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Cors, I do rebuilds on cranks for single cylinder machine. I'm hoping to make a big announcement soon regarding those KTM cranks that are currently not rebuildable! I do "Stroker Cranks" utilizing aftermarket rods but do not make a "stroker kit" per se. What are you building? The magic 8 ball is thinking it may have something to do with the LC4 family and Turbos. lol
 

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I guess i was studying how to make torque :wink2: . Stroker = easy torque, turbo = easy HP.
. Im not 100% sure as i never really build a KTM motor before but im guessing the LC4 has a stronger bottom end than the RFS .
The 2007 690SM i have atm cant receive a turbo(euro classifications).

this lead me to this line of thinking
Seems like every second 690 duke owner "grows out" of the power to fast. I was google searching .I knew you knew the why and why not. :smile2:

i figured half the guys on a duke390( if they knew more) would be begging for a swap and go.
 
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