Maintenance & Technical > KX500 Steel Frame Conversion (SFC)
2003 KX 250 SF Conversion
umberto:
I took Goliath out for a test ride on Sunday, and the carb is adjusted perfectly from open to 1/2 throttle. It's very crisp and responsive. Unfortunately from 1/2 to full throttle it bogs pretty badly. Thankfully it's just some tuning on the carb and no major parts. Foxx asked about the gas mileage, and it is pretty bad. We made about 20 miles yesterday and I would estimate I used about 3/4 of a tank or more to make those twenty miles, and that was using only half throttle and lugging a lot. I think the larger tank can't get here soon enough.
If you didn't read my ride story, the question of what stops a KX 500 was answered: The world's deepest rut. Of course Danger had to get a couple of pictures of it:
umberto:
I am closing in on my final mods before I blow the bike apart, powder coat the frame, get Larry to add a decompression switch, and add graphics.
I decided to try new springs on my bike, because I felt like the valving was pretty close. I got springs from Race Tech using their calculator to determine rate. I like that the spring is blue to match the rest of the accents.
I haven't had a chance to ride it yet, but I hope to sneak out Sunday morning. I did some tuning on the carb to fix the full throttle bog, so I'm anxious to ride it.
I also replaced the terrible seat cover that came with the bike.
I found this air stapler at Harbor Freight Tools. It was $21.99, and had wider staples than the other stapler I had. It worked pretty well for the money and made installing the cover a breeze.
All I have left to do is the oversized tank, which will be here Monday, and one final ride and I'll be blowing it apart.
zz3gmc:
Looking good! Im in the middle of a long awaited rebuild of mine!
umberto:
Post some pics, or it didn't happen. :-D
zz3gmc:
If I get a chance, I dont usually take pics of a rebuild. I'll definitely take some finished product pics. Cyl is out getting replated and the exhaust bridges welded up. Going to send the head to Larry for the decomp mod. May experiment with lowered suspension maybe a half inch. Freshen up linkage bearings. Paint and graphics etc. Been riding the wheels off of it since it was built in 11! I have a 24hr race in NY coming up in july and I really want to race it there. I raced my 07 250 there last year.
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