SOHC.co.uk Forums > CB350/400
Occasional stall it idle...
K2-K6:
--- Quote from: Mikep328 on August 15, 2026, 07:18:09 AM ---Good info guys, thanks!! I'll check out the carbs AND the actual RPM!! :)
Am I correct that reading "frequency" across one set of points would indicate 1/2 of engine RPM? IOW, double that reading would be actual engine RPM?
--- End quote ---
It should be direct as the points cam lobe is not geared to crankshaft (as in a car distributor @ 1/2 speed, and needing correction) in these engine either of the points directly represents actual crankshaft movement.
Mikep328:
Thanks! I was never good at math anyway!!! :)
K2-K6:
--- Quote from: Mikep328 on August 15, 2026, 11:07:31 AM ---Thanks! I was never good at math anyway!!! :)
--- End quote ---
You were right though, in a way. Old car type multifunction meters for dwell, tacho, voltage etc you'd need to set to 8 cylinder to read from these engine in many cases.
These Honda are effectively two twin cylinder engine "flying" in close company ;D two 360 degree twins 1&4 2&3.
Mikep328:
So if my (weak) math is correct, and the "distributor" cam is spinning at engine RPM, at red line (10,000RPM) those points are opening/closing more than 166 times per second. Holy moly!!! Is that even possible or have I grossly mis-figured?
McCabe-Thiele (Ted):
--- Quote from: Mikep328 on August 15, 2026, 12:28:24 PM ---So if my (weak) math is correct, and the "distributor" cam is spinning at engine RPM, at red line (10,000RPM) those points are opening/closing more than 166 times per second. Holy moly!!! Is that even possible or have I grossly mis-figured?
--- End quote ---
Yep 166.66 times per second for each set of points.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version