SOHC.co.uk Forums > CB350/400
A tappet mystery
Athame57:
Cylinder numbers 1-4 are simply counted left to right? I'm sure they are but I can't find anything in the manual to confirm. I did my tappets today because of a clicking sound from the right side top end, didn't have any problems until I tried to get the feeler gauge under the number four (?) inlet valve, I just could get it to do that until I slackened things of like I thought the tappet might get unscrewed, but when I did and set it I thought problem over and closed up the patient. Start engine and clicking is much louder, I'll have to try again tomorrow. Mein gott vot haf I done? ::) Any ideas?
Erwin83:
Sounds like you have tried to set the valve clearance while the cam was keeping the valve open, and how the clearance is way (WAY) too large.
You can only set valve clearance (tappet adjustment) when the cam is pointing away from the valve, you have to rotate the engine in order to get to that point for each valve.
Athame57:
--- Quote from: Erwin83 on September 02, 2021, 04:16:29 PM ---Sounds like you have tried to set the valve clearance while the cam was keeping the valve open, and how the clearance is way (WAY) too large.
You can only set valve clearance (tappet adjustment) when the cam is pointing away from the valve, you have to rotate the engine in order to get to that point for each valve.
--- End quote ---
This is what I'm thinking but the instructions say different! (?) I'll try again but not today.....
Bryanj:
Set crank th T 1-4 mark and one outside cylinder will have zero clearance and if you rock the crank back and forth over the marks the arms will move up and down you then set the OTHER cylinder, rotate crank one turn and the cylinders will exchange.
Same for T 2-3
DO NOT turn crank with the big nut on points cam
Johnwebley:
I turn the motor over using the kickstarter, not by foot but arm power,
When the inlet is closing I check the exhaust,
When the exhaust is opening I do the inlet,
All on the same cylinder,
It may be time consuming, but seems to work for me
Sent from my SM-A750FN using Tapatalk
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