Maintenance & Technical > KX500 Original
q 16
Hillclimb#42:
Whats the reccomendation for jetting increase on a k5,stock, from Premium pump gas/Cam2, to the VP U2(or equivalent)? I have a 168 in it now. Same for a 250? Any other set-up issues? I race against plenty of VP-fueled bikes, but it seems like they are all jetted funny. REAL FAT on idle jet(in the hole in neutral). They sound loaded up. Then they sound lean on top end. They even pop some when at top rpm's. Is that normal VP traits? I play ride the same bikes, so is there any issues other than jetting to think about when switching back and forth between fuels? What about a 50/50 mix of Pump gas and VP? A waste of effort and cash?
mg82:
thats not bad i paid maybe $130 for 5 gallons shipped
puffy:
If you Paying that kind of money for race gas why not just run alcohol?On banshees their would be almost 20 % increase in power from race gas to alcohol.And its cheaper.Especialy if your running a hillclimber.Just my thought.
bigbellybob:
--- Quote from: puffy on May 12, 2008, 09:13:34 AM ---If you Paying that kind of money for race gas why not just run alcohol?On banshees their would be almost 20 % increase in power from race gas to alcohol.And its cheaper.Especialy if your running a hillclimber.Just my thought.
--- End quote ---
with alcohol you have to run it out of the bike with gas or it kills internals. you have to drill out the breather on the gas tank cap. get a bigger petcock and there is no jets available you have to get a good indexed dill set and drill your own jets. you also need a lot more timing advance more than the plate on my bike will turn even with slotting it. the idea has ran through my mind but i would just put NOS on it if i need that much more.
GDubb:
I heard something about crystalization on the exhaust side when running oxygenated fuels. You guys heard anything about that?
-G
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