Bike wont start after new exhuast - 600RR.net
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post #1 of 5 (permalink) Old 05-17-2015, 02:33 PM Thread Starter
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Bike wont start after new exhuast

Just added a yoshi slip on to my 08 cbr and now it wont start. Not sure if they're related but after the install I started it twice without any problems, both times I ran it for 30 seconds to a minute. A couple days later I went to start it again and couldn't get it to catch. There's fresh fuel in the tank, charged battery, kill switch in the correct position. I hear the fuel pump come on with each attempt along with the two relays. There was spark but I replaced the plugs anyways to rule that out. Also the spark plug smells of fuel after a start attempt and I'm getting white puffs of smoke out the tail. Anyone have any ideas? I'm stumped.

Last edited by upintheair; 05-17-2015 at 07:20 PM.
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post #2 of 5 (permalink) Old 06-01-2015, 02:48 PM Thread Starter
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Problem fixed. Ended up being the Kickstand sensor just needed a good cleaning.
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post #3 of 5 (permalink) Old 06-01-2015, 03:36 PM
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Spark plugs were the first option to look into, but everything looks fine now.
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post #4 of 5 (permalink) Old 06-01-2015, 10:45 PM
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The kickstand sensor wasn't the problem. If the bike is in neutral, the state of the kickstand is irrelevant for starting. If the bike is in gear it will lock out the start button as well as the ignition.

You had fouled plugs. Next time hold the throttle wide open when you crank the bike, it will try to catch on the unburned fuel. After doing this a few times, start it normally.

For future reference don't run your bike for short periods then shut it off
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post #5 of 5 (permalink) Old 06-05-2015, 09:52 AM Thread Starter
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When I first was starting messing with it I had the same logic thinking that it shouldn't matter where the kickstand is while starting as long as it's in neutral. I replaced the plugs and tried the open throttle multiple times and got nothing. Tried push starting and even spraying starter fluid directly into the intake and it didn't even try to start. This lead me to think it had to be a sensor. There's 3 that I was going to address: Kickstand/neutral position and bank angle sensor. I started with the kickstand just by unplugging the connection up on the side of the bike and then tried starting again. Bike actually tried this time. A few more attempts and it started right up. So yes I'm pretty sure it was the kickstand sensor. Cleaned all the crime off it connected it back up and haven't had a problem since.

Last edited by upintheair; 06-09-2015 at 01:42 PM.
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