Drive pulley change question??
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Intermediate
Joined: Feb 2012
Posts: 41
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From: Rochester,NY
Drive pulley change question??
Back in the day when we changed the front sprocket of the crotchrockets they would come out of the hole quicker. Will this also work on my 2012 SG ? If I were to go down in tooth count will it react the same way as the old bikes did?? Looking for some more out of the hole quickness with out cams just yet. Not concerned with top speed being slower as this is not a crotchrocket. Any help or advise would be greatly appreciated!
Stellar HDF Member
Joined: Dec 2009
Posts: 2,561
Likes: 280
From: North Cental Iowa
This would do the opposite, plus you can't change the rear pulley on 09 & later with the IDS.
Elite HDF Member
Joined: Jun 2007
Posts: 3,873
Likes: 13
From: NW Arkansas
I changed the rear to a 68T pulley (bigger by two teeth) and have a 31 tooth to go on the front that I haven't installed yet. I used the same belt. The rear wheel is slid up about 1/2 inch or so. When I install the 31T, the rear wheel will go back to the factory position. Hope to complete this this winter.
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Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
Back in the day when we changed the front sprocket of the crotchrockets they would come out of the hole quicker. Will this also work on my 2012 SG ? If I were to go down in tooth count will it react the same way as the old bikes did?? Looking for some more out of the hole quickness with out cams just yet. Not concerned with top speed being slower as this is not a crotchrocket. Any help or advise would be greatly appreciated!
Your stock trans pulley is 32T, but alternatives available are 31T and 30T. Frankly changing one tooth is not worth the effort and expense, so a 30T would be my choice. Moving to the rear wheel, the 68T pulley that Mike mentions combined with the 30T will give a decent improvement in overall gearing.
Going from stock 32/66 to 30/68 gives a reduction in gearing of almost 10% and an increase in rear wheel torque of the same amount. Makes for a cheap performance upgrade! From previous threads I understand your current belt will fit, but that is worth checking.
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Grand HDF Member
Joined: Jan 2012
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From: Oklahoma
This might also be the place to discus getting the speedometer back somewhere close to being accurate and what happens to the 6th gear light if that might be a concern. All I know is that changing this stuff will throw the speedo off, don't know what to do about it.
