SOHC.co.uk Forums > CB750
Carbs Install
Nurse Julie:
--- Quote from: Martin6 on March 25, 2023, 06:49:12 AM ---Odd job,
Yes, I understand that, the issue I have is that the white plate you mention was separate from the copper live tab (what the black wire is soldered on to). So even when fully assembled, white housing screwed down, the pin of the button nicely through and sliding into contact with the yellow/Red plate, the copper live tab was just pushed against the Y/R plate by the button spring and starter remained on.
I must have assembled it half a dozen times on the bike, but when I took it off, I could see no way to stop the live plate from moving under the springs pressure into the Y/R plate. I assume that live plate should be firmly fixed in the white holder, so they were a single unit holding it firmly against the spring pressure. Mine had separated, broken. So that 50p part caused my problem!
--- End quote ---
Sounds like someone tried to re solder the wire on and it got too hot, which melted the plastic.
The switch you have is very rare and hard to find, only fitted to UK / european K6's. Trigger has loads of switch gear parts here. If you send me your old rare switch, i can fit some parts and it will be as good as new FOC.
It would be a shame to lose a original part for the sake of one small part and 10 minutes work.
Sesman:
Hey, good on you Julie👍
Martin6:
--- Quote from: Nurse Julie on March 25, 2023, 07:56:10 AM ---
--- Quote from: Martin6 on March 25, 2023, 06:49:12 AM ---
Sounds like someone tried to re solder the wire on and it got too hot, which melted the plastic.
The switch you have is very rare and hard to find, only fitted to UK / european K6's. Trigger has loads of switch gear parts here. If you send me your old rare switch, i can fit some parts and it will be as good as new FOC.
It would be a shame to lose a original part for the sake of one small part and 10 minutes work.
--- End quote ---
What an amazing offer. Very kind. I have a replacement on order, which I don't mind using. But, if it is not correct, I will take up your kind offer. 👍 I'll find out in a week or so.
It may well have been my fault, that bottom wire retaining plate was missing and the wire was hanging on by a couple of strands and I did try a repair in situ. That probably damaged it. Lesson learned (again!).
--- End quote ---
Nurse Julie:
--- Quote from: Martin6 on March 25, 2023, 09:38:28 AM ---
--- Quote from: Nurse Julie on March 25, 2023, 07:56:10 AM ---
--- Quote from: Martin6 on March 25, 2023, 06:49:12 AM ---
Sounds like someone tried to re solder the wire on and it got too hot, which melted the plastic.
The switch you have is very rare and hard to find, only fitted to UK / european K6's. Trigger has loads of switch gear parts here. If you send me your old rare switch, i can fit some parts and it will be as good as new FOC.
It would be a shame to lose a original part for the sake of one small part and 10 minutes work.
--- End quote ---
What an amazing offer. Very kind. I have a replacement on order, which I don't mind using. But, if it is not correct, I will take up your kind offer. 👍 I'll find out in a week or so.
It may well have been my fault, that bottom wire retaining plate was missing and the wire was hanging on by a couple of strands and I did try a repair in situ. That probably damaged it. Lesson learned (again!).
--- End quote ---
👍👍👍
--- End quote ---
Martin6:
The aftermarket switchgear arrived and was surprisingly decent. The only issues were:
- different wiring colours, but several of the black wires had thin tracer lines and I was able to match them;
- the wire length is longer, suitable for US bars. I pondered cutting and reattaching the connectors, but chickened out. It is currently coiled within the headlamp bowl. I'm hoping there is sufficient space to avoid it pressing any connections apart.
I took the bike for a short warm up ride, then failed to dial the carbs in any better on just the pilot screws.
- still lumpy idle below 1500rpm
- slight hesitation opening the throttle from low revs, then pulls ok.
I think my cam chain is still loose. At low revs there's a bit of chain lash noise. So gasket needed and I'll remove the tensioner to check if it is free. Hoping desperately it's not the primary chain, but with 40,000 miles on the bike, i guess it could be.
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