02-08-16, 04:46 PM
(02-08-16, 04:24 PM)Dave48 link Wrote: Dont know if this helps but I recently ordered 4 carburettor overhaul kits from M & P direct. They came in packaging showing maker "Tourmax"made in Japan suitable for FZS 600 1998-2001. ref no 7245384 Vergaser (German for carb) Rep STZ CAB-Y73. Cost for four inc p&p £42-95.
Fitted fine & bike running well. Cant say I noticed any markings on actual needle valve assemblies but my eyes are as old as the rest of me-dont ask! I can understand variation in size of main,pilot,starter jets but why would there be a need for different sizes of the needle valve?
Sounds like you have an over supply of fuel on 2 carbs-maybe recheck condition of "O" rings,floats, & float heights on offending carbs.
The only reason I could think of is to get a faster fuel flow when racing, if the throttle is pretty much wide open most of the time then the bowls would fill up faster with the bigger needle valves. The "O" rings are just a few months old and fine, the floats have been left submerged in fuel and came up without a drop inside so they don't seem to be leaking, the tangs on the floats are bent way much to my liking and compared to how they were originally.
I remember that it was a massive pain to get the fuel level right, both with the original and the new needle valves. One minute I almost had it and after a minor adjustment it changed drastically like something was leaking. Could there be a crack in the carb body?