Hi fellas,
New to the forum but have been lurking for a while now. Anyway, I have a Very Slow cranking issue with my 2 stroke Alpha Sports 100 ATV. Any suggestions would be fantastic! I thank you all.for any and all suggestions on what I should do next. To me, it seems like even though the starter worked via the test I spoke of via the video below, that maybe it is struggling once the compression stroke comes around. Just a wild guess. Thanks again fellas!!
https://youtu.be/k768sfpp5qY

 

My video isn't showing on my end. Hopefully is for you all. Let me know. Thanks!

 

The starter and earth wires are not thick enough. Run a thick wire from battery earth to engine and another to frame. Run thicker wires from battery pos to solenoid and from solenoid to starter motor.

 

This is the stock wiring harness. Just curious why you say they aren't thick enough? Thank you @merryman

 

I just feel like it's a issue with slow cranking
Especially during the compression stroke
As I said before, I did bench test the starter under NO load and it spun fine and could turn by hand easily. I just wonder if it's possible if the starter could still be bad under a load? Thanks again fellas! I appreciate any help.

 

To add to my previous post.... Not only does it sound faster with the spark plug out, it also doesn't kill the battery quickly as it does with the spark plug in. Reguarldess of the battery. I'm sooooh puzzled. Helllllpppp.

 

You seemed to imply on the video that you have put a bigger engine in, if so it would need a higher power starter and thicker leads to it, Chinese stuff has below minimum wiring thicknesses. It could be a dud starter, it could be a dud battery, but those wires are too thin and wire is cheap, so I would start there.

 

Okay fellas. Any idea what this could be? I'm at a complete loss. I've triple cleaned the carb, reed valves look great, new reed valve gaskets, gas lid is venting, cleaned the fuel hoses and fuel switch and tank, carb float ia working as it should. But this is what it's doing. Any help on this??? Thank you all sooooh much!