installing new accel coils

Has anyone installed new accel coils? I do not know how to do this and make sure the carb jets are compatible.
Greg

installing accell coils will have no bearing on jetting....

I read where they could increase the spark temperature and overheat the head assembly

ACCEL cannot be held responsible for consequential engine
damage caused by the installation of these coils if the consumer
does not address the possible resultant lean fuel condition the
installation of these coils may cause.

www.accel-motorcycle.com/ProductDetails....ion=&minselection=-1

wdizard wrote:

I read where they could increase the spark temperature and overheat the head assembly

No offense intended, but I just can't parse that statement in any way that makes sense.

Spark temperature? That itty bitty spark is going to cause the head to overheat? Run it lean enough it might melt holes in the pistons maybe, and you monitor your plugs for proper mixture anyway, right?

Just call that one the Legal Dept getting carried away with their Disclaimers

I've been using Accel coils for years with no problems, and I've never heard of anyone else having a problem either.

The produced spark only ignites the fuel/air mixture, I don't see how the engine could overheat using these ignition coils.

I guess I can moniter the plugs and if I need to I can enrichen the fuel to air mixture, hopefully without changing the jets, is that hard to learn?
Greg Dizard:)

Reading the sparkplugs is the easiest way to tell how the engine is running.

The color of the center electrode is what you need to see:

BLACK, way too rich, could be clogged air filter.
WHITE, way too lean, can be caused by air/vacuum leaks.
LIGHT TAN, just about correct air/fuel mixture.

Before tweaking the carbs and doing the all familiar jet swap out, check the input voltage to the ignition coils,low input makes for low output. The reading should be close to battery voltage.

Clean all ignition related connectors, as they can have corrosion dropping the input voltage to the coils.

I read the warning in the Accel instructions; they even state "A “hotter” spark normally requires larger jet sizes in order to maximize power output and prevent a possible lean fuel condition that could result in an overheated or possibly damaged engine." I cannot image how a hotter spark can create a lean fuel condition; this sounds like bad science to me. It would be nice if they explained how the temperature of the spark can affect the stoichiometric air/fuel ratio. Maybe someone should send Accel an email and ask how this is even possible? Ed

the stock weak coils will often not cause a complete burn and therfore use less jetting.

Once you add a very strong spark you get a full burn or more of a complete burn and that can turn into a lean condition.

Many times you cn notice on an old Points system whent he points are weak and the spark is weak as well it will act as its rich and the plugs will blacken...because you arent burning all the fuel.

You add more spark and you can utilize more fuel.

I can tell you my kz650 had points and stock coils and I had the stock 104 jets...

after the Dyna ignition kit and Accel 50k volt coils I was very lean...I ended up at 122.5 jets and they are still light tan on the B7ES plugs...throttle is very responsive...

Sounds like I might be changing the jet size, which means choosing a mechanic.
Thanks:)

you can change the jets yourself....

If your hands arent that big you can do it in 30 minutes without even taking the carbs off...

all the times I pulled my jets the carb were still on the bike and when tested at the bike shop still in sync...

I use a 3in Phillips screw gun bit on a tiny ratchet that accepts screw gun bits that i found at advance auto parts...

the hardest part for me is pulling the accelerator pump rod. The screw on the bowls come out easy as long as the bit is fresh and fits the screws snug.

and the screws arent frozen due to being undisturbed in the bike for 30 years.bj