SOHC.co.uk Forums > CB750
No Spark
Saesneg Shaun:
--- Quote from: K2-K6 on May 05, 2022, 05:21:48 PM ---Wondering if the rod is backing out of the crank which will release the advance mech ?
If that's happening, then the securing nut may be reaching thread end before tightening mech properly.
--- End quote ---
The rod seems to be in rock solid. What is very worn is the large nut with the slot in the middle. Years of cranking the engine over on it has turned the centre oval. I don't know if you can just buy the nut?
Actually just looking at the cost of the advance unit/points/condensors on DSS I might as well do an electronic conversion!
Any recommendations? DSS unit or Boyer seem reasonable choices.
K2-K6:
Likely you'd get someone with a nut on here to help you out if you put request out for one.
Electronic, many use the advance mech to then run various levels of electronic switching.
Boyer is fully electronic, triggering, advance the lot and has very good reputation for performance and reliability also. Probably the most proficient if you're changing.
Unsure if Boyer needs that nut too, or has alternative.
Oddjob:
Sure I've got one somewhere, just need to find it.
CMS have them at 18 euros or so. DS don't stock them.
Saesneg Shaun:
Thanks for the help guys.
I'm totally fed up with messing about with the points so have ordered a Boyer Electronic Ignition kit.
I went for that one as it doesn't use the stock advance unit compared to the DSS unit and they have been around for donkies years.
Saesneg Shaun:
Just to update this I fitted the boyer electronic ignition today and she's running on all four again.
Its looks like my problem was the large nut had been used to crank the engine over and had gone oval in the middle. Even with the 10mm nut done up the big nut was still moving around. Fortunately the Boyer kit does away with the large nut and the points cam.
I have a bit of popping through the exhaust but i'm waiting for a strobe to be delivered then I can time it properly.
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