Need help - STUCK

alec.korver

alec.korver

Been Around the Block
Anyways, I am doing an engine swap with my cb200. I had put a cb175 engine in it until I finished my 200 engine. The 175 engined just plugged right in and worked. Anyways, now that I am plugging my 200 engine back in, I have found that I have no power to the starter or the coils. My headlights, turn signals, brakelights, etc.. all work. And the other motor was just working fine, but my 200 engine seems to be getting no power. Possible causes? leads or linkages to look at? Thanks.
 
have you traced the wire from the battery to the starter? how about to the starter switch? maybe you've got a loose connection? Sounds to me like the first step would be to find out which circuit is not getting power. Start with the battery and a good wiring diagram, and test the path to the starter and coils. IIRC, there's not much between the battery and the coils besides the key. so maybe there's a short/missed connection there.
 
Yes I have good connection between the battery and the starter unit, all of them have good connections as it just worked with my other motor... I have even traced them and reverified connections. Still stuck.
 
okay so new problem. Besides starter still not working. I was able to get power to my coils, however when I am trying to static time it... The light only lights up for every 2 rotations of the motor instead of every 1 rotation... any ideas?
 
Use a wire of your own for now. Run a wire (jumper cables would do for testing) from the Neg. terminal of the battery to a clean metal engine part or bolt. If it works, then you know the problem is in the grounding. If not, start tracing wires, make sure they go where they should. But I agree with Alpha there, sounds like a ground issue.
 
Usually the engine ground goes directly from the negative terminal to a bolt at the rear of the motor (one of the bolts that hold the top and bottom cases together).

On a side note: if I'm not mistaken, the 175 motor is actually more powerful than the 200 motors.
 
Anyways, I have consistency to my points/coil now. However I do not have any power to my starter. I know I have good power getting TO my starter, however I do not know where it is grounded. Where is it grounded? is there a way to check if thats the problem.
 
If there is no ground cable connected directly to the engine, then it gets its ground through the engine mounts to the frame. Paint or rust between the engine and frame can interfere with the engine ground.
 
I had the same issue on my 350,
Tuned out the powdercoat on the frame was keeping the engine from grounding.
 
okay, well then I guess my next question is how is the starter wired to the starter switch itself? b/c my engine should be grounded fine.... I get spark and all other functions seem to be working except for the starter....
 
When you push the handlebar switch, does the starter solenoid click?
If yes, the handlebar switch is fine. If no, the switch on the handlebar is either disconnected, 12V not getting to it, ground wire from it not grounded, or switch is broken, or the coil in the starter solenoid is disconnected or bad.
When the solenoid clicks, is there 12V on the Big Lugs, both sides? one side is Batt voltage, the other is switched.
If you don't have 12V on both sides, the solenoid is bad.
If you do, then check for 12V at the starter lug when the solenoid is engaged.
If you have 12V at the starter, and it isn't turning, then the starter needs some love. Could be broken wire off 12V lug, which is common if you don't use 2 wrenches to keep the stud from turning.
Could be bad brushes that finally went.

Follow the power. 12v to solenoid coil, then solenoid coil to handlebar switch. Handlebar switch grounds wire, solenoid closes.
12V from batt to large lug on solenoid. Other lug on solenoid to heavy wire to starter...

If you follow the power, the problem is where it either doesn't have power, or has power and nothing is happening.
 
the solenoid is not clicking, all the linkages from the solenoid to the button seem fine. It was just working with the other motor... thats why I am so perplexed! Thanks for the tips, I am currently trying to find a way to isolate the problem. According to the wiring diagram, one of the wires from the starter solenoid goes to the rectifier... however from what you have stated, it can only be because of the wire that goes to the starter from the solenoid if its not clicking. The solenoid definitely has juice.
 
If it worked earlier, then I suspect you have a loose wire between the solenoid and the handlebar switch, or a loose connection on the ground wire off the handlebar switch.

Follow the wires.
 
Nevermind! got it figured out, it was the controls were not grounded well enough to the bars, and the bars were not grounded well to anything else.
 
THANKS FOR ALL THE HELP, time to see if this top end rebuild will make this engine run better than it did before!
 
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