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Bike Cranks (No Start) Will Push Start Though

Old 08-01-2010, 08:04 AM
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Bike Cranks (No Start) Will Push Start Though

Hello Everyone. My 2000 Superhawk will crank and crank but will not start. I try it with choke, without choke, stand up, stand down, neutral and in gear with clutch to rule out safety switches. i crank it to a point that the battery dies. It seems to be cranking fast like it always does. If I have someone push start me then it fires right up. I think the starter might be taking to much juice from the coils or the coils are getting weak. Any ideas will be appreciated. thanks. Anthony
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Old 08-01-2010, 08:16 AM
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Start with the basics... You could have a weak battery/defective R/R meaning not enough charge on the battery to start, but enough to run...

When fully charged what voltage is the battery? Should be at a minimum be above 12.5V or else the battery is highly suspect... When running, what charge voltage at idle? And at 3000&5000 rpms?

Could also be the starter motor... All of theses are mote likely than coils...
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Old 08-01-2010, 01:03 PM
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After I trickle the battery for a few hours it reads around 12.4-12.6 range. It drops fast after cranking a couple times for a few seconds each. Probably down around 12 or so. I also did a few checks and the voltage from the convertor to the coils while cranking is 9.56 . The voltage from the ICM is a little over 11. I think both should be 12 at least to fire the coils. I'm thinking the convertor is bad or the battery lost amperage even though is shows decent voltage. I cleaned as many connectors as I could resaonably get to also.
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Old 08-01-2010, 02:31 PM
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The odds are on the battery, not the converter... Try hooking up a known good battery and trying again... Any 12V battery works, car/lawnmower/whatever... A larger battery will not harm the bike in any way...
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Old 08-01-2010, 04:48 PM
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Thanks. Will try Battery from car.
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Old 08-01-2010, 05:56 PM
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I doubt that this is 100% of your issue, but have you set the TPS to it's proper value? It can certainly make starting more difficult if it's out of spec.
-R
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Old 08-02-2010, 11:31 AM
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It bump starts really easy. Not sure if it would be the TPS. I can check that though if all else fails.
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Old 08-02-2010, 11:35 AM
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Got the battery load tested and it checked out ok. 206 cca 12.6 volts.
Hooked up car battery and the same result. Just cranks. No fire. I ground the plug against the valve cover bolt and didn't see any spark from the plug. I am only getting 11 volts with the key on to the coils. Shouldn't it be the battery voltage of 12.6? When I engage the start button voltage to the coils (out of the convertor) drops to the 10 range or high 9 range.
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Old 08-02-2010, 11:50 AM
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Can you pull a plug and see if its firing when you hold the starter button?
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Old 08-02-2010, 11:57 AM
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A load tester isn't really a good way of knowing that much about your battery... It's an easy test, not a good test...

But the car battery should have worked if all else is OK...
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Old 08-02-2010, 11:59 AM
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Have you gone through the test in the service manual? Ie the test to confirm the ICM connector and such?
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Old 08-02-2010, 12:17 PM
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If it was anything other than the battery you shouldn't be able to bump start it either.
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Old 08-07-2010, 07:12 PM
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THE POWER OF CONTACT CLEANER. So after being ready to sell the bike for parts I decide to pull apart every connector on the bike like I should have the first time. instead of just looking at them I sprayed them with electrical contact cleaner. Not sure what connector it was but the bike started of on the first crank. I was in the frame of mind that it had to be a failing part and not a small connector or wire. I would suggest that if you have an electrical problem that is hard to diagnose; dip the bike in contact cleaner the go from there. Thanks for all the help especially Tweety who helps a lot of people on this site with good advice.
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