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the power valve slot is also sized to work on the 105 kit
When the bolts are reinstalled it is virtually impossible to bend the mounting tabs because the force of the bolts is acting against the tab to keep everything secure and tight
Combined reed tip area increased by 10
Piston Diameter43
SINGLE RING 71
YAMAHA WR/YZ 450F GASGAS EC450F 2003-2015 Wiseco 4 Stroke Forged Series Piston Kit, 95.00 MM Bore, 12.5:1 CR 4785M09500 200EXC the power valve slot isNotice: Product Images may differ from the actual product. Image may be a representation of this item. Made in the USA Fitment: GAS GAS EC 450F 2013 2015 YAMAHA WR 450F 2003 2015 YAMAHA YZ 450F 2003 2009 Bore Diameter 95. 00 Compression Ratio Actual 12. 5: 1 Included Components Ring Set #3741XS, Wrist Pin #S600, CirClip #CW18 Piston Diameter 94. 94 Piston Material 2618 Piston Oversize STD Product Series 4 Stroke Forged Series Product Types Piston Kits
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