{"product_id":"tk-01-05-8053","title":"Super Head 4V+R Bore Up Kit 88cc Monkey Gorilla","description":"\u003cp\u003e【SP武川 01-05-8053 Superhead 4V+R Bore Up Kit 88cc Monkey Gorilla Engine Parts Takegawa】\n\u003cbr\u003e■Product Description\n\u003cbr\u003eThis is a kit part that uses the Superhead 4V+R cylinder head.\n\u003cbr\u003eH-cylinder (aluminum iron-sleeved cylinder)\n\u003cbr\u003eAuto decompression camshaft\n\u003cbr\u003e88cc. Bore diameter 52mm. Stroke volume 41.4mm (using normal crankshaft). Compression ratio 12.4:1.\n\u003cbr\u003eIncluded camshaft: 10\/15D\u003c\/p\u003e\n\n\u003cp\u003e■Detailed Description\n\u003cbr\u003e●Features of Superhead 4V+R (1 Cam 4 Valve)\n\u003cbr\u003eCompared to the large-diameter 2-valve SP Takegawa Superhead+R, by using two intake valves and two exhaust valves, the valve curtain area can be further expanded, enabling higher intake and exhaust efficiency than with a large-diameter 2-valve.\n\u003cbr\u003eIn addition, due to the head design that balances the central plug, valve angle, combustion chamber shape, and port shape that accompany the 4-valve conversion, high output is possible, and the sustained output characteristics in the high RPM range, which is the biggest feature of the Superhead, have been achieved.\n\u003cbr\u003eBy adopting a 1-cam 4-valve, it was possible to make it as lightweight and compact as possible, while condensing the performance as the strongest SOHC head.\n\u003cbr\u003e●New Shape Superhead 4 Valve+R Body\n\u003cbr\u003eThe rounded cylinder head shape perfectly matches the Monkey style, enhancing the custom image of the vehicle.\n\u003cbr\u003eIn addition, the die-cast head covers with barrel polishing beautifully accentuate the cylinder head.\n\u003cbr\u003e●Valve Features\n\u003cbr\u003eValve diameter Intake: 21.5mm x 2 \/ Exhaust: 18.5mm x 2\n\u003cbr\u003eValve stem shaft diameter: 4.0mm for both intake and exhaust.\n\u003cbr\u003e●Valve Spring\n\u003cbr\u003ePrevents surging at high RPMs by adopting unequal pitch.\n\u003cbr\u003e●Features of IN\/EX Port\n\u003cbr\u003eThe port diameter is optimized to match SP Takegawa's 3D shaped manifold.\n\u003cbr\u003eIn addition, by simultaneously installing the 3D shaped manifold, a smooth intake effect from the carburetor to the combustion chamber without resistance is possible, maximizing the performance of the cylinder head.\n\u003cbr\u003e●M8 Spark Plug\n\u003cbr\u003eAn M8 spark plug is adopted due to the optimal valve angle achieved by the 4-valve conversion and the compact head.\n\u003cbr\u003e●Adoption of Roller Rocker Arm\n\u003cbr\u003eBy adopting roller rocker arms, the output performance of the Superhead+R is maximized, increasing output in the mid-to-high speed range and maintaining output in the high RPM range, which is a feature of roller rocker arms.\n\u003cbr\u003eThe roller rocker arm reduces the friction resistance with the camshaft that occurs with slipper-type rocker arms (genuine part type).\n\u003cbr\u003eWith the roller bearing built into the rocker arm, it smoothly follows the cam profile from low to high RPMs.\n\u003cbr\u003e●Hollow Camshaft (Auto Decompression Mechanism)\n\u003cbr\u003eThe camshaft is supported by ball bearings at both ends, reducing friction resistance in the camshaft journal area.\n\u003cbr\u003eIn addition to the included camshaft, optional camshafts are available, so you can change them according to your intended use and enjoy the riding performance.\n\u003cbr\u003eIncluded camshaft: 10\/15D\n\u003cbr\u003e●Auto Decompression Mechanism\n\u003cbr\u003eIt reduces the kick start force and the load on the transmission when starting the engine, allowing for smooth engine starting even with large displacements.\n\u003cbr\u003e●Cylinder\/Piston\n\u003cbr\u003eH-cylinder Bore diameter 52mm\n\u003cbr\u003eAdopts aluminum iron-sleeved cylinder.\n\u003cbr\u003eThe cylinder comes standard with a temperature sensor mounting part.\n\u003cbr\u003eYou can measure the cylinder temperature by purchasing an SP Takegawa thermometer built-in meter or a thermometer.\n\u003cbr\u003eFor 88cc H-cylinder: M5 temperature sensor\n\u003cbr\u003e●Piston\n\u003cbr\u003eAdopts cast piston.\u003c\/p\u003e\n\n\u003cp\u003e■Compatible Models\n\u003cbr\u003eHONDA\n\u003cbr\u003e12V Monkey\/Gorilla (Z50J-2000001~\/AB27-1000001~1899999)\n\u003cbr\u003eCRF50F (AE03-1400001~)\n\u003cbr\u003eXR50R (AE03-1000001~)\n\u003cbr\u003eCRF70F (DE02-1700001~)\n\u003cbr\u003eXR70R (DE02-1300001~)\u003c\/p\u003e\n\n\u003cp\u003e■Notes\n\u003cbr\u003e※Image is for illustration purposes only. Includes products with different sizes and colors.\n\u003cbr\u003e※Product design and specifications are subject to change without notice. Please be aware.\n\u003cbr\u003e※Optional camshafts 25\/30D cannot be installed on 88cc.\n\u003cbr\u003e※This product is made-to-order, so cancellations after ordering are not possible.\n\u003cbr\u003e※As this is a made-to-order product, delivery may take some time. Also, please note that the manufacturer may discontinue the product or change specifications without prior notice. Thank you for your understanding.\u003c\/p\u003e","brand":"スペシャルパーツ武川(SPECIAL PARTS TAKEGAWA)","offers":[{"title":"Default Title","offer_id":47208274821355,"sku":"tk-01-05-8053","price":153352.0,"currency_code":"JPY","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1021\/9499\/files\/tk-01-05-8053.jpg?v=1766738585","url":"https:\/\/bikeman.jp\/en\/products\/tk-01-05-8053","provider":"バイクマン","version":"1.0","type":"link"}