Jims
JIMS, rocker arm shaft kit & hardware for M8
JIMS, rocker arm shaft kit & hardware for M8
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Precision machined from a low alloy nickel; chromium; molybdenum case hardened steel. Offers .0005" paralell tolerance on the flats of the shafts. Complete with a special stud & nut kit from 4130 steel for precision ''torque steady'' installation of the rocker arm shafts. Perfect for performance applications with increased spring pressure. Upgraded replacement for the OEM 17300053 (front exh; rear int); 17300055 (front int; rear exh) and 17300059B (set).
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Why buy from Forty5°
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Verified compatibility
Every part we ship is checked against your bike's platform, year, and engine. If it doesn't fit, we tell you before you check out.
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Workshop installation
Book a serviceHave us fit it. Book installation at parts intake — same-day on most jobs, master techs only.
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Founder-led aftersales
Get in touchQuestions after fitment? You'll speak to the people who installed it. We answer email and WhatsApp seven days a week.