Maintenance & Technical > KX500 Steel Frame Conversion (SFC)
KX250 Chassis With 500 Motor
don46:
--- Quote from: BigGreenMachine on March 30, 2007, 01:08:08 AM ---Cool!
Step one - split cases and drill rear motor mount on drill press
Step two - after installing the motor install the bottom motor mount bolt
Step three - cut front mounts off, bolt them to motor and line up in new position, tack then weld
Step four - fab top mount for new head stay
Very straightforward IMO.
Thanks for the pics, appreciate them.
I have fone three of these now, only 1 did I split the cases and drill the others it did while the motor was together, there are only 2 small areas that will have to be drilled maybe an inch on each side, the rest of it is hollow. I would cut the mount off the front before I tried to install the motor. Yea, I forgot about the pipe, that probably took the longest to get right, I used a KX 500 pipe and took the time to insure I didn't change any of the lengths. I have seen several with CR 500 pipes, most will say they work good, personally I've not tried one yet, I have one set up but haven't tried it yet. I looked at the Zip Ty pipe as well and thought it would be the easiest to modify. As far as taking the k5 on the track, I wouldb't be at all afraid to do it, it handles and feels like a 250. The 500 in my avatar is based on a 250f chassis, it handles like a dream, feels so light, but way to much fab work to get it right.
If you need any more pictures of something specific or questions, feel free to ask.
--- End quote ---
gwcrim:
--- Quote ---the stock stay must be cut off and either a bracket such as I have or none at all.
--- End quote ---
How safe do you think it would be to go w.out the head stay? The old time air cooled bikes didn't use them.
BigGreenMachine:
If you chose to leave it then reinforce your other mounts for the extra strain!
gwcrim:
Tell ya what. The only thing that's really keeping me off this job is the pipe. Everything else, I can deal with.
So what's the easiest way to handle the pipe?
don46:
If I would have known about the Zip Ty pipe before I did mine, that's the route I would have gone. I looks like the CR pipe requires some work as well especially if you don't want to take the ball pein to it to get it to fit around the water outlet and the kickstarter. I think the Zip ty could be used easily
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