The Jims Dual Gauge Leakdown Tester, No. 782, can be used on all Harley-Davidsons, including Twin Cams, as well as on aftermarket motors. The hose assembly has both 14 mm and 18 mm spark plug threads. Techs can use the tester to troubleshoot cylinder leakdown problems such as valve seat issues, bad rings and bad head gaskets.
Contact: Jims USA, 805-482-6913, www.jimsusa.com