Jims
JIMS, steel breather valve. +.030"
JIMS, steel breather valve. +.030"
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+.030" oversized breather is used to save worn or damaged crankcases. Manufactured from aerospace quality steel and CNC machined to the JIMS standard. Note: 48-E77 breathers must be used with 54-E77 style pinion and 70-E77 camshafts. Note: JIMS breathers can be used with L79-99 style steel breather valve thrust washers. Note: See 978343 JIMS breather hole reamer tool.
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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
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