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Old 04-07-2013, 06:42 PM   #2
81cr450 OP
Gnarly Adventurer
Joined: Jul 2011
Location: Piute ATV trails Utah , Dreaming of Baja
Oddometer: 100
On the piston I windowed it & dropped the boysen port before the replate. On a kx500 it equals 2.5 hp in the mid range. The reason I think it works like that is if you think of swinging a bucket to keep the water in the bottom the highest point of pressure is in the very bottom so a window relieves this hgih pressure point.

The piston is also skirt coated with an antifriction coating & ceramic on top
Here's the boysen port drop

81cr450 screwed with this post 04-07-2013 at 06:52 PM
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