Runs fine on tick over and top end but when riding it up to a junction or roundabout down through gears runs bad under 3000 rpm like in wrong gear. have changed plugs coils leads carbs ect but still the same. i no they say fzrs run bad at low revs but makes you look like a *** when riding up to a junction..
SOURCE: 1984 Aspencade backfires in midrange RPMs
1. Check timing belts and ignition timing.
2. Service carburetors
SOURCE: 83 virago 750 under 3500 rpm runs bad. over 3500 runs good
hi,says here you had the carbs redone,it sounds to me like the carbs were not rebalanced after installation,if you do any work at all ocn carbs it is quite important that the carbs be properly rebalanced,it only takes very minor adjustments inside carbs(even a scratch on a jet)or different torque settings on screws etc will trow the balance out,if you get this done i think your problem will disappear..hope this helps
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