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Andrews close ratio gear set

Old Oct 7, 2022 | 05:14 PM
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beckreit
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From: Austin Tx
Default Andrews close ratio gear set

I am rebuilding the transmission on 1947 Knucklehead EL - I was considering changing out the gear set to an Andrews close ratio set.

Does anyone have any experince with this set up ??

Thanks in advance.

rb
 
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Old Oct 7, 2022 | 06:08 PM
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From: la la land jerzey
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The close ratio is a real gift expensive but a gift

first and 3rd are in play - 3.0 is stock with a 22 trans sprocket 51 brake drum - first is wound out in 25 feet stock - your riding it so you get it

the andrews is a 2.60 first and we add a 23 trans sprocket yes it does not have the grunt but it does have more legs in MPH around 5 in first

but what is the big thing for me is the engine sound and tank shifting becomes the same engine sound the 3 gear changes as 3rd is in play in close ratio

its also kinder in the downshift hi to third you not jerked in the seat - we made it a go to for 1941 to 1976 the last of the real original trans
 
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Old Oct 9, 2022 | 07:43 AM
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Would you recommend this change ? This bike is a rider - Cross Country Chase race bike.
 
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Old Oct 9, 2022 | 07:59 AM
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I would. I did on my 62 and it made me wonder why the factory hadn't done it that way to begin with. You can actually get through an intersection without changing gears and getting rear ended by some anxious driver behind you.
 
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Old Oct 9, 2022 | 02:23 PM
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From: la la land jerzey
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Just install it and the trans will answer that question

24 trans sprocket will get the fuel mileage up and engine speed down

the key is engine speed - @ 50 MPH at 75 for over the road hi speed and long life
 

Last edited by johnjzjz; Oct 9, 2022 at 02:26 PM.
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