Maintenance & Technical > KX500 Steel Frame Conversion (SFC)

DK 2007 kx250/500 sf

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zz3gmc:
After decades of racing enduros on mostly 250s a few 200s and a 125 I find that my 500 hybrid is the best bike Ive ever had! It handles almost as well as when it was a 250. Eats up whoop sections better than when it was a 250 and handles bar banging tight woods extremely well! My engine is pretty much stock with the exception of a heavy flywheel weight. Its geared 14/51 which allows me to pull taller gears and smooths out the power delivery quite nicely. Im usually less tired after racing the 500 than when on the 250, its allowed me to relax more and concentrate on the trail.

ID KX500:

--- Quote from: zz3gmc on March 29, 2014, 01:00:23 PM ---After decades of racing enduros on mostly 250s a few 200s and a 125 I find that my 500 hybrid is the best bike Ive ever had! It handles almost as well as when it was a 250. Eats up whoop sections better than when it was a 250 and handles bar banging tight woods extremely well! My engine is pretty much stock with the exception of a heavy flywheel weight. Its geared 14/51 which allows me to pull taller gears and smooths out the power delivery quite nicely. Im usually less tired after racing the 500 than when on the 250, its allowed me to relax more and concentrate on the trail.

--- End quote ---

So nice to hear,, this is why I have used mine for a trail bike.

splatter:
finaly got some time to make a little progress in the garage :)


cut the swingarm to the width of the engine and got it mountet




put in a 0,7mm feeler gauge in between on the picture here


but is that enough distance? as you can see there is a little more room tha 0,7mm mayby around 1mm or so, but will it be enough?

splatter:
Got the intake mountet too but not really happy about the angle :/ will the angle give me a problem ? thinking of float level or over floating maybe?






Another expert question  :-D : is there different dimensions from old to newer engines exhaustport outlet ? thalking about the outside diameter off the pipe header.
bought an old pipe that i cut up and i think its going to fit nicely on the bike (it has a SPES sticker om the silencer)
the diameter on it is smaller than the stock 86 exhaust?

its pretty rusty now but not rotten ;)



motopunk:
nice progress... :-)   you have only to clear, that the swing arm can move free up and down without contact to the engine case... what i can see in your pics is ok and would work correctly...

but you need a bigger washer to hold your kickstarter on the shaft...  :wink:

what exhaust is this? looks like 250.. exhaust ports from 86-2004 kx500 are all the same 55mm outer and 49,5mm inner diameter


clearing your carb holder problem is this way: make a spline like i did on my bike, that the carb lines up perfect to carb boot und it would give perfect clearance also to the gas tank... my spline is 10mm to 2mm ,


http://img.webme.com/pic/d/der-motopunk/foto0318.jpg

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