Hello, i have been silently reading many posts this past year since i bought my FZS600 and this forum really helped me a lot.
So i will try to describe my problem. I transformed an old but in good condition bike to a cafe racer. The bike had 40k KM on the clocks. I changed oil, sparkplugs etc. Did a complete service. The bike was working perfectly before and after the service, i even put some fuel cleaner suggested in this forum to clean the carbs even though they didnt have any problem. Then i synced the carbs myself.

I did 700KM since then without any problems. I only ride at weekends.


1 week ago i intalled some "dog bones" to make the bike higher up by 40mm. It transformed the bike riding wise. I did a quick 5 minute run around the block and was so happy. I am not sure if that did something to the bike but since then it all started.


Then at  night i decided to do a ride and after 1 km of riding my bike turned off at a traffic light. This never happened before... I quickly pressed the starter and it fired up ok. Then after 50 meter when i opened the throttle the bike was misbehaving. Like it was out of fuel or something even though it had half tank inside. I thought it will pass and after another 100 meter the bike cut off. like i turned the ignition off. Pressed the starter 20 times and the bike was not turning on. Waited 20 minutes trying to see if something was moved and i tried again.

The bike turned on ok and the throttle was responsive. Then after 100m it cut off again. And was not starting..
After many many attempts when it started i had to open full throttle with first gear and the bike was running at 10km like it only used 1 cylinder.. and when it reached 6k rpm it all cylinder fired up like crazy and then when i had to brake it turned off again.. and i had to do this 100 times until i got back home.

I visited a mechanic today but i m asking here if some of you have any ideas so i wont be ripped off.


Thanks and sorry for the long post.