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Dirt Bike Discussions By Brand
Kawasaki MX & Off-Road Dirt Bikes
KX85 engine vs KX100 engine
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[QUOTE="Demmers1, post: 1441510, member: 128549"] Over a year ago I picked up a 2001 kx85 for $200 off a buddy, the top end needed redone. After a few months of sitting I decided to tear it apart after opening up the top and I realized the piston was shot the cylinder head needed rebored and the connecting rod was heated so hot that you could see discoloring in the steel so immediately I knew I needed a new bottom end. About another month goes by account was searching online for a new or used bottom end, later I found on eBay a used/new rebuilt 2006 KX 100 bottom end for $250 bucks, as most of the motors I seen brand-new were around $570 so I decided to go with this motor on eBay. In my manual it states a KX 85 and the 100 so based off my Assumption I figured the 2006 kx100 would fit up with my 85 top end, once the bottom end arrived I went to my local shop with my top end to have it measured for a piston, they immediately told me It needed to be re-board grrrr!!! At this point I just wanted the bike done, I purchased a new factory stock kx 85 top end jug from Kawasaki on eBay $300 and a namura piston kit. I swapped everything over from the 01 kx 85 jug to the new jug, power valve, reeds etc. I went to swap the stator plate over from the 01kx85 to the new 06kx100 and it would not fit.... This is when I found this forum to realize 2005/2006 they changed the stator plate and flywheel. I purchased on eBay a used 2008 kx 100 stator, flywheel,ignition coil, cdi box and shut off switch for $120 after putting it all together the moment of truth was about to happen...will it start, will it blow up having a 100 bottom end and a 85 top end??? I gave it a few twist of the throttle and gave it one good kick and it fired right up!!! No adjustments needed. I have about 3hrs on the motor and no problems at all!! I built this bike for my wife to learn to ride on and needless to say she is absolutely terrified to ride it after watching me ride it I'm a 31yo 180lbs and this bike pulls me no matter where I want to take the bike, hill climbs, local race track, in the sand, no matter what this bike out performs beyond what I thought it would!! No other mods have been done to the bike, all 100% 01kx 85 besides the bottom end and electrical system. For a you kx builders I hope this has helped you out. [/QUOTE]
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Dirt Bike Discussions By Brand
Kawasaki MX & Off-Road Dirt Bikes
KX85 engine vs KX100 engine
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