63mm Big Bore + High Cam + Big Valve Head! Full Set Engine Kit, For Long Crankshaft Only, Cygnus X

【KN Planning KN-CY63F-LC-SET 63mm Big Bore + High Cam + Big Valve Head! Full Set Engine Kit for Long Crank Only - Cygnus X】
・KN Planning 63mm Big Bore + High Cam + Big Valve Head! Full Set Engine Kit 【Cygnus X / BW'S】
For long crank only
【Features】

・Finally here! No more hesitation! A complete engine kit!
・Full kit with big valves optimal for a 63Φ bore diameter + high cam head.
・This kit is specifically designed for 3mm long stroke cranks.
・Please combine with a 60.9mm stroke crank.
・For Cygnus X 1st-3rd gen, click here. For Cygnus X 4th-5th gen / BW'S125 1st-2nd gen, click here.
・Includes dedicated roller rocker arms! Maximum friction reduction!!
・A thoughtful kit that includes tappet adjusting bolts & nuts and even rocker arm shafts!
・Ports are significantly larger than genuine ones.
・Designed to extract power without additional machining.
・Camshaft profile is also optimized for the kit.
・Employs a forged piston for improved durability.
・Top shape is high-compression type.
・Crankcase boring is required.
【Type】
For long crank only
【Size】

~Cylinder~
・Bore diameter: 63Φ
・Aluminum plated sleeve cylinder
・Displacement: 189.72cc (with 3mm long stroke)
~Piston~
・Forged aluminum piston
・High compression type
~Cylinder Head~
・Valve size: IN24mm / EX21mm
・Combustion chamber volume: 17cc
・BIG Port
・Reinforced valve springs (Silicon chromium alloy SWOSC-V)
~Camshaft~
・Duration: IN240° / EX240° (at 1mm lift)
・Lift amount: IN6.28mm / EX6.28mm
・Dedicated roller rocker arms included
【Compatibility】

・Cygnus X 1st gen Japanese spec【5UA】
, Taiwanese spec【5TY】

・Cygnus X 2nd gen Japanese spec【28S】
, Taiwanese spec【4C6・1CJ】

・Cygnus X 3rd gen Japanese spec【1YP】
, Taiwanese spec【1MS】

・Cygnus X 4th gen Japanese spec【BF9】
, Taiwanese spec【2UB】

・Cygnus X 5th gen Japanese spec【B8S】
, Taiwanese spec【B2J】

・BW'S125 1st gen Taiwanese spec【5S9】

・BW'S X 1st gen Taiwanese spec【46P】

・BW'S 125 2nd gen Japanese spec【BG1】

・BW'S R 2nd gen Taiwanese spec【2JS】

【Set Contents/Accessories】

・Dedicated cylinder head (IN & EX valves, springs pre-assembled) ×1
・Dedicated camshaft ×1
・Dedicated rocker arms IN & EX (tappet adjust nut & bolt, rocker arm shaft included) ×1 set
・Dedicated cylinder ×1
・Dedicated forged piston kit (rings, pin, clips included) ×1 set
・Dedicated head & base & tensioner gasket ×1
・Instruction manual
【Precautions】

*The head temperature sensor hole is M10×1.25 specification. If not used, the hole must be sealed with a bolt, etc.
*This product is a high-end tuning part. Please ensure assembly is performed by an experienced mechanic.
*In cases where the chain guide interferes due to individual differences, please address with machining or other methods.
*The genuine fixing bolt for the rocker arm pin plate is long and may interfere with the rocker arm.
*Please use a washer with the bolt to avoid interference.
*This product is a kit exclusively for long stroke cranks (60.9mm). It cannot be combined with a genuine crank.
*Crankcase boring is required for this product.
*Images are for illustration purposes only, and the design and specifications of the products listed may change without notice. Please be aware.