Gearing 13T vs 14T - speed question

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#11

04-17-2009, 03:36 PM

deej

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Mototune all the way baby!!!

#12

04-17-2009, 03:38 PM

deej

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Quote:

Originally Posted by doum

To me you loose 1 tooth out of 14, so 1/14=7% you just add 7% to your current rpm count at 65mph!
For the same rpm you should go 7% slower, from 65mph to 60.5 mph
So If you can run at 70mph with your 14 teeth you will be able to get to 65mpg with a 13th.

Of course all of that varies a lot if you are riding into the wind.

#13

04-18-2009, 06:30 AM

MaverickAus

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Quote:

Originally Posted by MADDOG07

My two cents
2007 KLX 250 NO mods as yet, Using synthetic oil 100mph!
I doubt she'll go much faster but hope it'll get there quicker and with out the 45/50 degree air temp needed for the stock carb to get me (200lbs) to 100mph.
Best o' luck Marc

What a crock o $#!T

#14

04-18-2009, 04:55 PM

GreenMonsta

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About 1,000 rpm for 10mph in 6th. With 14t 65=6,500rpm 13t 65=7000rpm. Changing tire sizes and even having a worn tire compared to new will throw off gear ratios and the speedo a bit. Running a 13t now and it's good for trails and around town.