spark top speed

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About 52-53mph with just the tune. Get an impeller and it's closer to high 50s. We just got more vtechs in stock today as a matter of fact.
 
The stock speed is about 52-54 from what I've read so it doesn't increase top speed? Or did I get misinformation from reviews? Thanks
 
The stock speed is about 52-54 from what I've read so it doesn't increase top speed? Or did I get misinformation from reviews? Thanks
It marginally increases top speed, but really an impeller and intake grate are needed to take full advantage of the increased RPMs from the tune. There is a significant boost of power in the lower end, however.

what HP can the tuner take this engine to? Anyone have it on a dyno yet?
Yeah, V-Tech has a dyno and it tested at 109hp
 
You'll also need access to the $389 hand held tuner in order to install the $550 tune. And yes, this will work on the 60hp equally as the 90hp.
 
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