Sealey 3 Piece Hook & Pin Wrench Set 19 - 51mm Special Tools A vacuum tester is great

A vacuum tester is great for testing the function of vacuum fuel taps and many other vacuum based systems found on modern bikes

but you need a spanner to use it rather than the supplied handle above

Give the pound through screwdriver another good tap and turn it

This holding tool is used in conjunction with a fork spring compressor

Sealey 3 Piece Hook & Pin Wrench Set 19 - 51mm Special Tools A vacuum tester is greatHardened and tempered drop forged Chrome Vanadium steel with recessed panel and satin finish. Specially designed for use with slotted retaining rings. Hook and pin interchangeable hinged arms covering sizes 19 51mm. Pin Sizes: 4mm.