SOHC.co.uk Forums > CB350/400

No sparks on my 400... :o(

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470four:
Just took the bike for its first run of the year to the MOT station & back.  :)

Ride out was fine, smiles & giggles - bike was last ridden in November?

On collecting the bike from the MOT place (passed, no prob) I went to start it & - no sparks...plenty of fuel, kill switch on, fuse ok, all dash lights up, kill switch on, all plug leads & connections fine, kill switch on...

Pulled a plug out & no spark to be seen, tried the lead the other side & nothing? Bike has Boyer ignition, managed to avoid any rain etc - only upgrade recently untested was a new ignition switch?

This is where my suspicions lie... the old switch is too nasty to try as a spare - am I right in thinking if the switch is faulty you can have all lights working, starter motor etc - but no ignition system?   ???

Your thoughts please!   

470four:
Have tested the killswitch - works fine, have good feed up to both coils (multimeter) but still no spark?   ???

PatM:
That happened to me on my first run for a while- it was one of the fuses had desintergrated- rather than blown- i.e , the fuse looked perfect and I struggled to find some fag-paper to fix it (as I would have done in the old days) as Id given up. Anyway, something turned upon the road and got me home. I now smoke again..
Seriously, do you have 12 v to the points (with them open)? Thats where I would start.
Let me know and I add some more, step by step.
PatM

Spitfire:
Had a similar one, went out for a ride, stopped at the daughters for a cuppa, went out to start the bike and it would not start, everything looked fine but in the end I found that the connections in the back of the fuse box were the problem, the fuses looked and were fine, it was the corroded wires behind causing the problems.

Cheers

Den

470four:
Cheers peeps!

I picked up a VGC fusebox from the Bath & West, will drop that in in the morning and have a look...

Can somebody refresh my memory as to what all the fuses are please?


I have Boyer ignition - so No Points... & supposedly more reliable?? ;D   Lights all work ok?

There is a 12v feed off the battery + & - to the Boyer cleverbox anyways, so Im thinking there may be a feed to the coils without the ignition system on??

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