KX 85 Question

buford61
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buford61
Edited Date/Time 1/26/2012 11:25am
My son rides a 2007 kx 85 with the stock small wheels. I am planning on changing out the wheels for the larger "big wheels" (19" front/16" rear). So that he might be more competitive in the "super-mini" class. Can I simply bolt the larger wheels on and be done, or are there more modifications I will have to make (i.e.: swingarm,sprockets,etc.)? Any help and/or advice will be greatly appreciated. Thanks.
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SteveS
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SteveS 9/15/2011 2:40pm
9/15/2011 2:40pm Edited Date/Time 9/15/2011 2:40pm
You can't just swap the wheels. You need the supermini swingarm as well, plus new brake lines.

If you aren't going to build the motor up to a 112, I think I'd just leave the smaller wheels.

And if you are going to do a real supermini, a used KX100 might get you there faster and easier.

Back when we did it on Yamahas (they don't make a supermini, just the kit to convert the 80/85) the swingarm and brake lines and necessary bushings etc. ran about $1100-1200, plus your labor. Wheels were on top of that.
buford61
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buford61 9/15/2011 2:48pm
9/15/2011 2:48pm
Steve, thanks for the info. I am going to look into it a little further, but with the cost involved I will probably stick with the stock wheels. My son is 13, he is already riding a 125 and a 250f a little, at best we will only get another year out of the 85 anyway! Again, thanks for the info.
424
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424 9/16/2011 1:50pm
9/16/2011 1:50pm
I bought a swingarm on ebay one time. It was listed as a KX85, but I knew KX minis at the time. I studied the picture good and compared the KX85 and KX100 in the shop. Sure enough it was from a KX100!!! Got it for $5.

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