i have a 01 660 with a pipe and jetted carbs k & n . Last ride was great until it stalled, now it will only fire up with a squirt of starter fluid and will barely run popping and backfireing. Carbs were taken apart cleaned and rebuilt using existing bigger jets from previous owner who abused it with little or no maintenance. pilot jets are adusted according to book. Should i do compression check first ? wanna ride please help.