You say
"It's slower than 90% of high performance 4/s"
And how many of these "high performance 4/s" are actually used in british karting?! Honda's and Aixro's? Thats two others, and I make that only 33% of karting 4/s faster than TKM 4's.
"It doesn't have an onboard starter"
As far as I'm concerned, thats just another thing to go wrong. Lets face it, an offboard button starter is still better than running alongside it and dropping it on the floor, hoping it'll start. And, even better than a pullcord!
"It doesn't last any long?"
I presume you meant, longer. Lasts longer than Rotax's with no drop off in power. How much longer do you need?!
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