1980 tomos bullet
At high speed (relative to mopeds....25-30 mph) the engine seems to pulse or shake. Note that this is a vertical shake, not side to side. If i bomb down a steep hill with the engine killed at the same speed I don’t experience it so I don’t think it’s the wheels or tires. The moped handles fine and runs well. Always starts easy.
Has anyone else experience anything familiar?
Worn Bushing in the Conrad? bearing going out some where internally?
Thanks for any ideas.