Maintenance & Technical > KX500 Aluminum Frame Conversion (AFC)
'09 500AF build
bakes1983:
G'day guys I am in the process of doing the conversion. Was wondering if anyone could tell me the degree u set the motor to? I was thinkin if this was wrong it would throw the handling right out the window. I could be wrong though. Thanks.
jBernard:
the lower the engine, the better it will handle. i made my engine mounts with just enough clearance for the engine bolt to be able to get a socket on the end.
the FMF ktm/kx5 that was in the magazine, they recessed the engine mounts in the actual lower frame rail. they had the benefit of working with steel, but it looked like sh*t fab wise. no idea how much of a difference it actually made in the long run though. and no idea where they got that idea as i havent seen it done on any other bike.
I also tilted my engine back enough to be able to get access to the kips plate on the front above the exhaust manifold so i could service without having to take the engine out.
bakes1983:
Thanks For your reply that's Interesting them cuttin into the frame, bugger that. I will try keep the 500 as low as possible to try help handling as much as I can. Would a 450 swingarm help u think? Just being that tad bit longer. Is yours a 250f frame?
jBernard:
a 450 frame will have a bit more room in the engin ebay, as well as the swingarm being a tad longer. i dont think much though, just a few mm if i remember correctly.
yes mine is a 250f. i got a great deal on the bike to start with, 450f's were about 1500$ more than what i gave for mine.
bakes1983:
And your 250f frame handles the power and suspension still works ok? I was also lucky I picked my 09 250f up for 1700 with Suposably a blown motor but all it needed was a cam chain and re timed. Then it run a treat. Sold that motor now and the 500 is going in :-o
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