{"product_id":"tk-01-05-8052","title":"Super Head 4V+R Bore Up Kit 88cc Monkey Gorilla","description":"\u003cp\u003eSP武川 01-05-8052 Superhead 4V+R Bore Up Kit 88cc Monkey Gorilla Engine Parts Takegawa\n\u003cbr\u003e■Product Description\n\u003cbr\u003eThis kit uses a Superhead 4V+R cylinder head.\n\u003cbr\u003eH-cylinder (aluminum iron sleeve cylinder)\n\u003cbr\u003eDecompression camshaft\n\u003cbr\u003e88cc. Bore diameter 52mm. Stroke 41.4mm (using stock crankshaft). Compression ratio 12.4:1.\n\u003cbr\u003eIncluded camshaft: 10\/15\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 SP Takegawa's Superhead+R large-diameter 2-valve, by having two intake valves and two exhaust valves, the valve curtain area can be further expanded, enabling higher intake and exhaust efficiency than large-diameter 2-valves.\n\u003cbr\u003eIn addition, with the conversion to 4 valves, the head is designed to balance the center plug, valve included angle, combustion chamber shape, and port shape, enabling higher output and achieving the sustained output characteristics at high RPMs that are the greatest feature of the Superhead.\n\u003cbr\u003eBy adopting a 1-cam 4-valve design, it was possible to achieve the lightest and most compact design possible, while condensing the performance as the strongest SOHC head.\n\u003cbr\u003e●New Superhead 4V+R Body\n\u003cbr\u003eThe rounded cylinder head shape fits well with the Monkey style, enhancing the custom image of the vehicle.\n\u003cbr\u003eIn addition, the die-cast head covers, which have been barrel polished, beautifully accent 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: Both intake and exhaust are 4.0mm.\n\u003cbr\u003e●Valve Springs\n\u003cbr\u003eUneven pitch prevents surging at high RPMs.\n\u003cbr\u003e●IN\/EX Port Features\n\u003cbr\u003eThe port diameter is optimized to match SP Takegawa's 3D manifold.\n\u003cbr\u003eBy using it with a 3D manifold, it enables smooth intake from the carburetor to the combustion chamber without resistance, maximizing the performance of the cylinder head.\n\u003cbr\u003e●M8 Spark Plugs\n\u003cbr\u003eM8 spark plugs are used due to the optimal valve included angle from the 4-valve conversion and the compact head.\n\u003cbr\u003e●Adoption of Roller Rocker Arms\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\u003eRoller rocker arms reduce frictional resistance with the camshaft that occurs with slipper-type rocker arms (genuine part type).\n\u003cbr\u003eWith roller bearings built into the rocker arms, they smoothly follow the cam profile from low to high RPMs.\n\u003cbr\u003e●Hollow Camshaft\n\u003cbr\u003eThe camshaft uses ball bearing support at both ends to reduce frictional resistance in the camshaft journal area.\n\u003cbr\u003eOptional camshafts are available in addition to the included camshaft, allowing you to replace them according to your intended use and enjoy the riding performance.\n\u003cbr\u003eIncluded camshaft: 10\/15\n\u003cbr\u003e●Cylinder\/Piston\n\u003cbr\u003eH cylinder Bore diameter 52mm\n\u003cbr\u003eUses an aluminum iron sleeve 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-equipped meter or thermometer.\n\u003cbr\u003eFor 88cc H cylinder: M5 temperature sensor\n\u003cbr\u003e●Piston\n\u003cbr\u003eUses a 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. Includes products with different sizes and colors.\n\u003cbr\u003e*Product design and specifications may change without prior notice. Please understand.\n\u003cbr\u003e*Optional camshaft 25\/30D cannot be installed on the 88cc.\n\u003cbr\u003e*This product is made-to-order, so cancellations after ordering are not possible.\n\u003cbr\u003e*Due to being made-to-order, delivery of this product will take 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":47208274788587,"sku":"tk-01-05-8052","price":148500.0,"currency_code":"JPY","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1021\/9499\/files\/tk-01-05-8052.jpg?v=1766738577","url":"https:\/\/bikeman.jp\/en\/products\/tk-01-05-8052","provider":"バイクマン","version":"1.0","type":"link"}