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Post 2002 Killer Bee - Anyone have one?

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Post 2002 Killer Bee - Anyone have one?

Post  Admin on Fri Nov 27, 2015 5:01 am

Anyone here actually have a factory Estes-Cox Killer Bee that features a Non-SPI slit cylinder? I was looking over my cylinder list earlier and questioned the Post '02 Killer Bee cylinder.

Going back to what I've seen over the years, even on the old Cox website, I don't recall seeing a credible example of a factory assembled Killer Bee featuring the non-SPI cylinder. Knowing the QC that Estes had, I suppose it is possible but nowhere does it appear to be any kind of design change.



This is the stock image of the Killer Bee saved from the Cox website in 2006.

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Re: Post 2002 Killer Bee - Anyone have one?

Post  1/2A Nut on Fri Nov 27, 2015 6:43 am

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.



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Last edited by 1/2A Nut on Sun Nov 29, 2015 11:40 pm; edited 1 time in total
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Re: Post 2002 Killer Bee - Anyone have one?

Post  Admin on Fri Nov 27, 2015 6:42 pm

I'm just wondering if anyone has actually seen later Killer Bees with non-SPI slit cylinders (same as used on the Sure Start)?

Otherwise, since I can't find any credible info on 2002 Killer Bee cylinders, I'm going to remove it from the cylinder list. It appears they never did make a production change.

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Re: Post 2002 Killer Bee - Anyone have one?

Post  1/2A Nut on Sun Nov 29, 2015 11:45 pm

Yes sadly at some point I imagine things where put together to run out the stock parts. I don't blame them for trying to recoup the investment. It just a matter of keeping the Cox brand up and running back then. I have never read any input of it being done for for direct performance reasons. Small Cox Logo
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