Maintenance & Technical > KX500 Original
Jetting!!! Again and again and again!
Hillclimb#42:
I have seen bad spark plug caps do that. Partially clogged main. Powervalve gummed up. And of course the almighy answer of "crank seals." Reed corners gone. Contaminates like water in the gas, but then you would also have popping and probably stalling.
sandman540:
Hey all. I got my cherry 95 K5 out after a long recovery of a broken right leg. I did a hotlap around my 15 acre woods and found that at 3/4 to wot it was flat and falling on its face. Upon removing the carb i found a tiny and i mean tiny piece of varnish on the needle jet and in main jet. A can of carb cleaner and a bit of elbow grease removed the offending goo. Reassembled,reinstalled the carb after inspecting everything, Holy Cow she is a missile now!. Back to 100% I just would like to give everyone a big thank you for having this site and all of the awesome technical info and advice. When the K5 is running great its a blast there is no comparison!! Sandman
Rude Riders:
Anyone here know about a DGH needle? Thats what i have in my 92 k5. I went ahead and ordered a N82M cause it seems thats what everyone is running with good results. Just didnt know about the DGH.
Thanks,
Ryan
livenlife699:
I Have a problem getting my bike to run properly in the top end, its almost bogging out..I have a FMF exhaust,vforce3,ported n polished cylinder with a wiseco piston jetted now with a 175main 58 pilot and needle on the 2nd clip from the top. It runs much better than before with the 168main at 3clip on needle but it will not got past 3/4 throttle so im a little confused at the moment as ive been playing with it for a few days. Should I go more gas since its +1 piston or...? Any suggestions would be appreciated for sure :|
jonny500:
i have no idea what jets you need to run but i can offer some carburation theory. you say the you are on a +1 piston. if the cc of an engine is increased then the volume of fuel/air pulled throught the carb is increased and as it is being drawn through the same size venturi (the carb is standard) the velocity of the fuel/air has to increase. if velocity is increased then pressure in the venturi is lower. so in theory the jets would need to be reduced in size if running a larger piston. however 1mm on and 86mm bore would not make much difference
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