SOHC.co.uk Forums > CB750
Carbs Install
McCabe-Thiele (Ted):
I believe it's the ramp to tension against the throttle screw on the throttle control - you can see the silver screw in the picture (second picture) - it gives you idle speed adjustment on the handlebars ?
They fall out of position easily when you undo the clamp.
Oddjob:
--- Quote from: Martin6 on March 23, 2023, 07:00:48 PM ---
--- Quote from: Nurse Julie on March 19, 2023, 07:27:10 AM ---We have our UK K6 on the ramp for it's yearly service. The UK K6 has the sprung screw fitted to the switch.
I have taken some pictures of the switch and a switch that has been taken apart so, you can see how the Yellow/Red and the black are connected .
--- End quote ---
Julie,
Can i ask a question on your photos?
Your 3rd photo shows a metal plate angled away from the starter switch, underneathe it? Screwed into the bottom of the switchgear case. I don't have that, but I do have a metal pin in the hole next to it in your photo, which locates into the handlebar, to stop the switchgear rotating. Do i need that angled metal plate? Or is it just a different version?
Many thanks,
Martin.
--- End quote ---
That's a cable clamp Martin, the wires pass beneath it and would account for why yours are fouling the bars and getting trapped.
Oddjob:
My switches are apart right now if you want a pic of how the starter button looks dismantled.
Martin6:
--- Quote from: Oddjob on March 23, 2023, 09:27:19 PM ---My switches are apart right now if you want a pic of how the starter button looks dismantled.
--- End quote ---
Further pictures would always help.
- I think it will be crucial to get the angle right on the wiring, so it routes into the bars without getting trapped.
- Also be good to see the assembled white plastic piece a bit clearer. I can’t currently see how that is sufficient to stop the copper tab it holds from being pushed into the positive connection in the switch.
Thank you.
I have the wiring out, headlamp loom all labelled up and string through the bars. I can see the insulation on the two switch wires has opened up where the wires were entering the bars, so possibly they were shorting. I also have a concern that the plastic piece that holds the copper negative (earth) tab steady against the spring on the button spindle, may be too worn to stop the spring from pushing the earth tab onto the positive contact patch. Will have to think of a way to hold it, if that's the case. Will hopefully be easier to check in the kitchen.
I will try to pull some length of R/Y and Bk through the sheath to get to sound wire for the starter switch. But may have to cut it open. Shame, because the sheath looks ok.
Thanks for your comments and help.
Martin
Nurse Julie:
I am not sure why you refer to a earth wire ? As the pictures that i have already posted have no earth wire ::)
Earth is the switch to handle bars. Black is live to the button and Yellow / Red is to the solenoid. The button is the connection between Black and Yellow sending a live signal to the solenoid .
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