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63MM STROKER CRANKSHAFT SET (CB250F/R - CBR250R- CMX250 REBEL - CRF250L/M/RALLY)

Brand : YUMINASHI

CAN$697.95
SKU:
13000-KYJ-630S
Availability:
Usually shipped out on Mondays & Thursdays (Except on Thai public holidays)...
Weight:
5,000.00 Grams
Minimum Purchase:
1 unit
Shipping:
Calculated at Checkout
YUMINASHI 63MM STROKER CRANKSHAFT SET (CB250F/R - CBR250R- CMX250 REBEL - CRF250L/M/RALLY) (13000-KYJ-630)
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01-wholesale-price-300pxl-p00.png● YUMINASHI 63MM FULL STROKER CRANKSHAFT KIT (CB250F/R | CBR250R | CL250 SCRAMBLER | CMX250 REBEL | CRF250L/M/RALLY) (13000-KYJ-630S) 

● This very complete stroker kit is intended to stroke your stock 249.5cc (15.23 cu in) engine, from the stock 55mm stroke up to a 63mm stroke.

● The stock bore and stroke of your 249.5cc (15.23 cu in) engine are 76.0 mm × 55.0 mm (2.99 in × 2.17 in) with a compression ratio of 10.7:1.

● By fitting the 63mm crankshaft with the shorter connecting rod, your compression ratio rises from a low 10.7:1 to a powerful 12.1:1 (or exactly 12.11:1), allowing you to easily beat any standard 300cc engine of the same type as your motorcycle.

● This stroker set comes with the 332cc/minute Fuel Injector, colder Iridium CR90EIX spark plug, cylinder, head, crankcase gaskets, and everything you need to get a powerful safe running stroker kit on your engine.

● Because the shorter connecting rod on the 63 mm stroker crankshaft compensates for the increased stroke at Top Dead Center (meaning the piston reaches the exact same height in the cylinder block as it did with the 55 mm crank), the clearance volume (combustion chamber area) remains completely unchanged.

※ Recommend to install our 14110-KYJ-240S Stage 1 Camshaft Set (LINK).

● OCTANE RECOMMENDATIONS FOR THIS STROKER CRANK WITH STOCK 250 PISTON:

  • Region: Rating System: Minimum Safe Grade: Ideal for Track / Heavy Load:
    Europe & Asia RON (Research Octane) 98 RON 98+ RON (e.g., 100 RON)
    USA & Canada AKI / PON (R+M/2) 91 AKI 93 AKI


● YUMINASHI 63MM FULL STROKER CRANKSHAFT KIT INCLUDES:

  • 1 x 13000-K0A-D04 | 63MM CRANKSHAFT CBR300R | LINK
  • 1 x 16450-B12-GUJC | 332CC/MIN B-TYPE INJECTOR (12-HOLES) (GUJ C-INJECTOR) | LINK
  • 1 x 16450-KYJ-K26 | DENSO TO B-TYPE INJECTOR CONVERSION SET | LINK
  • 1 x CR9EIX | CR9EIX IRIDIUM NGK SPARK PLUG | LINK
  • 1 x 13417-K33-D00 | GEAR, BALANCER DRIVE (35 TEETH) CB300F/CBR300R | LINK
  • 1 x 13421-K33-D01 | BALANCER SHAFT | LINK
  • 1 x 90742-KYJ-900 | KEY, WOODRUFF, 25X18 (CBR250 CBR300...) | LINK
  • 1 x 12251-KYJ-901 | 76MM STD GASKET, CYLINDER HEAD | LINK
  • 1 x 12191-KYJ-900 / 12191-K87-A30 | GASKET, CYLINDER CBR250/300R | LINK
  • 1 x 11394-KYJ-900 | GASKET, R COVER, CRANKCASE (CLUTCH COVER) | LINK
  • 1 x 11395-KYJ-900 | GASKET, L. CRANKCASE COVER / IGNITION COVER | LINK

budget-logo-2.pngLOCATED IN THE USA | AUSTRALIA |  PHILIPPINES? -WE PAY YOUR IMPORT TAX & IMPORT DUTIES!

  • Click Here if you would like to know if we are paying the import tax and import duties for your country!...

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