Doing a lot of repairs to a Honda 1985 motorcycle so I can list it and sell it.
The turn signal button assembly was broken (ever since I've had it). It needed a knob of some sort. The only thing extending from the handlebar switch was a sharp 1/4" x 16± gauge tang. It extended about 5/16 inches and was obviously broken short. I managed to remove it. After some head scratching I decided not to weld on an extension. Instead I took a 1/4x20 bolt, slit the end on my 4"x6" band saw to a depth of 5/16 inches. Prior to pushing the tang into the slotted bolt end, I threaded a 1/4x20 die onto the bolt. Inserted the tang into the slot and ran the die back down on the bolt so the tang edge is now threaded. (BTW, the tang ended up to be a very tight fit). Cut off the bolt head so I could remove the die. Cut the whole assembly to match the depth of a stainless steel acorn nut. Solid as a rock.
Alternative was to buy an entire grip/switch assembly from Honda for lots of $$. It's sure a nice feeling when you can mend/repair a part instead of replace.
Ivan Vegvary