64
__#520H 5/8 .400 1/4 .200 6,100 .68
__#520-2 5/8 .400 1/4 .200 12,200 1.26
__#525 5/8 .400 5/16 .200 6,100 .65
__#530 (50) 5/8 .400 3/8 .200 6,100 .66


note the 410, 415, 415h all have the same tensile lbs. #41 is stronger.
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Last edited by Greg58; 07-27-2011 at 07:15 PM.
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  #2  
Old 07-27-2011, 07:44 PM
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Default Re: Chain size chart

It's strange that the #41 is stronger because when you compare #41 & #415 side by side, the #415 side plates usually look larger.
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  #3  
Old 07-27-2011, 08:30 PM
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Default Re: Chain size chart

I thought the 415 would be as strong as the 41, all the charts show 41 with higher tensile strenth.
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Old 08-16-2011, 10:33 AM
Macestar Macestar is offline
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Default Re: Chain size chart

If my cheap kit came with the 410 can I sub the #41 for it still with the 44t sprocket? The #41 is twice as wide. Sorry but I am a novice when it comes to chains.

Thanks,
Jesse
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  #5  
Old 08-16-2011, 05:09 PM
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Default Re: Chain size chart

Yes, on most kits the 41 or 415 will work. Some members have said that the chain will rub the transmission case, I have not had that problem.
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Old 08-27-2011, 02:00 PM
homersimp homersimp is offline
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Default Re: Chain size chart

I inherited a bike that needs the chain that goes to the motor. I am a complete novice. I believe it is a two stroke as it does require the mix of gas and oil. It looks like some of the bike pictures on the home page re the recent bike run. i.e., it is black with red rims. The distance between the sprockets on the motor and the back wheel sprocket is about 22 inches.

Any help on what chain I need and where to buy one would be greatly appreciated.

Thank you
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  #7  
Old 08-27-2011, 02:05 PM
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Default Re: Chain size chart

Homer, if you are unable to contact one of the very active motorized bicycle community members there in SD, go to one of our vendor websites that has a pic of the same motor you have and buy a chain from them... that's the ez way!
best
rc
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  #8  
Old 08-27-2011, 03:40 PM
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Greg58 Greg58 is offline
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Default Re: Chain size chart

If you know the engine runs you can go with the better 41 chain, it is sold at just about any hardware store. If there is any question on the condition of the engine the cheapest way is walmart , kmart or target. Bicycle single speed chain will work on most, it will take two bike chains to make one motorized bicycle chain. Walmart sells a chain breaker that works fairly well. Just lower the chain adjuster wheel all the way down and measure the chain, remember measure twice cut once.
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Old 08-27-2011, 05:02 PM
djp djp is offline
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Default Re: Chain size chart

new to the site.. i need to post a carb question, but how do i post it... djp
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  #10  
Old 08-27-2011, 06:18 PM
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Greg58 Greg58 is offline
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Default Re: Chain size chart

Go to the top of the pqge and do a search, just type in what you need to know. You can find just about anything on mb's here. If you dont find what you are looking for start a new thread giving as much info that you can on your carb, which engine, new kit or broken in etc. good luck
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