Motor starts, will not idle, and shakes - Page 2 - Motorized Bicycle

biknut · #11 01-15-2013, 04:13 PM

Here's an idea for you to check.

Make sure your magneto rotor in indexed correctly. It should look like this when the piston is at TDC, with the rotor keyway at 1 o:clock.

gokart25 · #12 01-15-2013, 06:37 PM

yeah it's like yours. I just checked it. At first I thought it was off, by moving the back wheel to TDC..It looked like my picture. then I put it in your position, and looked at the piston and it was TDC.

I have a sloppy video, I will try to upload it.

gokart25 · #13 01-15-2013, 07:15 PM

Ok, let me know how you think this sounds?
The video was hard to shoot, and is not very good.
Hope this link works.

http://www.youtube.com/watch?v=upN-U...yer_detailpage

biknut · #14 01-15-2013, 11:31 PM

Honestly from the sound, it doesn't seem like anything is wrong compared to the sounds I get out of my motors.

gokart25 · #15 01-16-2013, 08:41 AM

Thanks biknut. Friday is supposed to be warm outside and I'll give it a test ride.

gokart25 · #16 01-18-2013, 08:02 PM

ok I was able to get out an ride it today. I want to thank everyone that help post on this topic...Thanks.
It's not perfect, but it's better.
It's really slow starting off, shakes a bit, and acts like it is missing, but once it gets going, I'll bet that I'm going 25mph+.
What temp should the head be? (I bought one of those temp guns)
Do they make a 9 tooth front gear?

biknut · #17 01-18-2013, 08:15 PM

Quote:

Originally Posted by gokart25

ok I was able to get out an ride it today. I want to thank everyone that help post on this topic...Thanks.
It's not perfect, but it's better.
It's really slow starting off, shakes a bit, and acts like it is missing, but once it gets going, I'll bet that I'm going 25mph+.
What temp should the head be? (I bought one of those temp guns)
Do they make a 9 tooth front gear?

You do realize it's not going to run well till it the motor warms up? It takes a few miles in the winter.

gokart25 · #18 02-17-2013, 03:21 PM

Thanks to everyone that posted on my problems!!
I'm finally rolling, and it's much better.
Here is a list of things I did, from all the suggestions..
cleaned up intake, exhaust and transfer ports with dremel.
filed down the crank shaft key (offset), to advance the timing, it didn't take much, but this was the biggest/noticeable difference.
trimmed the piston skirt on intake side.

I have been taking my laser temp gun with me on my rides to check the head and header temps.