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Post by scout4924 on Mar 30, 2012 18:23:55 GMT -5
Im in the process of wiring up my 650D (77). I replaced the start button and got resistance when its pushed. I was checking it inside the housing prior to mounting it. After mounting it I went on to the other switches and did'nt get resistance at the engine/frame but did at the throttle housing and screws. Is that telling me I need to ground the handlebars some how?
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Post by preston on Mar 30, 2012 18:42:50 GMT -5
Yes.
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Post by speez on Mar 30, 2012 18:46:47 GMT -5
I'm not 100% sure but i don't think they need it because the bars sit with rubber bushings and the neck has bearings that doesn't make a good ground even if the bike was new, bike manufactures would run a real ground wire if need be from body,you might have a nother problem
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Post by preston on Mar 30, 2012 19:48:01 GMT -5
Guys,,
I confess, I am not sure what is correct,,
I have a 75 and 77 XS, both have a black wire that is bolted down to the triple tree , (or under a gauge mount bolt ) and the other end, is sandwiched between the bottom of bar and top of the bottom clamp. ( this is out of sight, unless you are looking for it )
Now whether this is factory or not, I have no idea,, I just know my experience, when i forgot to ground my bars, nothing seemed to work right. (electric-light-wise)
Best to you,,
Preston
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Post by scout4924 on Mar 30, 2012 22:54:52 GMT -5
I thought there might have been a ground wire comming from the left switch housing which I'm not using.
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Post by 10ecjed on Mar 31, 2012 7:20:48 GMT -5
The left switch housing is where my ground is on an 80 650G.
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Post by Burns on Mar 31, 2012 21:13:59 GMT -5
The bar perches are rubber mounted; the wire attached to the bottom of them must be plugged into a wire that runs to ground if you are to use the bars as a ground.
The switch housing uses the bars as ground. That requires metal to metal contact (switch housing to bar). If your bars are powder coated you have no metal to metal contact there.
You need to sand a bare spot in the bar so the switch housing can touch the metal of the bar, or run a wire from the housing to a good ground.
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Post by Burns on Apr 1, 2012 13:17:36 GMT -5
oh yeah, same goes for where the bar touches the perch clamp. You need metal to metal contact there too if you are going to use the bars as a ground; so make a shiney spot on the bars where they touch the clamps.
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Post by scout4924 on Apr 1, 2012 20:37:26 GMT -5
My plan is to run a ground inside the wire loom up to the switch housing and put a terminal connector under the housing screw.
Another Question..............
I worked on it today and got some things sorted out. But.... The start button only drives the starter if the kill switch is in the run position. Is this nornal?
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Post by xsleo on Apr 14, 2012 19:12:43 GMT -5
The earlier bikes used a ground wire from the riser bolt around to one of the tree clamp bolts. On the later models they run the ground from the left housing into the headlight bucket to the wiring ground.
Running a ground wire from the housings to a frame ground is a good idea. But you still need to clean off the powder coating off the bars under the housings. The horn button and the starter button when pushed make contact right to the bars to ground. The powder coat prevents this from happening.
And yes the starter only works when the kill switch is on. Designed that way so you won't run the battery down cranking the engine trying to start the bike with the kill switch off.
Leo
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