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KDX250 hybrid - what chassis?
Posted: 08:16 pm Mar 22 2011
by SS109
Just thinking ahead here. It seems the one downfall of the KDX250 was the chassis setup. I'm thinking of possibly building a hybrid using the KDX250 engine in the future.
So, what chassis would work for this? The KX125 like 200/220 hybrids or would I need to step up to a KX250 chassis? What about the KX250F/450F chassis? Yeah, I know the 4t bikes would need the frame cut and TIG welded for the 2t pipe but other than that, what other pro/cons to them?
Posted: 06:54 am Mar 23 2011
by KarlP
I think any 2000+ chassis can be made to work.
I personally think I would go with a steel frame if I was going to do another.
Posted: 06:58 am Mar 23 2011
by Tedh98
How much larger is the 250 motor over the 220/200?
Posted: 07:37 am Mar 23 2011
by Julien D
Considerably larger. The kdx200 engine was designed after an early model kx125 engine, the KDX250 engine is basically a de-tuned kx250 power plant.
I think you'd be hard pressed to fit it into a KX125. If it were me, I would look for a kx250 roller. Should be a relatively easy swap.
Posted: 09:41 am Mar 23 2011
by Tedh98
I would agree then on going with a 250 roller.
With the engine in place, there really isn't that much room between it and the downtubes near the exhaust.
Posted: 05:40 pm Mar 23 2011
by SS109
KX250 it is. Thanks for the input.
Posted: 08:41 am Mar 28 2011
by ldspowersports
How is the build coming along?
Luke
http://www.woodsriderparts.com
Posted: 11:29 am Mar 28 2011
by SS109
My 200 or the 250? The 200 is stalled right now due to my car taking a dump and the 250 won't get started until I find a reasonable priced roller sometime down the road. I can't hardly find KX250's around here. Lots of Yamaha YZ's though. Maybe a YZ-KDX250 hybrid?
Posted: 11:58 am Mar 28 2011
by Julien D
I think the YZ would be doable.
Posted: 12:10 pm Mar 28 2011
by SS109
Yeah, but where can I find green plastics for it!
Posted: 02:03 pm Mar 28 2011
by Julien D
No green, but black and white would look good!
Posted: 11:51 pm Apr 28 2011
by SS109
Found a good deal on a '06 KX25F chassis with a blown top end. (I can feel juliend cringing right about now!) Hey, the weight that year for the KX250 and F were the same. That would lead me to believe that the F frame is actually lighter than the KX steel since the 4t engine should be heavier than the 2t.
Anyways, trying to decide if I want to go with it or not. It would make an awesome hybrid for the KDX250 engine if it would fit. Anybody have a clue if it would? Also, I know the frame would have to be cut and welded, the radiator outlet on the left side would have to be modified, the usual engine mounts, and swingarm/rear case mods but is there anything else?