30 tooth pulley/ sprocket
Road Captain
Joined: Sep 2009
Posts: 551
Likes: 10
From: Toronto, Ontario
Some told me that a 31T can use the stock belt, but my mechanic had it all apart and said there was no more adjustment left, and that I'd need the shorter belt.
Sucks because part of my decision of going with the 31T over the 30T was the fact that I could use the stock belt. Might reconsider and go for the 30T after all.
Sucks because part of my decision of going with the 31T over the 30T was the fact that I could use the stock belt. Might reconsider and go for the 30T after all.
Road Warrior
Joined: Sep 2009
Posts: 1,267
Likes: 6
From: Northern Michigan
Are you really sure you need to go to the smaller primary pulley? The larger rear pulley should have taken care of the problem we had on '07-'08 baggers with being underpowered in 6th at normal highway speed of 60-70mph. But then again 2 on the rear is not the same as 2 off the front.
Last edited by icebite1; Jan 23, 2012 at 04:58 PM.
Road Warrior
Joined: Sep 2009
Posts: 1,267
Likes: 6
From: Northern Michigan
The shorter belt necessary when the smaller primary pulley is installed because you have to adjust the rear axel/pulley back to take up the slack created by the smaller diameter front pulley which then puts you at the max you can adjust. If the pulley is 1 or 2 teeth less it is also smaller in diameter. I hope i didnt talk in circles there'
Last edited by icebite1; Jan 23, 2012 at 05:25 PM.
Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
Likes: 132
From: SoCal
Some told me that a 31T can use the stock belt, but my mechanic had it all apart and said there was no more adjustment left, and that I'd need the shorter belt.
Sucks because part of my decision of going with the 31T over the 30T was the fact that I could use the stock belt. Might reconsider and go for the 30T after all.
Sucks because part of my decision of going with the 31T over the 30T was the fact that I could use the stock belt. Might reconsider and go for the 30T after all.
Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
Likes: 132
From: SoCal
The shorter belt necessary when the smaller primary pulley is installed because you have to adjust the rear axel/pulley back to take up the slack created by the smaller diameter front pulley which then puts you at the max you can adjust. The pulley is 2 teeth less and also smaller in diameter.
Road Warrior
Joined: Sep 2009
Posts: 1,267
Likes: 6
From: Northern Michigan
When I did mine Andrews gave me the size belt needed, i would beleive them.
Last edited by icebite1; Jan 23, 2012 at 05:45 PM.
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Joe Kucinski
Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
Likes: 132
From: SoCal
As far as ratio's are concerned, you are correct. As far as belt length I don't know the answer to that. I know my 2 tooth bigger rear pulley barely fit using the stock belt on my 08. That's why I thought MAYBE HD spec'd out a 1 tooth longer belt for the 09 and up and the 08 belt might be a way to go for a 09 and up guy using a smaller trans pulley.