xr600 gearing question


5 replies to this topic
  • litng1

Posted October 09, 2007 - 08:06 PM

#1

Ive searched and havent found the answer to my ?.Got a 92 XR600r with stock gearing.To make the bike faster in say a drag race would a 13 Tooth front be better than the 14?
My mods are a wiseco higher comp piston,slip on and jetted 68/158 bike runs great as is.Dont care to much about running 100MPH in the woods.I want the bike to be faster from a dig and lower gears.Thanks:ride:

  • martinfan30

Posted October 09, 2007 - 08:27 PM

#2

Ive searched and havent found the answer to my ?.Got a 92 XR600r with stock gearing.To make the bike faster in say a drag race would a 13 Tooth front be better than the 14?
My mods are a wiseco higher comp piston,slip on and jetted 68/158 bike runs great as is.Dont care to much about running 100MPH in the woods.I want the bike to be faster from a dig and lower gears.Thanks:ride:


with a 13 you will definately take off quicker, but would run out of juice at 5th gear, maybe 55 mph. i smoke my dad on his xrl (he runs stock 15/45) with my 15/48. i get him up to about 60 mph then he slowly comes on and passes me.

  • cleonard

Posted October 09, 2007 - 08:32 PM

#3

The 13 is the easy way to try lower gearing. You can use the same chain. It will cause a little more wear. The chain has to bend more on the 13 sprocket. It will also wear the chain slider on the swingarm a little faster. Going with a 14 front and a larger rear, like a 52 or so. That will require a chain that is about 4 links longer.

The speed difference is only 7% so it's not a huge difference. If the top end was 85 before it will only drop to 80.

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  • martinfan30

Posted October 09, 2007 - 08:35 PM

#4

The 13 is the easy way to try lower gearing. You can use the same chain. It will cause a little more wear. The chain has to bend more on the 13 sprocket. It will also wear the chain slider on the swingarm a little faster. Going with a 14 front and a larger rear, like a 52 or so. That will require a chain that is about 4 links longer.

The speed difference is only 7% so it's not a huge difference. If the top end was 85 before it will only drop to 80.


and be very buzzy.

  • litng1

Posted February 23, 2009 - 09:39 PM

#5

What would top end be on XR with one tooth lower on front and my mods above?

  • cleonard

Posted February 24, 2009 - 12:00 AM

#6

Well 13/14 is about .928. If your bike did 100 with a 14, it would do 93 with a 13. My 600 never went 100, but it did do around 90 I think. The ratio is the same so if it's 90 on a 14, then it would be about 84 with a 13. It doesn't seem like much, but the difference at a 65 mph cruise is noticeable.





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