RKT "drop in pistons" and head on '09xp

[chickenman]

Just looking to see if anyone had done the drop in piston kit on an XP and how you liked it?
Do you notice any power gain or is it a wash. Looking at a rebuild....

thanks

 

[robhayward]

I did exactly that last Feb on my niner. It's a wash, no gain or loss but no more heat soak on back to back pulls.

Another thing I noticed was that it was suuuper tight after install. Wouldn't rev up quickly and seemed sluggish and under powered.

13.5-1 head around Calgary with Av and it took 30-40km to gain rpms quickly. It was normal on the first trip to the hills though.

 

[chickenman]

Did you do the recurve too?

 

[robhayward]

Did you do the recurve too?

Nope.