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Post by badfish888 on Dec 31, 2017 19:38:38 GMT -5
140 psi, and held for a bit.
This really makes no sense. Hooked up to a car battery
The bike will crank all day long, Twisting throttle, starter fluid, nothing. 2 or three kicks. Fires right up. That doest add up. Ive heard of a kick stand saftey. I tried witg or without both kick stands and its the same. Will crank all day, but will only kick start. Its not the battery,
And runs fine when its warm. Same amount of power as when i put the bbk in. Valves are fine.
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Post by GrumpyUnk on Dec 31, 2017 21:46:20 GMT -5
IF you have a DC CDI, you might want to check your b attery voltage when cranking, and the B+ applied to the CDI module. Cranking can drop battery voltage, will, perhaps below that needed by a DC CDI.
If you have an AC CDI, then again check the cranking voltage. From what I understand, kick start rpm is higher than electric start cranking rpm, which might make the AC from the stator to run the CDI a bit higher.
Have you cranked the engine (kick) with the battery disconnected? That will tell for sure if you have a DC CDI. No battery == no spark with a DC CDI, but and AC CDI will spark when kick started. Pull the plug, re-connect to the plug wire and lay it on the rocker/cam cover, kick it over. You should see spark with key ON, no battery with an AC CDI.
tom
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Post by badfish888 on Jan 1, 2018 8:27:51 GMT -5
That made sense when i had my questionable scoot battery. But im using a deepcycle marine cranking battery.
So that would mean that little starter is taking so much power. That a battery with 700 CCA cant do that and fire a plug? And with no battery I have no spark with the kick start
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Post by RollingThunder on Jan 1, 2018 9:07:55 GMT -5
First thing I would do is check for spark while it's cranking with the battery. For this, I would get a second spark plug and leave your original in the head so it's cranking under compression. Then do the same thing kick starting it.
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Post by GrumpyUnk on Jan 3, 2018 11:11:38 GMT -5
I wonder if the brake safety switches are grounding the CDI, or interrupting the power to the CDI. If the kick start is used, the brake levers don't need to be compressed, leaving the brake light off, and the starter relay power cut, which may cut power to the CDI itself.
I think I'd put a meter on the B+ to the CDI, and watch while the brake levers are pulled to see if it goes to zero.
tom
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Post by lostforawhile on Jan 4, 2018 0:46:53 GMT -5
If the kill switch is on the cdi is grounded but no ground to the start solonoid or vice versa
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