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trail bikes 165 head

616 Views 10 Replies 9 Participants Last post by  KI6HNB
Just wondering im thinking of buying the 165 kit for my klx just wondering whats the difference between the race head and the v2 head. or does anyone know the horsepower with either as a bolt on
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rpklx said:
Just wondering im thinking of buying the 165 kit for my klx just wondering whats the difference between the race head and the v2 head. or does anyone know the horsepower with either as a bolt on


Bigger valves, roller rockers......
ports and combustion chamber are different too.
rpklx said:
Just wondering im thinking of buying the 165 kit for my klx just wondering whats the difference between the race head and the v2 head. or does anyone know the horsepower with either as a bolt on




the V2 head it a full roller rocker head,



the Race head aka the V1 is just a bigger valve and port KLX head,



the V2 with the right carb on a 165 can get you 16+hp



the V1 is more like 12-13 hp
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With the 165 kit and a v2 head look in to a de-comp cam.
Paxracing said:
With the 165 kit and a v2 head look in to a de-comp cam.






You still want me to do a few Stock Mod KLX heads?
Definatley go with the v2 head. I have ridden both the racehead and the v2 head and the v2 has alot more power.
paxracing said:
with the 165 kit and a v2 head look in to a de-comp cam.


any s35 yet
im gonna get the 143 kit from tb i just play on my bike but i am 240lbs is there anything i NEED to swap out or is that kit good for me?
What year is the bike? If it's not an '08 then you will need a HD out put shaft. Also while your in there you might as well do the stroker crank and the 4spd drum/shift star.
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