Maintenance & Technical > KX500 Original
Jetting chart
gwcrim:
Paul.... where did the jetting chart come from that you have on the front page?
Paul:
From the formulas in the manual that came with my 2001.
Those combo's will get you in the ball park and from there you may need a jet size up or down, or a needle change up or down to fine tune it or your bike maybe mod'ed to the point that the volumetric efficiency is higher than the 85% that is assumed in my chart. Coming from a race background I'm sure you've seen the cars / bikes with close to 100% volumetric efficiency at which point the jetting changes DRASTICLY :lol:
--- Quote from: gwcrim ---Paul.... where did the jetting chart come from that you have on the front page?
--- End quote ---
The long and short of that chart is that it is a starting point.
gwcrim:
Well I have a 60 slow jet now. In order to get any idle (with 0-2 turns on the mixture) I have to have the idle speed screw in all the way. Definitely too rich. So I decided on a 58 but everyone around here has only the 55. So I ordered a 58. Safer to be too rich, I figure.
EZ-Rider:
This is not related to the topic but I am wondering what in the world have you done to get a sportster or any HD to run 180 mph? What type of fuel was used? What type of chassis? How long was the distance? Just curious......
gwcrim:
--- Quote ---...what in the world have you done to get a sportster or any HD to run 180 mph?
--- End quote ---
Nothing.... it was all stock. :shock:
Actually it had a 1650cc engine that made over 150 HP. The wheelbase is 70" and it's got a GSXR inverted front end. It did 180 in the standing mile at an East Coast Timing Association meet in Maxton, NC. We also took two records at Bonneville @ 167 MPH. The engine wasn't mine, though. It's now got a 1300 in it now that only makes 107 HP. but it still did 153 two weeks ago.
Take a look at some of the photo albums here:
http://briefcase.yahoo.com/gwcrim
It's for sale, wanna buy it?
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