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do you think its worth 13 a gallon for u2/u4?

supposovly it adds 1.5hp in a 250f, i just wanted to know your opinions....also does anyone know if c12 is anygood with stock compression... its only 8 a gallon

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Yes! U4 works well in 4stroke motors. It does add horsepower. The only down side is it leaves a good amount of deposits on the piston and intake valves. I have found VP streetblaze 100 works even better with no deposits. C12 will make your bike hard to start and run like crap.

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Yes! U4 works well in 4stroke motors. It does add horsepower. The only down side is it leaves a good amount of deposits on the piston and intake valves. I have found VP streetblaze 100 works even better with no deposits. C12 will make your bike hard to start and run like crap.

I thought that it runs way cleaner than pump, keeping the carbon buildup to a minimum?..

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That is what I was thought but after rebuilding a few 250f heads that was not the case. Switched to the streetblaze and they looked almost new. The streetblaze was the one with ethanol not mtbe.

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