Boxerworks.com

Right then.
Electronic ignition bikes.

The 'black box' under the tank, the one that has the heat sink paste.

Why is there a difference with the black box between a bike with kick start, and one without

Does it have to do with altering ignition timing at the slow kick start rpm?

I don't know what model you are referring to, but you may be on the right track. First I think that it would be to accommodate being started either way. When you turn the ignition on the bike doesn't know which way it will be started,so I would say the default would be kick start. When you hit the button to engage the starter, more current goes to starter motor, so I would expect a different circuit tapped off the starter circuit is used to amplify power to coils.

Ah yes, which model.

81-84.

Quite possibly on the monos as well, if they had a kick start.

ME 109 wrote:Ah yes, which model.
81-84.
Quite possibly on the monos as well, if they had a kick start.

Kick start On my Monolever
If it don't start, I give it a good swift kick.

dougie wrote:

ME 109 wrote:Ah yes, which model.
81-84.
Quite possibly on the monos as well, if they had a kick start.

Kick start On my Monolever
If it don't start, I give it a good swift kick.

That would be kicked start Doug.

In the event of the ignition being left on without starting the electronic black box has a time delay cut out to prevent overheating. Is the delay longer on the kick start version to give the rider time to get his act together ?

barryh wrote: Is the delay longer on the kick start version to give the rider time to get his act together ?

From what I've seen of kick start demonstrations, I'd say your spot on Barry!

They are indeed different...found out the hard way when substituted non-kicker module on my kicker 81 R100. Think Barry is right abut the delay to coil cutoff. While I could use it for electric start could never kick her over...mind you I never kick her too often and was difficult even with the correct module.

Think Snowbum had something on reason for the difference or maybe Oak...

Why do you ask Jeff....contemplating a "kicker" upgrade to the RS box?

moosehead wrote:Think Snowbum had something on reason for the difference

Snowbum, in all his verboseness:

"The Ignition Modules (under the tank modules) were initially made in two versions. On these early modules, a spark could occur when the key was first turned on. One version was for the kickstart bikes, one version was for the no-kickstart bikes. The original modules had a timing feature that cut off the current flow AFTER about 5 seconds for the kickstarter equipped bikes, and about 1 second or so for the NO kickstarter equipped bikes. Later this was changed to about 1.5 seconds (UNclear to me, but perhaps this 1.5 was for both...or for the kickstarter equipped bikes...not sure). The kickstart modules timings were originally longer to allow time to kickstart the bike. Which is a bit strange, since engine rotation causes the modules to be triggered anyway. The reasoning behind the shorter cutoff for later models is to lower heating of the coils, which supposedly was THE, or only one of the, causes for the original twin-tower gray coil to fail by cracking. Apparently, some folks would turn on the key, and continue a conversation, without starting the motor. Perhaps some very early modules never had a timer at all. The coil redesign for reliability (no more cracking) did not result in any change in the electrical characteristics of the coil."

I even threw in the coloring just so you could get the "full" effect!

Kurt in S.A.