Front/rear gear relationship - BMW Luxury Touring Community
 
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post #1 of 4 Old Dec 1st, 2011, 1:14 pm Thread Starter
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Front/rear gear relationship

Does anyone out there know about the relationship between the number of teeth on a primary sprocket to the rear sprocket. Somewhere along the line I was made to understand that it was about 1 to 4 (one up front being equal to 4 in the rear).
I'm working on the new to me '94 DR650. It came stock with 15t front and 42t rear. I put a 14t up front, but the gearing still feels too tall. I'm looking for more low end.
Can't go any smaller up front, so I'm having to look at a larger rear.
Any ideas would be appreciated.
Thanks, Frank
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post #2 of 4 Old Dec 1st, 2011, 10:21 pm
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Re: Front/rear gear relationship

Put a bigger one in back. My first Suzuki GT-750 had a 14 47 set up and I ended up going to a 15 in front to get more top end speed. My second one had a 14 43 and it was too tall no low end grunt. Go with a 47 or so should get you there.

John
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post #3 of 4 Old Dec 2nd, 2011, 1:06 pm Thread Starter
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Re: Front/rear gear relationship

All I could find for my bike was a 46T, so I ordered it. We'll see if that doesn't do the trick.
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post #4 of 4 Old Dec 2nd, 2011, 7:14 pm
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Re: Front/rear gear relationship

Going from a 42 to a 46 will most likely get you where you want to be. It is amazing how just a few teeth will make a big difference.

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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