Honda-SOHC

SOHC.co.uk Forums => CB750 => Topic started by: El__burro on July 30, 2018, 12:18:57 PM

Title: No strobe light from cylinder 1.
Post by: El__burro on July 30, 2018, 12:18:57 PM

Good day,
I have been trying to get my k2 running smoothly for a while.. but after checking
Timing,
Carb sync,
Points and gap,
Colortuned
..and using..
new coils, condensers, resistors and spark plugs..
my problem is almost unresolved.
the main dilemma is, when I check the timing with a strobe light gun, i have a good result by using the clamp on plugs 2, 3 and 4. Unfortunately 1 is a no show.
Strangely I have a decent spark on that plug.
Any suggestion to stop me going crazy?

thanks
el__burro

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Title: Re: No strobe light from cylinder 1.
Post by: petermigreen on July 30, 2018, 12:39:11 PM

Try another plug.
I recently had a massive spark on a cylinder and could not get bike to fire. Changed plug and hey presto. Plug was breaking down under compression.


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Title: Re: No strobe light from cylinder 1.
Post by: Green1 on July 30, 2018, 01:22:22 PM

I too have had that on my Pegaso new plug with a nice big spark but it wouldn't run when fitted in the bike.

Title: Re: No strobe light from cylinder 1.
Post by: El__burro on July 30, 2018, 02:40:34 PM

the bike fires up nicely, but after all (swapping plugs included) still no reading from strobe gun.. on plug 1/4.
The timing is set spot on on number 4 (still trying to figure out why..)

thanks
el__burro

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Title: Re: No strobe light from cylinder 1.
Post by: Seabeowner on July 30, 2018, 06:44:48 PM

Only heard this am no expert, but read that if it's an inductive pickup then turning it over on the HT lead sometimes makes a difference.

Title: Re: No strobe light from cylinder 1.
Post by: El__burro on July 31, 2018, 04:05:42 PM

thanks tried that already.


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Title: Re: No strobe light from cylinder 1.
Post by: Bryanj on July 31, 2018, 04:10:56 PM

Never had a lot of luck with inductive strobes, only ever use static timing