Maintenance & Technical > KX500 Steel Frame Conversion (SFC)
KTM Frame
tschisi:
That?s exactly what i was talking about. :-D
The bike looks great, although i would swap to the two-stroke fuel tank.
Could you please post all the neccessary modifications?
Is that a cr500 pipe?
Kracer:
I did try both a 250sx, and a 250sxf fuel tanks. Neither of them fit nearly as well, as the 525 tank. Plus the 525 tank carries the fuel much lower than the other two tanks.
About the mods--On the engine, drill out the rear swingarm pivot mount through the cases to 17mm. And we cut off the top spigot the the head, and changed the angle, rewelded the spigot. This was very sano, that way the stock KTM 525 radiator hoses could be used.
On the frame--Cut off both the front motor mounts, and the bottom motor mounts, rewelded those mounts to accept the KX-500 engine. Cut off, and re-welded the mounts on the sub-frame to accept the KX-500 silencer.
The pipe is a pipe that I bought from Service Honda, made for their KX-500AF--Note:Service Honda did not want to sell me the pipe. (And they weren't very nice!) The only reason they did is because, I had purchased a bike from them in the past. I called FMF to see if we can buy pipes directly from them. They were very nice, but informed me that they sell the pipes to Service Honda only.--Maybe if we all call FMF that they will start selling us the pipes direct??--Just a thought--
I weighed both entire bikes, before and after the motor conversion--The KX-500 motor is 15 pounds lighter than the KTM 525 motor! The stock KTM 525sx weighed in at 244lbs--And after the conversion the KXTM weighed in at 238lbs.--The FMF Gnarly pipe is quite heavy for a 2-stroke pipe--And on both bikes I do use titanium motor mount bolts, shock bolts, and a swingarm pivot bolt.--These I purchased through Mettec--Great guys there--Kracer
PowerFiend:
Nice work. Though I do like the KTM's with orange frames like that, I think you should redo it in Green with matching graphics. :mrgreen:
What year/base bike Service Honda's did you have for reference?
tschisi:
Would be interesting if the cr500 pipe also fits this combination.
I think the k5 pipe is difficult to modify to fit this frame...
Kracer:
I had both a 2004 CR-500AF, and a 2007 CR-500AF. I felt like both frames were way to "small" for the 500 motors--I spent big money on springs, suspension work (Through MX-Tech) and considerable time testing these bikes--Plus we had to do alot of work to the bikes, when we recieved them from Service Honda--Chain alignment--
To be honest,(And I know this is going to offend alot of people out there, especially when they spend big money on their AF conversions) I don't think that I have ridden any aluminium framed bikes, that I would call "good handlers". Especially when mated to a 2-stroke motor. I have ridden some 4 stroke motored aluminium framed bikes that I thought were decent, but not "great".--But, this is my opinion--And, what I have noticed through my own trial, and error.
Like I said in an earlier post--to me it's all about confidence. And what I think is a good-handling motorcycle, some-one else might think is junk also.--Kracer
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