I am removing the stock ignition off of a 1983 Shovel, having trouble with the trigger rotor cup bolt.
At this point the head is starting to round out. The parts manual says 10/32 1/2 inch. The head of the bolt I am looking at is 5/16. Prior to trying to remove it I have been using penetrating oil . I thought of cutting a slot in it and hitting with a impact driver but worried about the cam. Have not tried heat yet.
Bolt seems soft enough (like cheese) so I could drill out but hate the thought about all those metal filings.
Never mind - seems the last shot of PB Blast worked!