stalling with new cam sensor

[johnb]

just bought a myroad , installed a new cam sensor and it wouldn't run more than a couple seconds. what else should I look out for?

I used to have a xciting 400 before that had a bad stator, would this also be a possibility? or a bad spark plug? when I test rode this bike a month ago it was able to run at least for a couple minutes before dying.

[MJR]

Welcome on the board johnb. Do you live in Bloomington by chance? The cam sensor is the same part as the crank sensor just Kymco calls the replacement part a cam sensor. You probably need to pull the sensor you put in out, the old one back in, and put the new one in replacing the crank sensor. Here's a link to my post showing where the crank sensor goes. https://www.kymcoforum.com/index.php?topic=27274.msg191703#msg191703 Post up what happens after doing that and let us know or if you need additional help.

[johnb]

I'm in pasadena, I installed the new one in that spot same as in the picture by the right footpeg, is the there another location on the bike?

[johnb]

so heres where I attached the new cam sensor, and in my hand is the old one, I suppose if the other one is the same then I'll just move this old one to the crank sensor' supposing this one is good, didnt wanna tear it up again as it was a pain yesterday to remove, had to remove 3 panels a footpeg and the grab bar.

dont suppose you guys have a pdf file for the service manual on this do you?

[Stig / Major Tom]

so heres where I attached the new cam sensor, and in my hand is the old one, I suppose if the other one is the same then I'll just move this old one to the crank sensor' supposing this one is good, didnt wanna tear it up again as it was a pain yesterday to remove, had to remove 3 panels a footpwg and the grab bar.

dont suppose you guys have a pdf file for the service manual on this do you?

You might be interested in owning the Kymco service manual from Cyclepedia.com.. Current price for this official Kymco maintenance manual is @$50.
In my opinion, money well spent for an owner of any Kymco scooter.
Stig

[MJR]

so heres where I attached the new cam sensor, and in my hand is the old one, I suppose if the other one is the same then I'll just move this old one to the crank sensor' supposing this one is good, didnt wanna tear it up again as it was a pain yesterday to remove, had to remove 3 panels a footpeg and the grab bar.

dont suppose you guys have a pdf file for the service manual on this do you?

Yes that's the crank sensor, the cam sensor mounts in the valve cover. When you run the bike and it dies what code flashes on the check engine light? Link to post about codes here https://www.kymcoforum.com/index.php?topic=28895.msg200873#msg200873 .

[johnb]

I've never seen a cel on it.... was looking for it to throw a code I'll try again tomorrow, I put it on the trickle charge tonight, I'll see if it gives me a cel tomorrow will update this thread. thanks for the help.

[MJR]

When you start the bike and it runs, then dies the check engine light would flash out a code if it's a failure the engine computer monitors. Once it has flashed out the code three times it will self clear until it happens again.

[MJR]

I'm not sure if John will post back up or not but I did ask him if he got it fixed. The fix turned out to be the stator. Here's what was happening. Basically the bike would start and run until the battery voltage dropped below what the ECU needed and then shut off. This explains why there were no codes in the ECU and that over time the bike would run shorter periods over time as the battery was drained since the stator wasn't keeping it charged. Odd that the battery wasn't drained enough to prevent the starter from working or maybe it was and needed to be charged up. This is the second stator I know of causing the problem both of which had less than 5,000 miles on the bikes. So always check that the bike properly charges the battery before moving on to other things electrical.

[CROSSBOLT]

Thank you for the repair report! That makes perfect sense. Coupled with being able to spin an engine with a starter but no joy on getting a good  start if volts drop below 10.5 or so. Good to know how this turned out and the ultimate cause.