SOHC.co.uk Forums > CB350/400
400/4 ignition timing
colin400four:
Good Evening to you all,
I'm about to change the points and condensers, then re do the ignition timing. any points to watch out for, and any tips on the ignition timing, Only ever done this on twins and used the fag paper method to great success but a 4 seems more "complicated".
I've read on this forum that the most "popular" method to use when timing these old fours is the static method, could anyone talk this process through for me ???.
Best Regards
PatM:
I havent done it in this incarnation, ie for about 20 years- but multimeter or light and stobe light to check each set. The marks on the plate are the starting poinbt and make sure all the insulators are in place on the points otherwise you will earth the live lead and get no sparks at the plugs! Probaly bets to change one set at a time- start the bike, on one new set/one old set- then you know it works. I it doesnt, play with the one new one till you get it right. Photos help! Good luck. (I take it you have a Haynes manual?)
colin400four:
Hi PatM, many thanks for your kind words.
Colin.
Spitfire:
Have a look here for all sorts of info.
http://users.fulladsl.be/spb2854/docs.htm
Cheers
Den
florence:
I have an old indicator with no lens which has long wires with crocodile clips. One wire goes onto the points, the other onto an earth on the frame, an exhaust stud is ideal. Set the points gap to the recommended amount. Next, turn the crankshaft using a spanner. The points should begin to open at the exact point that the 'F' mark lines up on the timing marks (as described in the manual). It's pretty easy once you get used to it. You will need to repeat this process for each set.
If you cannot get a bulb and wire together you can put a small transistor radio tuned off-station near the engine. When the points open you will hear a click coming from the radio. Sounds mad but it works. (NB this will not work with digital radios)
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