Racing Boy has unveiled today in its FB page this UMA Racing Super Head Pro for Yamaha 135LC. One of the interesting claim of this parts is that it will “increase at least 28HP’. The stock horsepower for Yamaha 135LC is 12HP, so this Super Head Pro are giving additional 16HP to the bike! That is a very brave claim from Racing Boy. I kept looking for the valve size but couldn’t find it. I also don’t know whether this is a special valve head or not. Maybe it is pneumatic valve system?
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