SOHC.co.uk Forums > CB750

Help/ ideas please

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RGP750:
I'll give that a go as well thanks.
The coils were new from US ,the brass terminal screws in the cap broke on 2 of the caps
when i screwed them on the Ht leads ,think i'll scrap the caps and get NGK >:(
Checked valve clearance and all spot on.
Compression test when it gets here.
Cheers Rich

JamesH:
I always insist on NGK caps and plugs from an official NGK distributor - and always check impedance of the caps before fitting. There's a lot of fake NGK parts in circulation...

RGP750:
Cheers James , how do i check if the new ones are impotent?? :D :D
Seriously how do i check?

JamesH:
Get a multimeter, set it to the 20 kOhm setting and meter across the ht caps individually (removed from the HT lead). Should read 5 kOhms.

Then meter the ht leads for each pair of coils with the caps removed (stick the probe into the end of the ht leads ). So you'll be measuring 1&4 as a pair and 2&3 as a pair. Should read 15 kOhms.

Ring me if you get stuck or want to talk it through.

J

RGP750:
Thanks James.
Mick is lending me some caps tonight until my new ones turn up.
Rich

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