Post pictures of the cowling.----Start with a compression test on that crossflow !----Post the values here.----These motors are famous for broken rings.-----Motor is 1988 to 94 vintage.----Most parts are the same every year.
Post the compression test values.----Are the fuel jets ( FIXED ) clean ?----Does spark jump a gap of at least 3/8" on all leads ?-----Flywheel key checked ?----Any history on this motor ?