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Author
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Topic: any dirtbike guru's?
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9cobra9
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Member # 4470
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posted
 
 
i have a kx 100 that i havent ridden for a while. when i try to kick start, or push start it it doest start. however, every time i change the spark plug it starts. what could be wrong? ty
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Red 1999 Cobra #1227
cai, bbk headers, offroad h-pipe, short shifter, 3.73's, magnaflow mufflers, LTW flywheel and 04 cobra clutch,
co-owner of PWA
Posts: 1145 | From: Fremont | Registered: May 2004
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Jdub07
( O Y O )
Member # 2728
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posted
gonna take a guess and say that the spark plug is getting fouled after every time you start the bike. I'll ask my neighbor he's into bike and dirt bikes.
Posts: 7282 | Registered: Apr 2003
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9cobra9
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Member # 4470
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posted
thanks
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Red 1999 Cobra #1227
cai, bbk headers, offroad h-pipe, short shifter, 3.73's, magnaflow mufflers, LTW flywheel and 04 cobra clutch,
co-owner of PWA
Posts: 1145 | From: Fremont | Registered: May 2004
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66 AC COBRA
Nitrous King
Member # 904
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posted
quote:
Originally posted by 9cobra9:
thanks
are you trying to run it on the old gas in the tank, drain all the old gas/oil and put in a gallon or two of fresh gas/oil, take out the sprak plug and clean it
kick the motor over a few times without the sparkplug in it, before doing this spray a little bit of carb cleaner into the chamber through the plug hole
put the plug back in, get it running, and ride the shit out of it, keep in on the pipe and running real high to clean it out
if this doesnt work, its time to take the carb apart and clean all the dirt/crap out of it
how long has it been sitting
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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9cobra9
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Member # 4470
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posted
well, even when i was riding it quite frequently it did the same shit, but its been sitting for like 2-3 months
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Red 1999 Cobra #1227
cai, bbk headers, offroad h-pipe, short shifter, 3.73's, magnaflow mufflers, LTW flywheel and 04 cobra clutch,
co-owner of PWA
Posts: 1145 | From: Fremont | Registered: May 2004
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Lonewolf
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Member # 4968
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posted
sounds wet... maybe the float level needs to be set or it is too rich... either from someone jetting it wrong and setting the neddle at the wrong level..
Posts: 46 | From: NorCal | Registered: Oct 2004
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9cobra9
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Member # 4470
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posted
quote:
Originally posted by Lonewolf:
sounds wet... maybe the float level needs to be set or it is too rich... either from someone jetting it wrong and setting the neddle at the wrong level..
mhm... well, i thought that i mixed it with the right ratio, but what is this float level that u speek of?
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Red 1999 Cobra #1227
cai, bbk headers, offroad h-pipe, short shifter, 3.73's, magnaflow mufflers, LTW flywheel and 04 cobra clutch,
co-owner of PWA
Posts: 1145 | From: Fremont | Registered: May 2004
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Lonewolf
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Member # 4968
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posted
Your carb has a float bowl... if you remove it.. you will see it has a float inside with a lil tab that presses againt a needle valve when it is full of fuel... So 2 thing to check.. the level when the bike is not running but you turned the fuel cock on, if that is ok... check the needle that is suppose to seal off the fuel entering the bowl .....
Posts: 46 | From: NorCal | Registered: Oct 2004
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Lonewolf
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Member # 4968
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posted
Here let do a check list...
new fuel with HIGH quality 2 stroke oil, mixed at 50 to 1...
Spark plug for that model (NGK)
Then do a carb check.. clean it.. and look at the various things I listed before.
If everything checked out the final thing I can think of is a weak spark.
Hope this helps.
Posts: 46 | From: NorCal | Registered: Oct 2004
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Dubc
New Member
Member # 5466
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posted
check your jetting on the bike...in the carb there is a needle that has to be changed due to altidude, temp...sounds to me its running rich and fouling out plugs...your mixture is to rich have to lean it out.
Posts: 3 | From: Bay Area | Registered: Mar 2005
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9cobra9
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Member # 4470
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posted
thanks a lot you guys. im not going to work on the bike for a while, but when i do, ill let you guys know how it went. ty again for info
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Red 1999 Cobra #1227
cai, bbk headers, offroad h-pipe, short shifter, 3.73's, magnaflow mufflers, LTW flywheel and 04 cobra clutch,
co-owner of PWA
Posts: 1145 | From: Fremont | Registered: May 2004
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need-a-cage
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Member # 5415
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posted
I'll bet you are mixing the gas too rich. Double-check what the mixture should be. Most likely somewhere between 40:1 and 50:1. If that doesn't work, get rid of it and buy a 4-stroke! Ha ha!
Posts: 606 | From: Santa Rosa | Registered: Mar 2005
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