Won't you have an issue with the larger gap with high cylinder pressures? Under higher loads it is harder to have a spark with the bigger gap. Thoughts?
I tested bigger gaps just to see the color of the spark and if it could do it.
The stock coils couldn't handle a bigger gap very well at all.
The Dyna coils were jumping an inch gap on my tester, but that wouldn't work for the 599. lol
I always keep my spark blue, when it is yellow then the gap is too big.
Well at least that is the way I have always done it.
Currently I am running with a gap at 0.040 inch which is only 0.006 inch bigger than stock.
I would really like to try a 0.045 inch gap, but I don't see going any further than that in this engine (just guessing).
The higher output coil can handle this with no problem and still gives a blue spark.
I am pushing 35,000 volts instead of the stock 20,000 volts, so I see no issue.
So far the bike runs great at all loads and rpms.
It's the higher rpms were I will probably see any issues when pushing the limits.
I plan on doing some more testing with a few other spark changes, timing, and such.
Another great thing about a blue spark and larger gap, is I should be able to up the jetting and get more power.
A strong spark always does well with a little richer mixture and give a noticeable power increase.
I don't know why, but that has been my experience anyways.
When I tinkered with my 425 big block (11.5 compression), I played with getting the biggest blue spark I could, then I was able to jump the jet sizes up two more in the carb.
The 599 is a whole different engine scenario, but I will play around and see what I like.
I am very interested in trying a set of the multi-spark BRISK spark plugs in the bike.
They gave a great spark with longer duration, so they may prove to work great, but then again maybe not.
Further goofing around will help me decide.
After some more testing, I may play with the jetting.
I will share my results as I get further along in my tinkering.
Also, for some reason my bike is running richer at start-up, so it really starts better with the slight gap increase.
Above all remember that I was just tinkering around and am not making any suggestions, just sharing my results and opinions.