Oki guys, I maybe have the solutions for the problem! :
This is my teory:
I think this is a KIPS problem.
Every KX-cylinder I have tuned they all (1989-2004) have a problem with KIPS.
Either with opening or closing or both.
The opening it?s no problem with shims and new parts, but the closing.....
I have found out that KIPS is OVER-closed because of to short stopbolt(92066)
for the rod(49046) who is moving the KIPS.
When the rod moves too far back at low rpm, it?s opening the sub exhaustports
and let some "new" fresh air/fuel in exhaustchamber and it
ignite there,it?s VERY warm exhausts(600*) there.
I have no problem with surges/pulses, I always"take care"
of this KIPS problem.I put in a old steel bearingball and shims(92065) the stopbolt(92066) to right distance.
You have to take away your pipe and SEE (use flashlight) inside exhaustport how much distance you have to adjust.
And one more benifit it`s more lowend power because of right porttimes when the sub exhaustports isn`t engage at wrong time
IF you think I`m right here and you ALL people fix your problems with surges/pulses ,please send a little money($$) to PAUL(admin) so he can afford to
have this site still going!
(you can read about this in old post)
//doordie