New Project
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Road Warrior
Joined: Jan 2008
Posts: 1,405
Likes: 6
From: Portland, Oregon
New Project
Started chatting with a neighbor buddy of mine about wanting to get little wake up bounce to my road king. So here is what he came up with.
Changing my transmission pulleys:
2011 tri-glide 30T pulley to the front &
2007 Sportster 68T pulley to the rear.
Keeping the OEM belt for the RKC 2007.
Then upping my CAMs: either-- Knight Prowler TW555 or TMan Torqster 555s. not sure yet. I'm leaning towards Knight Prowlers but he runs TMan Cams and has bee extremely happy with them.
Spoke with the lead service manager while picking up my new trans pulleys and he said this will be a big improvement.
anyone else do these types of mods. actually I've searched the forum and found great threads that helped as well.
Changing my transmission pulleys:
2011 tri-glide 30T pulley to the front &
2007 Sportster 68T pulley to the rear.
Keeping the OEM belt for the RKC 2007.
Then upping my CAMs: either-- Knight Prowler TW555 or TMan Torqster 555s. not sure yet. I'm leaning towards Knight Prowlers but he runs TMan Cams and has bee extremely happy with them.
Spoke with the lead service manager while picking up my new trans pulleys and he said this will be a big improvement.
anyone else do these types of mods. actually I've searched the forum and found great threads that helped as well.
Seasoned HDF Member
Joined: Mar 2008
Posts: 9,377
Likes: 1,774
From: Central Texas
Yes i did, last month, I put the 98 tooth sportster pulley on my 07 Road King
classic and I woke that gal plumb up. Some day I might think about a 30 T
front pulley but not now, so if you already have the 30 T put it on first then
decide if you want to go with a sportster rear pulley or not .
classic and I woke that gal plumb up. Some day I might think about a 30 T
front pulley but not now, so if you already have the 30 T put it on first then
decide if you want to go with a sportster rear pulley or not .
Thread Starter
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Road Warrior
Joined: Jan 2008
Posts: 1,405
Likes: 6
From: Portland, Oregon
Yes i did, last month, I put the 98 tooth sportster pulley on my 07 Road King
classic and I woke that gal plumb up. Some day I might think about a 30 T
front pulley but not now, so if you already have the 30 T put it on first then
decide if you want to go with a sportster rear pulley or not .
classic and I woke that gal plumb up. Some day I might think about a 30 T
front pulley but not now, so if you already have the 30 T put it on first then
decide if you want to go with a sportster rear pulley or not .
I think you meant 68T Sportster Pulley?
Tourer
Joined: Oct 2014
Posts: 404
Likes: 21
From: PA
I swapped pulleys out on my 07 Street Glide to 30/68, made a huge difference. Running SE 204 cams, by far the best upgrade I've done. Either Ronnie's or Surdyke will give you the best price on sprockets. You will need 2" Grade8 bolts for rear sprocket, flange is thinner than stock sprocket. If you don't have the special socket for the trans pulley nut George's Garage is the best place to buy.
Road Captain
Joined: Sep 2007
Posts: 742
Likes: 4
From: Twin Cities, MN
I swapped pulleys out on my 07 Street Glide to 30/68, made a huge difference. Running SE 204 cams, by far the best upgrade I've done. Either Ronnie's or Surdyke will give you the best price on sprockets. You will need 2" Grade8 bolts for rear sprocket, flange is thinner than stock sprocket. If you don't have the special socket for the trans pulley nut George's Garage is the best place to buy.
They have as good or better pricing than Surdyke, but typically less S/H.
Also, if you're running the Tman555 Trq cam, the additional mods to the pulley won't be necessary.
That 555Tq cam is a great cam,and with a little head work can really run up top too!
Thread Starter
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Road Warrior
Joined: Jan 2008
Posts: 1,405
Likes: 6
From: Portland, Oregon
Surdyke's has great prices, but also check-out Kutter's in Janesville, WI.
They have as good or better pricing than Surdyke, but typically less S/H.
Also, if you're running the Tman555 Trq cam, the additional mods to the pulley won't be necessary.
That 555Tq cam is a great cam,and with a little head work can really run up top too!
They have as good or better pricing than Surdyke, but typically less S/H.
Also, if you're running the Tman555 Trq cam, the additional mods to the pulley won't be necessary.
That 555Tq cam is a great cam,and with a little head work can really run up top too!
Road Captain
Joined: Nov 2014
Posts: 680
Likes: 224
From: Buhl, Idaho
I understand that a rear pulley change to the sportster 68 tooth will give better acceleration (GOOD!) than the stocker, but how else will the change manifest itself? How much of a RPM change will that be at cruising speeds, on an average?Also, will that pulley fit an '08 FLHT? Thanks in advance.
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Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,897
From: Bedford UK
I understand that a rear pulley change to the sportster 68 tooth will give better acceleration (GOOD!) than the stocker, but how else will the change manifest itself? How much of a RPM change will that be at cruising speeds, on an average?Also, will that pulley fit an '08 FLHT? Thanks in advance.
So you get an increase of torque delivered to the rear wheel of 9.9% and your engine speed at any road speed will also increase by that amount. In other words if you normally cruise an say 2,500rpm, then to keep the same road speed you will have to use 2,500 x 1.0990 = 2,747rpm.
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Road Captain
Joined: Nov 2014
Posts: 680
Likes: 224
From: Buhl, Idaho
Thanks for the reply. Reading it made me realize that I forgot to ask if it will affect my speedometer reading? Being electronic (I think) maybe not. Any thoughts on that? BTW, I would only be changing the rear pulley.Thanks again.
Seasoned HDF Member
Joined: Jan 2013
Posts: 10,637
Likes: 1,246
From: Lake, Ms
2010 Limited with some stuff!!