SOHC.co.uk Forums > CB500/550

low compression woes

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captaindonutbikes:
I was concerned about the torque settings on the head.

doubled up the clymer manual spec after chatting to an old honda mechanic in woodford. seems to be much better going to try starting it her again tonight.

come on!  ;D

pae:
just had a look at the Haynes for the 650, and the M8 bolts should be 17-22lb ft (23-30 Nm) so your original numbers aren't far off that. Does feel pretty weedy when you torque a head to only those levels though, don't it?

The few M6's on the 650 are less than half these values. You hardly seem to turn them past finger tight and the torque wrench clicks.

Phil

captaindonutbikes:
me thinks its a bent valve (s) , but will not give up.  ;D

captaindonutbikes:
lifted the head and found these 4 little offenders.


4 bent exhaust valves, thankfully not run or any damage to the seats.

all parts have been ordered so watch this space!

( i love the learning curve of having your cam 180 out then sorting it then finding the damage)  :D

florence:
Ouch!

At least you know what it is now.

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