Help! My 99 cbr900 just refuses to start
about a week ago I had her running badly - backfiring & didn't like to rev and had to use a funnel connected to a pipe going into the carbs to get her to run as she wouldn't run from the petrol tank! Since then I've cleaned the carbs again and used a compressor to blast air through all the tiny holes, dissasembled the petrol tank valve and cleaned it out, all spark plugs are good (new last week), checked plug leads are connected right way round (from workshop manual), checked have good voltage going to spark plugs but still all it will do is turn over. Any ideas?