Long story short , went to squires on Saturday with mate on his ypvs and me on Rd350, bike ran great all day, went out on Sunday and bike starts miss firing and won't rev past 3k , left hand cylinder exhaust is cold , changed coils same issue any ideas ,ignition ?
Last Edit: Sept 11, 2019 11:48:02 GMT 1 by gordong65: spelling
hello, its almost certainly carb related. i would take the left carb off, thoroughly clean with carb cleaner aerosol, then, and this is the important bit, use compressed air line or air duster to finish blasting out the passages, especially the air screw/idle air passageway. this was the difference between running on one cylinder and running on 2 on my RD350 YPVS. just using carb cleaner, there will be residual fluid in the air passage that will not be cleared via engine suction alone, it MUST be blasted through with compressed air. hope this helps.