Maintenance & Technical > KX500 Original
kx500 power opinions
jfabmotorsports.com:
--- Quote from: KX500freak on May 09, 2009, 09:43:09 AM ---thats a sad story ,but to be realistic :roll:
an aged pretty stock k5 delivers about 58 HP
a modded fresh 250 goes up to 50 HP or more
take the riders weight and skills ,there you go
it can be true in other words i think :|
--- End quote ---
220lbs K5 + 200lbs rider @ 58 hp = 7.24lbs/hp
210lbs ??250 +170lbs rider @50 hp = 7.6lbs/hp
You may have something wrong but if his tire is better than yours or if he has anything newer than a 1990 anything 250 2 stroke it will have a lot better traction than the K5. If he has 52.5 hp, and he could, you are even hp/weight and your but is kicked.
jfabmotorsports.com:
WOW Mick, I was writing my post and you beat me to it. You said a mouth full. I race mx and everything you said is true. I can get the power of the KX500AF to the ground but it is because of the modern geometry, holeshot device 15/50 gearing and a million practic starts....as you said.
JFAB
Mick:
Yeah I've spent much more effort trying to get power to the ground than I have spent trying to increasing it. Holeshot devices, good tire selections, a wide rim and strangely enough even a CR250 ignition have all increased my AF's performance more than any cylinder porting could ever have done.
tharden:
I am running a 120x90x19 tire. I think my gearing is one of my problems.
Mick:
14/48 gearing is definately not the prob fo sho.
...it's a rider problem :wink:
practice, practice, practice...
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