Feuling
Feuling, relief valve plunger, spring & roll pin kit
Feuling, relief valve plunger, spring & roll pin kit
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Fits stock cam support plates. The Feuling spring increases the pressure relief valve pop-off PSI. Note: Feuling recommends bench testing with the Feuling cam support plate pressure test tool; 566117; to set pop-off pressure to your preference and to ensure correct valve seal and valve operation. Note: See 566111 for a replacement relief valve plunger only.
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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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