Stator connection question

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Stator connection question by: onewheeldrive - Jul 19, 2016 16:57:53 GMT -5 via mobile

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Post by onewheeldrive on Jul 19, 2016 16:57:53 GMT -5

Some of these 139qmb engines come with stators that have only 2 wires in the big connector plug (with no ground wire in the plug). My wire harness and original stator both have the grounds in the big connector plug(s), which makes 3 wires at each big connector.

Here are my questions. I know if I hook up a stator without the ground in the big connector plug, my lights will blow (happened without knowing it would a few years ago). Why? What is different about my setup to where some scoots can run a stator with no ground in the big connector plug having only 2 wires instead of my 3 wires? Where are those stators being grounded then on these different setups?

I have 2 brand new stators (came installed on new engines) just sitting around because I've reused an older stator to make it work properly.

Last Edit: Jul 19, 2016 17:00:00 GMT -5 by onewheeldrive

2005 Tank Urban Sporty
139QMB engine

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Stator connection question by: lain - Jul 20, 2016 9:50:21 GMT -5

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Post by lain on Jul 20, 2016 9:50:21 GMT -5

Could be the fact that the stator grounds directly to the engine case on 2 wire stator (yellow and white). I've made it a habit to ground from the engine case to the ground wire in the stator connector when using these. Without doing so often times lights are dim at low rpm and I have super bad night vision so I like as much power to the lights as possible. I also run floating grounds between the point where the case ground connects to the frame and the grounding wire for the lights near the bulb(s) when in doubt.

Last Edit: Jul 20, 2016 9:53:41 GMT -5 by lain

onewheeldrive PM onewheeldrive onewheeldrive's Posts onewheeldrive's Threads Senior Rider Currently Offline Posts: 1,160 Likes: 134 Joined: Mar 2, 2013 23:42:27 GMT -5	Stator connection question by: onewheeldrive - Jul 20, 2016 18:48:32 GMT -5 via mobile Reply Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by onewheeldrive on Jul 20, 2016 18:48:32 GMT -5 Wouldn't they all ground to the case that way?
	2005 Tank Urban Sporty 139QMB engine

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Stator connection question by: lain - Jul 21, 2016 13:59:19 GMT -5

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Post by lain on Jul 21, 2016 13:59:19 GMT -5

Jul 20, 2016 18:48:32 GMT -5 onewheeldrive said:

Wouldn't they all ground to the case that way?

It's a good thing to have all the grounds connected, they are designed with all the negative/ground wires from everything to end at the frame anyways. They are meant to all be connected. More grounding the better, go crazy man, I have 6 ground wires on MY engine hahaha. And at least one extra from everything else to the frame, you should see the stack on my frame grounding bolt! I've effectively reduced the risk of grounding failure for the life of the bike, made it almost impossible haha.

Last Edit: Jul 21, 2016 14:01:17 GMT -5 by lain

Stator connection question By onewheeldrive (Read 1,330 times)

Post by onewheeldrive on Jul 19, 2016 16:57:53 GMT -5

Post by lain on Jul 20, 2016 9:50:21 GMT -5

Post by onewheeldrive on Jul 20, 2016 18:48:32 GMT -5

Post by lain on Jul 21, 2016 13:59:19 GMT -5

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