I got the bike running well yesterday. It took a complete carb rebuild but it is done. Now I am having a weird electrical problem.

The bike will start and idle fine, it even revs great. While letting it idle the bike just died. When it happened I noticed the temp gauge needle pinned to the right. I don't have the temp sensor hooked up, so I have no idea wtf is going on. When I try to start the bike, it acts as if there is no spark.

Any ideas?

It would be odd for both coil packs to be fcuking about so I would suggest maybe the CDI/ECU is to blame.

Can you connect the temp gauge sensor, if so and the gauge then reads ok then I suspect you might have a bad/no earth somewhere which is also affecting other things, like the ignition. The temp gauge might read full scale because it has power but the return to chassis is through some other electrical part and not direct to chassis.

An earthing fault innit?

My earlier response had a type, if you connect the temp sensor wire and the temp gauge STILL reads full scale then I would suspect an earth fault, for the reason stated above.

It does sound like an earth problem, but if you had the carbies off then you had the tank off too ,so it could be a trapped fuel hose or vent hose.
Dave

magg wrote:My earlier response had a type, if you connect the temp sensor wire and the temp gauge STILL reads full scale then I would suspect an earth fault, for the reason stated above.

If you'd said that in the first place, I wouldn't have suggested the CDI. You made me look silly

I am leaning toward earth myself, unless it is overheating and somehow knows to shut down. Can't imagine how because like I said the temp sensor isn't even hooked up. It isn't a blocked fuel line because I was running the bike off of a gravity bottle and not the fuel tank.

BTW, the temp gauge will max out if the sensor is disconnected, it's part of the fail-safe design If you're not running with it connected, you need to short out the connection block.

Good info. I plan on connecting it....the harness I have is like a two or three prong (can't remember) and the sensor is only one prong.