Jims Valves Collars

3 products — part of all Valves Collars

JIMS USA has built its reputation in the Harley-Davidson aftermarket on precision engine and drivetrain components machined to the tight tolerances that professional rebuilders demand, and their valve collar range is a product of that same engineering discipline. Covering 1984–2004 Evolution Big Twin engines, Twin Cam B-cam applications, and 1986–2003 XL Sportster models, JIMS valve collars are the hardened retainer cups that locate between the valve spring and the keeper set. Their dimensional accuracy is fundamental to correct spring geometry — even small deviations from specification can cause uneven spring loading, accelerated keeper wear, or valve float under high-rev conditions. For mechanics rebuilding Evolution-powered Harley-Davidson models or upgrading valve trains with performance camshafts, sourcing valve collars from a specialist manufacturer like JIMS eliminates the uncertainty of generic aftermarket parts. Iron City Motorcycles, your authorised Harley-Davidson dealer in Leeds, stocks JIMS precision engine components with expert technical advice. Browse the full Jims Valves Collars range below.