There is no doubt that the lifeblood of your Harley-Davidson’s Twin Cam engine is its oiling system.
Crucial to oiling yet often overlooked are the piston jets. Located deep inside the Harley-Davidson’s engine cases, it’s hard to verify whether the piston jets are functioning properly…until now.
The new JIMS Mini Valve Spring Test Gauge No.1090 provides a solution for accurately checking valve spring pressure on Harley-Davidson motorcycles.
This easy to use spring tester may be used in a bench vice or an arbor, hydraulic, screw, or drill press and will check any Harley-Davidson style valve springs, including early
and late Conical Springs.