Author Topic: 01-500, eng surges/pulses after run. (Read 11906 times)

mun · « **Reply #30 on:** February 08, 2005, 04:41:27 AM »

Some finnish "electric man" told me once that KX500 fires two times every stroke!
I have MyChron Light MCR (http://www.aim-sportline.com/KART/light.htm#MCR) on my old -86 KX and it can be configurate "rmpratio". This rpmratio is on my bike 2 = two fires / stroke! I checked this just in garage.

I have always setting my crossbike no idle. I can't ride with idle, horrible.
No problem when shut off throttle, with stock Mikuni VM40 and now VM44. Over 20 years ago 2-3cm of cylinder basegasket blow off my -82 CR480 and it run then 2000-3000rpm "idle".

sorry again my awful english

doordie · « **Reply #31 on:** February 08, 2005, 05:52:25 AM »

mun,

No problem with your english,we understand the most BUT don?t spell
in Finnish plz!

(I spell as crap too)

You have a lot of experience you can share,I promise.

But the teory,I can be right here?

If it fire twice/stroke it will explain a lot.
Maybe a BIG fire and then a smal clean-up fire 20 degrees or something later?

Kxcam22 is testing too,see what he comes up with.

//doordie

John · « **Reply #32 on:** February 11, 2005, 01:52:05 AM »

Doordie,

Thanks for chiming in! Seems like you could be on to something - two things actually. The second spark would be controlled by the CDI rather than the rotor and stator..? If this is the case, it might / could be verified by someone with a different CDI like aftermarket stuff? It seems like the 250 has a feature called "twin spark" which is provided by the CDI (could this be the same?). Google it to see some info.

Mun,

Don't worry about the language, everyone understands what you mean - Ykkeskanava.

//John

doordie · « **Reply #33 on:** February 11, 2005, 04:15:29 AM »

John,

Yes,it?s controlled by CDI if this is true.Maybe enough of power to get
a little spark after the main spark some degrees later.

Did article told what year of KX250 this twinspark CDI were on?

Hope KXcam22 or someone could with right "stuff" solve it.

//doordie

John · « **Reply #34 on:** February 11, 2005, 06:34:40 AM »

Doordie,

It seems they existed on the 2000 models at least. It might be that it's the same stuff all over but they started to market this a feature Y2K? I really don't know...

//John

gowen · « **Reply #35 on:** February 11, 2005, 07:16:15 PM »

I have a PVL system on my KX500, which is a inner rotating flywheel, totally diffrent stator, all new CDI, Coil, ect. ect. Totally diffrent ignition...

EDIT: Oh yeah, same issue.