changing final drive ratio

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Nov 6, 2013 | 02:11 AM

#11

Homeward Bound

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Joined: Jan 2013

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From: Overseas

Quote:

Originally Posted by grbrown

Fitting a 24T compensator and 37T clutch will change that to primary of 1.542 and overall of 3.131.

If you leave the clutch at 36T (that is an expensive part to buy), but change the compensator to 23T your primary would become 36/23 ...

A 22T compensator will give you primary of 36/22 = 1.636 and overall of 3.323 ...

At which sizes do you have to change the length of the chain?

Or rather ...

At which sizes do you *not* have to change the length of the chain?

I see 21T kits come with a chain from $100 (requiring a 36-tooth clutch shell ... is that not standard size?).

Last edited by Homeward Bound; Nov 6, 2013 at 02:27 AM.

Nov 6, 2013 | 04:13 AM

#12

Ken Oaff

Tourer

Joined: Jun 2013

Posts: 272

Likes: 5

From: pomgolia

Quote:

Originally Posted by Dan89FLSTC

It is difficult to follow a thread when someone else interrupts the conversation.

Be considerate, start your own thread.

.

that is the nature of conversations on forums, threads do get hijacked from time to time

Nov 6, 2013 | 04:20 AM

#13

grbrown

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Joined: Jun 2007

Posts: 45,429

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From: Bedford UK

Hi HB! Chains come in lengths at increments of two teeth, so the stock chain will probably cover most popular compensators (crankshaft sprockets). The 21T SE kit I installed on my TC88 came with a shorter chain, but that is the smallest available. Baker has a chart to clarify the matter here.

Nov 6, 2013 | 05:24 AM

#14

Homeward Bound

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Joined: Jan 2013

Posts: 418

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From: Overseas

How much slack can the primary chain adjuster take up in people's experience?

Last edited by Homeward Bound; Nov 7, 2013 at 03:35 AM.

Nov 6, 2013 | 02:54 PM

#15

GraemeR

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Joined: Jul 2010

Posts: 853

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From: Melbourne

Use this website if you want to see what effect different gearing ratios do to your ride. It has several Harley's preloaded but it's easy to update with your specific model specs.

Www.gearingcommander.com

I have used this site for years and it's normally spot on!

Nov 7, 2013 | 08:48 AM

#16

grbrown

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Joined: Jun 2007

Posts: 45,429

Likes: 2,897

From: Bedford UK

Quote:

Originally Posted by Homeward Bound

How much slack can the primary chain adjuster take up in people's experience?

The difference between a 25T stock sprocket and a 22T! Quite a bit, IIRC some part of the tensioner can be reassembled to accommodate the extra slack of a smaller sprocket.