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TECHNICAL => ALL MOTOR TALK => Topic started by: dr1ver1 on June 10, 2016, 07:55:47 PM

Title: Stage2 yoshimura cams busa 2008
Post by: dr1ver1 on June 10, 2016, 07:55:47 PM
Hi guys this the first post for me and I need your help
I already fix Yoshimura Stage 2 Performance Camshaft Kit on my Hayabusa 2008
P/N 211-509-0200
Intake : Lift 10.1mm / Duration 258.0 degrees
Exhaust : Lift 9.2mm / Duration 244.0 degrees
Standard Tappet Clearance(mm) : IN 0.13mm / EX 0.23 mm
LC 106 in 108 ex
Now my question I purchase Wesco pistons kit
p/N CK203Displacement: 1340cc
Bore - Standard: 81.00mm
Bore - Actual: 81.00mm
Bore - Oversize: STD
Stroke: 65.00mm
Compression Ratio - Actual: 13.5:1
Now all what I need to know what the best lobe centre for the intake and exhaust should I degree the cams or I leaving 106 108 (I need mid and upper end performance)
Thanks for any advice
Title: Re: Stage2 yoshimura cams busa 2008
Post by: knecum on June 10, 2016, 10:42:41 PM
Just leave them where there at.. check valve lift @ overlap on #1 cylinder
. Intake should have right at .100 @TDC and ex @ .085.   Done!
Title: Re: Stage2 yoshimura cams busa 2008
Post by: dr1ver1 on June 11, 2016, 03:15:00 PM
thank you for your reply, if the clearance is less than in 100 ex 85, what is your advice ;remove a layer from the  pistons  or is there another option?
Title: Re: Stage2 yoshimura cams busa 2008
Post by: knecum on June 15, 2016, 10:24:11 PM
Quote from: dr1ver1 on June 11, 2016, 03:15:00 PM
thank you for your reply, if the clearance is less than in 100 ex 85, what is your advice ;remove a layer from the  pistons  or is there another option?


Leave stock base, that's not clear#s, it's actual lift #s @TDC  overlap,  they should fall right in those lifts ranges installed per directions...if int  has less, advance, if more retard, if ex has more then .085, back engine up, if it has less then, rotate clockwise from right side to achieve the lifts #s I suggested.   Again  these are not piston to valve #s or lobe centers.  If you want L.C. #s. Do the math after setting where I said, you'll be right where your supposed to be per spec sheet.