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Discussion Starter · #1 ·
Hello Everyone,
Does anyone have any information on converting to a chain ?
Thanks
 

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I have looked into this and come up empty. I believe there is a conversion kit for the Sportster but as far as I know nothing for the Bolt or SCR950. If you happen to find something ...
 

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Discussion Starter · #3 ·
conversion

want to change the gearing and would prefer to keep the belt all depending on availability of different pulleys, shorter belt. will let you know.
 

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want to change the gearing and would prefer to keep the belt all depending on availability of different pulleys, shorter belt. will let you know.
Yep, the maintenance free aspect of the belt is great. What are you hoping to achieve? When you say "shorter belt" it sounds like you are looking for a smaller rear pulley?
 

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The main reason to go with a chain over a belt is suspension travel. Suspension travel is the bane of the belt drive. To get longer shocks with more travel, you need an idler pulley for the belt. This is because the belt will be tightest when the swingarm is parallel to the ground. As you move more away from that perfect parallel position, the belt gets looser and looser and looser, until it's so loose that it will jump teeth or shear teeth. A chain is much more forgiving! It is not supposed to be adjusted as tight as a belt... and if you do adjust it too tight, the chain will stretch pretty quickly. A too-tight belt will just roast your output shaft bearing. Or break, if you're lucky.

Chains are nice because you can easily modify the gearing too. You can technically do that with a belt, but only if someone actually makes pulleys in the size you want.

Charles.
 

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Discussion Starter · #8 ·
19

Yep, the maintenance free aspect of the belt is great. What are you hoping to achieve? When you say "shorter belt" it sounds like you are looking for a smaller rear pulley?
yes, want to put a 19" in the rear. Flat Track ma brother !!!
 

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yes, want to put a 19" in the rear. Flat Track ma brother !!!
Notching the swing arm brace for tire clearance was a detail mentioned in a recent SCR950 flat track conversion featured in an online build I read. I don't trust my welding that much. ;-)
 

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Why would you need to go chain conversion just to run a 19" rim? Buchanan will get you spokes for your hub, and then just lace on any 19 incher you want. You may have to grind clearance into the swingarm depending on how wide a tire you want to run.

Charles.
 

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Discussion Starter · #11 ·
size

Why would you need to go chain conversion just to run a 19" rim? Buchanan will get you spokes for your hub, and then just lace on any 19 incher you want. You may have to grind clearance into the swingarm depending on how wide a tire you want to run.

Charles.
the 19' is bigger(diameter), changing the ratio. Have not spent the time resourcing a smaller rear pulley but i will. I was thinking that if anyone had done a chain conversion it might be easier and less expensive with more available ratios. Just got the bike monday. got a lot to do. Thanks you guys are great !!!!
 

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Wait wait wait. A bigger tire will give you taller gearing. Meaning fewer rpms for the same speed. (potentially a higher top speed if you have the horsepower for it). A smaller rear pulley (fewer teeth) ALSO gives you taller gearing. If you're increasing the overall tire diameter, you'd want to fit a LARGER pulley in order to keep the same RPM for any given speed. Larger pulley = lower gearing = more acceleration and a lower top speed. This would counter a larger wheel/tire combo, which is higher gearing = less acceleration = higher top speed.

A smaller FRONT pulley will have the same effect as a larger REAR pulley, which is lower gearing, more acceleration, higher rpm for any given speed, and a lower overall top speed.

Charles.
 

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Discussion Starter · #13 ·
wait

thanks charles,
when i figured out the diameters of the 19 w/tire and 17 w/tire to put all in a gear calculator (pulley sizes, etc). to find out what i would need.
 
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