Maintenance & Technical > KX500 Original
Testomonial of my Stewart built K5 Motor
kx560:
Who did the port work?
stewart:
as i recall that motor has a cylinder on it that i had changed the port timing by lifting the jug and milling of the top of the cylinder by .050 its the same as riasing all the duration numbers ,, it had some slight clean up work done in intake booster ports .....
KX5MOD:
The only thing i done to the bike is retard the timing. Not because i needed to, but i read it on here....done that, & noticed it made the bike even faster.
Never tried it way on top before that, but i've been too 102 mph, & it was early on a straight....could of got a few more out of it,,,but she wasn't stable with the fender distorting........anything over 90mph,,,,& it is sketchy....lukily enough i can blow by 450's topped out with great ease, & can raise the front while doing it........them long wheelies about 2 feet off the ground are hilarious :-D
stewart:
the timing retard is a good thing for lots of riding styles gives good sustainable power and over rev
Polar-Bus:
Stewart,
Do you stack multiple base gaskets to retard the port timing?
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