RK Tek head
It has been said before, but I will echo it here - the RK Tek head mod is impressive.
You can ride a gear higher, runs cleaner/smoother throughout the range, more top-end/revs higher, jetting was perfected, I am very happy with this modification!
Gasgas didn't know how good of a motor they built!
Jeff
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'18 GG XC 300
'05 GG DE 300
'01 GG txt 321
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