*Because the head is larger than stock, the cooling effect is better than stock, but some air shrouds need to be cut. *The combustion chamber is not like a stock YAMAHA head, but a KN Planning racing head with no steps.
Big size racing head for 50mm bore. Stock displacement (82cc) type.
Combustion Chamber: Racing shape
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
I was a little worried about the processing of Shroud because the head is large, but the power goes up! Shroud processing cuts the downwind side of the HeadRight Side to the smallest limit necessary The direction of the wind in Shroud has been kept the sameView Detail
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