i have a older tr1100 that ran fine untill yesterday and kept shutting off after a couple minutes then was hard to start and now wont start at all. I replaced the plug, hoses.filter and still no luck. I did check and fuel is flowing pretty good and it is getting good spark when its cranking. Even adding a bit of fuel to the carb does nothing, but did help yesterday. i did test the kill switch and grounded it to the truck like i always did and only lost spark when i took it off the carb linkage. Any thoughts?