Plastigauge PLA To Measure 0.001" - 0.007"

Plastigauge is ideal for measuring clearances and Stationary Engine Parts seems to be one of few places that sell it in UK. The price here was one of the best. I bought it to measure big end clearance, shell bearing, on a single cylinder motorcycle with close flywheels. I could not have got a metal feeler gauge in.

Advantages: Can measure clearances on curved surfaces
Can measure in tight places.
Very simple to use
Clean to use

Disadvantages: One set doesn’t do all the sizes, a mixed packet would be good