Primary sprockets question
Thread Starter
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Tourer
Joined: Sep 2010
Posts: 461
Likes: 8
From: western CT
Baker got back to me they will sell a 27 or 28 tooth with longer chain and a auto adjust chain tensioner with a wider shoe for about 300. Hmmmm would 28 be too much the are inclluding the 28 with the dd6 which has no overdrive the 6th is equal to our 5 so the 28 tooth gives it the speed of a 6? Im sure my 125 hp would spin a 28t easily? End up with 5 nice and tall gears, my 1st is barely needed as is now.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
Baker got back to me they will sell a 27 or 28 tooth with longer chain and a auto adjust chain tensioner with a wider shoe for about 300. Hmmmm would 28 be too much the are inclluding the 28 with the dd6 which has no overdrive the 6th is equal to our 5 so the 28 tooth gives it the speed of a 6? Im sure my 125 hp would spin a 28t easily? End up with 5 nice and tall gears, my 1st is barely needed as is now.
When you change the sprocket it changes 6th from 1-1 (the same as our 5th) to 0.86-1.
Thread Starter
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Tourer
Joined: Sep 2010
Posts: 461
Likes: 8
From: western CT
cool ill guess ill do a 28 , dont like it i can always take it off
Seasoned HDF Member
Joined: Nov 2006
Posts: 12,878
Likes: 5,449
From: la la land jerzey
my day driver EVO 98 FLST has an 89 inch motor we have developed it for 20 years to a good powerfull reliable unit - my shop has built hundreds of them
my gearing - front sprocket 25 trans - belt 32 front - rear wheel 65, it has a 6 speed with an .086 top gear final ratio 2.54 at 80 MPH it purs will pull hills fine and gets good fuel mileage stock ratio is 2.94 early bike with 70 tooth rear sprocket 3.15 is the ratio
what is the rear sprocket on yours
my gearing - front sprocket 25 trans - belt 32 front - rear wheel 65, it has a 6 speed with an .086 top gear final ratio 2.54 at 80 MPH it purs will pull hills fine and gets good fuel mileage stock ratio is 2.94 early bike with 70 tooth rear sprocket 3.15 is the ratio
what is the rear sprocket on yours
Thread Starter
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Tourer
Joined: Sep 2010
Posts: 461
Likes: 8
From: western CT
my day driver EVO 98 FLST has an 89 inch motor we have developed it for 20 years to a good powerfull reliable unit - my shop has built hundreds of them
my gearing - front sprocket 25 trans - belt 32 front - rear wheel 65, it has a 6 speed with an .086 top gear final ratio 2.54 at 80 MPH it purs will pull hills fine and gets good fuel mileage stock ratio is 2.94 early bike with 70 tooth rear sprocket 3.15 is the ratio
what is the rear sprocket on yours
my gearing - front sprocket 25 trans - belt 32 front - rear wheel 65, it has a 6 speed with an .086 top gear final ratio 2.54 at 80 MPH it purs will pull hills fine and gets good fuel mileage stock ratio is 2.94 early bike with 70 tooth rear sprocket 3.15 is the ratio
what is the rear sprocket on yours
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,114
Likes: 7,638
From: Poolville
Ratio Calculator
Follow this link
http://tuneyourharley.com/biketech/c...te-gear-ratios
To figure out what you currently have and and what you might like. when I made all my changes including a new OD 6 spd I was able to get a 3.31 in fith but still had a 2.84 in sixth which gave me 2600 rpm @ 70 mph. very happy with end result. Good luck.
http://tuneyourharley.com/biketech/c...te-gear-ratios
To figure out what you currently have and and what you might like. when I made all my changes including a new OD 6 spd I was able to get a 3.31 in fith but still had a 2.84 in sixth which gave me 2600 rpm @ 70 mph. very happy with end result. Good luck.
Thread Starter
|
Tourer
Joined: Sep 2010
Posts: 461
Likes: 8
From: western CT
Follow this link
http://tuneyourharley.com/biketech/c...te-gear-ratios
To figure out what you currently have and and what you might like. when I made all my changes including a new OD 6 spd I was able to get a 3.31 in fith but still had a 2.84 in sixth which gave me 2600 rpm @ 70 mph. very happy with end result. Good luck.
http://tuneyourharley.com/biketech/c...te-gear-ratios
To figure out what you currently have and and what you might like. when I made all my changes including a new OD 6 spd I was able to get a 3.31 in fith but still had a 2.84 in sixth which gave me 2600 rpm @ 70 mph. very happy with end result. Good luck.
primary
25
36
final
32
70
which is a 3.15 final about 3000 @ 70mph
if i go 27 engine i get 2.91 final
28 engine i get 2.81 final
how much would those 2 finals drop my 70mph rpms?
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Joined: Aug 2008
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From: Ohio
Road Warrior
Joined: Oct 2011
Posts: 1,376
Likes: 36
From: Round Rock, TX
Looks like about 2760 and 2670, figuring 8% and 11% ratio drops respectively. FWIW, my ratios are the same as yours, and I run my bike 80-85 literally all day long. I'm talking 500-800 mile days. She is very happy at those revs. I think 85 is about 3400rpm. I wear earplugs to help with fatigue....... It's a thought.
