Throttle body type injection systems have been used on sleds for years and there have been a few adapted to the atv market. They work well in that once you get them dialed in you don't have to mess with jetting/tuning so much, but a good carb tuner can get the same kind of performance. Now, there has been much work as of late with DI and that presents a whole new performance advantage being able to inject the fuel at just the perfect time to optimize the combustion process. Very interesting stuff for sure.
On a note: my earlier posts are very generalized from what I have found in my own work. What works well for one may not be the power ticket for an other. And I want to re-emphasize that to bore vs. stroke is largely dependant on the parameters of each individual engine.
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