Post 2002 Killer Bee - Anyone have one?

It is possible you do not have a light weight piston, cutting corners further the thread setup on the crank case
wasn't given the attention required to seat the cylinder correctly. The lower larger slit was to allow SPI with the
original version. If the made date on the box is dated past 1996 you have a Killer Bee wanna bee started up again
in late 2001 if I recall correctly. There is a possible upside, word is some folks feel SPI is not as functional as once thought the direction of the exhaust slits in relation to how they face can get turburlated air swirling in causing
disruption in fuel / air mix / burn performance. If facing correctly SPI does indeed provide some extra boost.

I own a original KB .051. Date on box May 1996
I ended up taking a RC .049 TD crank which had a light weight flywheel drilled out pin and put the piston and cylinder
on the TD body and called it a Killer TD awesome performance with a Nelson head.
Here is a vid testing the engine out.


The proper KB had SPI, performance crank, larger slit on the bottom, light weight cylinder with the inside coated with copper looking color perhaps beryllium mix and of course the back plate had its venturi maxed out without the screen.
Lastly the inside of the cylinder was polished and the piston appeared to have a tapper fit at the top and notable
prop thrust plate.