kx500 need help! - Kawasaki Forum :: KawasakiWorld.com
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post #1 of 4 Old 12-31-2012, 10:58 AM Thread Starter
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Join Date: Dec 2012
Location: nh
Posts: 1
kx500 need help!

hello everyone,
iam new to the forum and need some help with my 1989 kx500.iam having a hard time starting the beast. to help understand the issue il explain the bike. i bought it as a ice racer. it was lowered and had all the goodies. i converted it over the winter back to an mx racer. i was told i had to re jet the carb because it was jetted for winter not summer. i jetted to the fmf standards on the fmf website. it literally took me over 30 kicks to start it and about that everytime i start it now.it runs great but if i stall it or shut it off it dose the same when the engines hott. it often backfires while kicking it over every 6 kicks. ive brought it to a local shop where they checked electrical,timing and flywheel. a couple of my buds that are over 200lbs can start it within 10 kicks? the bike has fmf pipes, i think some engine work maybe a 540 kit? alot of money was put into this bike.trying to beable to ride the bike not look at it or almost pass out from kicking it.
carb settings
1. main jet 175
2.pilot 62
3.3rd needle groove
4. 1.5 out air screw
5.0-1000ft elev.

iam putting on v force delta reeds and moose spacer this week.
any info would help.
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post #2 of 4 Old 01-23-2013, 06:54 PM
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Join Date: Feb 2002
Location: Morehead City NC
Posts: 1,050
Hi brettkx,
I raced a 89 KX500 in 89 and 90 and it always started 3rd kick hot or cold and every time i crashed it.
couple of quick checks to look for.
Crankcase seals? check behind left engine cover for signs of leakage behind magneto and for right seal, has the oil in the transmission increased in level.
Reed valves frayed? inspect.
plug check, is it running nice? should be light brown in colour, anything else then you need to investigate carb. Is it a stock carb or aftermarket?
Is the KIPS system functioning correctly? common problem with stripping the worm gears if incorrectly assembled.
Let me know how you get on with it.
I stopped racing my KX500 as the tracks got more technical and it became a liability, but i loved racing it. Mt 250 was as quick on twisty tracks, hills was another matter all together LOL
Regards Y'all

Ted Edwards

Speed kills play safe and buy a Honda!
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post #3 of 4 Old 01-24-2013, 07:11 AM
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Join Date: Jan 2009
Location: US of A
Posts: 377
The backfire has me suspecting ignition related. Sort of along the line of a sheered flywheel key. Was that checked? Also, if the bike idles poorly (high) an air leak, as mentioned, would be a problem.
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post #4 of 4 Old 01-24-2013, 01:46 PM
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Join Date: Mar 2003
Location: TEXAS
Posts: 729
Open up the A/F mixture screw a little and see if it helps....

not everyone is supposed to make it....
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