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Dirt Bike Brands - Other
selecting the proper valve shim
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[QUOTE="Papakeith, post: 1254994, member: 19688"] This is for my 04 CFR450 It had been some time since I had checked the valve clearance on my bike. It was hard starting it on the last ride so I figured I'd better get to it. Well, sure enough, the intake valves were out of spec. Would you guys check my math and help me make sure I'm doing my calculations correctly so that I get the right replacement shims? Specified valve clearance: Intake .006 +_.001 .16mm Exhaust .011 +- .001 .28mm The exhaust valves were in spec so I'll get right to the intake valves. Here are the numbers I came up with Left Intake <.002 or somewhere between .0254mm and zero. I don't have any feeler gauges thinner than .002 current shim size is 1.65 Right Intake .003 current shim size 1.75 .0762mm Doing the math: A= (B-C) + D Where A = new shim thickness B= recorded valve clearance C= Specified valve clearance D= Old shim thickness Left Intake A=(0.0254-.16)+1.65 A=1.5154 So, do I go with 1.50? Right intake A=(.0762-.16)+1.75 A= 1.666 and this one would be 1.675? or 1.65? Available shims: 1.200mm – 3.000mm in .025mm intervals [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
selecting the proper valve shim
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