SOHC.co.uk Forums > CB500/550
Setting idle speed dynamic timing on a 500.
McCabe-Thiele (Ted):
Quite a lot of mentions about checking the dynamic timing F mark at 2500 rpm for the full advance check - what is an acceptable idle speed for the lower timing mark ?
Not mentioned specifically in my manual.
Johnwebley:
I think somewhere I read 1,200rpm,
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K2-K6:
Original 750 manual asks for 850~950 rpm to check the lower end timing. I don't have the 500 copy, but should be viewable here via Ash's stash.
Also above 2,500 rpm for the maximum advance check.
The lower one shouldn't matter, that's if the mech is retracted reliably, as the full advance is the more critical for running to give torque without overstepping the total advance and risk complications from that effect. If the lower check is a problem, then it's mechanical not setting as you can't move this without altering the max figure.
Really just checking the maximum advance should be fine for reliable running at factory settings.
deltarider:
A CB500/550's advance begins at ~ 1150 and ends at 2300~2500 rpm.
McCabe-Thiele (Ted):
Thanks guys my engine idle is currently set at 1200, I can lower it to below 1000 but 1150-1200 sounds sweeter.
I've been tasked by SWMBO with other duties today so hope to check it tomorrow.
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