Question about RPMs
Elite HDF Member
Joined: May 2008
Posts: 4,579
Likes: 10
From: S.E. MO
Think it was more like 2400
Thread Starter
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Road Warrior
Joined: Dec 2008
Posts: 1,530
Likes: 1
From: Upstate, SC
That is strange. My engine was turning over slower than I thought on my way home yesterday. Amazing how low-end torque can fool you.
Elite HDF Member
Joined: Sep 2008
Posts: 4,440
Likes: 148
From: Northwest
Vary your speed - don't keep it at one steady rpm/speed.... change gears, speed up, slow down... not all real quick mind you.... but every few miles.
Stellar HDF Member
Joined: Mar 2006
Posts: 2,622
Likes: 7
From: Gulf Coast
Maybe my 06 is geared differently from the later models. Checked tonite on a ride over to the eastern shore. At 3000 rpm I'm at 72 mph,70 mph is about 2900 rpm. I'm running a 180 tire, the profile may be a little lower,guess that could make a tad of difference.
Anyway,my bike is happy.
Good Luck
Tom
Anyway,my bike is happy.
Good Luck
Tom
6th Gear
Joined: Nov 2008
Posts: 11
Likes: 0
gearing...
It could be set up to get the "outlaws" out of more tickets. Radar is radar, and there's no way a county mountie will not be taking pictures when you go by. But the sound of a modern twin cam running 90+ sounds milder than a 30 year old harley running 40. With that in mind, the modern day engines should rack up some impressive mileage and lifespans. Every bike has that sweet spot, for some of the "outlaw" types, it's alot faster than I'll ever like to run.
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Road Warrior
Joined: Dec 2008
Posts: 1,530
Likes: 1
From: Upstate, SC
Seems like I remember reading somewhere that the 06s with the TC88 are geared quite a bit lower than the 07-09 bikes with the TC96. That would account for your higher rpms.
Club Member
Joined: May 2006
Posts: 14,564
Likes: 9,223
From: the 50s & the 60s
Tom, I've posted this a few times.
Yes our 06s have more desirable, in my opinion, gearing..........
.
.
.
......rear sprocket......
.............the 006 domestic is 70 tooth.
.......the 007 up domestic is 66 tooth
.....the 006 international is 68 tooth.
.....the 007 international is 64 tooth.
.
.
.
....gear........006.......007 and up....005 back
....1st.......9.876...... 9.312......10.11.......1st
....2nd.......6.81.......6.421.......6.958......2nd
....3rd.......5.064......4.774.......4.953......3rd
....4th.......4.164......3.926.......3.862......4th
....5th.......3.477......3.279.......3.15........5th
....6th.......2.96........2.79.......no
.
.
.
.........drive belt for 006 domestic is 133 teeth
.........drive belt for 007 domestic is 131 teeth
..drive belt for 006 international is 132 teeth
..drive belt for 007 international is 130 teeth
.
.
.
edited to add.....
difference in the 06 and the 07 up is
in the rear sprocket, not the transmission
.
Last edited by mud; Jun 10, 2010 at 05:18 AM.
Club Member
Joined: May 2006
Posts: 14,564
Likes: 9,223
From: the 50s & the 60s
bb, checked my 006 today.
5th gear.....60 mph.....2800 rpm
5th gear.....70 mph.....3200 rpm
6th gear.....70 mph.....2800 rpm
gearing
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Elite HDF Member
Joined: May 2008
Posts: 4,579
Likes: 10
From: S.E. MO
Well it looks like my tach works right then, with the different sprockets between the 06 and 08. I was a little worried about my tach, with the issue I had with it when I first put it on.
