I'm putting my '11 ZX-10R engine back together after getting the head decked (0.012"), a valve job, as well as a 0.50mm kit head gasket. I decided to measure the cam timing with the stock sprocket holes first to see if I was close enough to not have to bother with the elongated holes. Stock cams BTW.
Here is what I have: 113.5/103.75
Kawasaki recommended numbers: 112/104
Piston to valve clearance is fine.
Think that's ok to go with? At this point, taking the sprockets off to put them on the elongated holes is a PITA, and then I can't fit a wrench in there to adjust them with the engine in the bike, so I'd either had to pull the cams each time to adjust or drop the motor.
So, the question is, live with 113.5/103.75 instead of 112/104, or spend hours adjusting to 112/104 exactly? The exhaust cam is obviously close enough, but the intake is 1.5 degrees off...and I don't know enough about cam timing to know if that will have a profound negative effect on power or not.
Thoughts? What is the effect on the power curve with the intake cam timed 1.5 degree higher?
WERA Expert #43
2012 WERA National Challenge Series Open Superstock Novice Champion
COMET RACING LEATHERS
2011 ZX-10R Race bike (Vortex, Silkolene, Leatt, Yoshimura, BRIDGESTONE)
2013 ZX-6R 636 Race bike
2008 Ducati Hypermotard 1100s