metal shavings in block

[g-force performance]

Have you run any stick-coils on any of your systems? I'm interested in your points.

I run stick coils on my NC24 (which doesnt used a wasted spark design as it has 4 coils not two becuase of the 180 firing order), it also has 10mm plugs as standard and makes the same power as most standard NC30s do... I think the 8mm plugs were a bit over-kill on the 59ps NC30 engine. But anyhow

I also run stick coils on my ZXR400 which does use a wasted spark, so the coils are wired in series.

ive covered about 6000 miles on each bike since having the stick coils in (it was done on the ZXR as i needed space in there for new airbox and I did the VFR as I just had some spare

I havnt had any running problems or signs of over-heating (yet) although your concerns are potential pit-falls, whcih im curious to find out if you actually had these manifest or were just erring on a side of caution.

I havnt noticed any performance increase or decrease, but in the case of the zxr it did give me a lot more room in the engine bay (which was the idea)

So I wouldnt really recommend it as being an essential mod either, unless your craving space

Also, wouldnt running them in series divide the voltage?

I haven't run the stick coils on any NCs yet. We have them fitted ot the Fuel Injected buike, but it hasn't run yet.

My experience eith the stick-coils come from racing with them in ZX-6R, ZX-7R, ZX-9R, R-6 and CBR600s. I have seen the coils overheat and break (they ooze this slimy paste out the center). I have seen them fail. I have seen them just not provide enough spark for thye higher output of a modified engine. So....I saty leary. I am sure they work on a street bike OK. Just not sure if they are an "improvement" worth the cost or effort if you're looking for a performance advantage. Just as you say.

Mike Norman
G-Force Engine Development
http://www.mngforce.com

[Neosophist]

Yep, i'm with you on the performance.

In the case of the ZXR they gave a lot more room in the engine bay which was needed as I was persuing a ram-air box system which was on the large side.

Havn't had them melt yet but the bike hasn't been tracked this year yet, will keep an eye on them though :)