SOHC.co.uk Forums > CB750

Relationship between Timing & tappets

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Yoshi823:
I wonder if the enhanced output from the ignition is causing any voltage to escape from the plug caps? The noise description might be voltage jumping to earth/chassis.

Sprunghub:
The coils come with Dyna leads & caps.  You have to cut down & make up the connections at the coils, add screw on grommets to the plugs....just the sort normally fitted to 'plugs', & then the Dyna caps lock onto the larger connector.  I can't see any 'jumping' but I suppose if it was in the recess, I wouldn't.
Took her for a half decent run today - about 50 miles, it get's no better, it get's no worse, the performance of the bike doesn't seem to be affected........but I don't think it's "right".

Could still be that exhaust.......but instinct suggests it's not necessarily.

Frustrating............... more so, because I simply can't isolate where the noise is coming from.   

Spitfire:
Start it up in the dark and look under the tank for arcing.

Cheers

Den

Sprunghub:
Good plan.... ;)

Sprunghub:

--- Quote from: Bryanj on April 07, 2010, 02:37:04 PM --- blowing at the head as that can sound very much like a tappet

--- End quote ---

Another bouquet to BryanJ  :D :D :D

removed the Motad, refitted the OEM with my newly acquired 'proper' collets & rear bracket, tweaked it all up & she's all purrs again ;D
No tick's, tocks, wooshes or other odd noises, just vroom, vroooom, vrooooom. ;D

Now then, where's that sun gone ?

8pm
Just been out for a run - first time on the OEM system......she is absolutely flying - seems to have freed up enormously after the Motad, which I presumed would have been a straight "fit" ?  
Either way up, what a  ;D ;D ;D ;D ;D 8)
Must get a new piccie ;)

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