Does that particular model have a fuel pump??? if so ck the fuel filter from pump to carbs??? also I believe this bike would have vacuume slides, ck the slide boots for cracking and pin holes.....will it rev-up at all or does it have a flat spot right at midrange...little more detail ...go after the easiest things first.... Hope I helped .........I have to check I think I may have a shop manual for this particular bike??? I'll check and leave you know.....