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Author Topic: 1986 KX125 Gearing  (Read 2075 times)

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Offline thooker515

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1986 KX125 Gearing
« on: April 09, 2011, 02:00:22 PM »
For new chain and sprockets, I went to 13/48 gearing for my daughters 1986 KX125 vintage MX which is the same as her  2009 KX250F?  Anyone know if that gearing will work? :-D
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Offline byron909

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Re: 1986 KX125 Gearing
« Reply #1 on: April 11, 2011, 08:36:53 AM »
all my 125s always liked something in the 51 range in rear, 12 in front. your 13/48 sounds  tall for 125.
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Offline Openclass

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Re: 1986 KX125 Gearing
« Reply #2 on: April 12, 2011, 02:31:04 PM »
I'm running 13/51 on my yz125. It was my son's bike, so I geared it down to that because he was having trouble getting it started form a standstill. It may be a little slower on top end speed but it will be a little quicker.
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