Timing is way off?

eyhonda · Post by **eyhonda** » Tue Nov 10, 2009 9:14 pm

Checking the timing, I find it way off. The right side fires at the left side advance marks (the marks just to the right of the 'T F' marks). The left side, of course, fires at the right side advance marks. The rotor is marked "cb72", which seems wrong. The cam seems to be tight (no slop) and the advance seems ok if I twist it to clockwise. Any ideas?

e3steve · Post by **e3steve** » Wed Nov 11, 2009 1:57 am

Did you follow the EMO recipe in FAQ? http://www.honda305.com/superhawk/

eyhonda · Post by **eyhonda** » Wed Nov 11, 2009 6:47 am

No but I should of. I was off 180 plus advance. Thanks!

e3steve · Post by **e3steve** » Wed Nov 11, 2009 6:57 am

Stuff happens, mate!

Years ago, a pal had a BSA Bantam 150 (D3, I seem to recall). He static timed it 'from memory' and kicked it in the guts; it kicked back, started with an almighty SCHFUTT from the carb and then ran, in a sort of fashion. He donked it into gear, revved it to clear the 4-stroking a bit and let the clutch go.

It promptly shot backwards through the garden hedge! The timing was so far out that the motor was running bac....-- you're way ahead of me here!

The trials and tribulations of a 15-year-old......

eyhonda · Post by **eyhonda** » Wed Nov 11, 2009 7:25 am

Funny stuff! I always had a curiousity if a motor could run backwards. Now I know!

One thing I found adjusting the timing was that the points gap is not the same, right to left. The timing and gap is related but almost never both correct. Correct timing will give some error in the gap right to left difference. I would guess that if I set the right gap, then the left gap, that there would be an error in the right and left timing. With the correct method, the timing is priority and any error in the left gap is probably tolerable. I'd bet that the left plug would be always a little off in the rich or lean condition. I think if this was true, then maybe the left plug gap could then be adjusted to twice the left points gap. If the plug gap range is .024-.028, then the points gap range should be .012-.014.

e3steve · Post by **e3steve** » Thu Nov 12, 2009 4:50 am

Interesting stuff; I'd never given re-gapping the plug much thought.

Off-topic continuation: http://www.honda305.com/forums/viewtopi ... 3803#23803