Where to find oil drain plug size?

['73 H1 Triple]

Originally Posted by Mrs. Colleen

...unless anyone knows if the bike shop would be able to drill it for me?

PM sent

Jeff

[Cutty72]

Originally Posted by marko138

Really? My oil plug is a standard deal. 3/8" plug I believe. The filter is a standard screw on...which is a K&N...which has a nut on the end pre-drilled for safety wire.

Firebolt = HD engine
1125 = Rotax engine

the Drainplug on the left side by the filter is flush mounted. the one on the right is a standard plug, but metric sized.