Hey Ive read through a fair chunk of the forums trying to find a definitive answer before i go off and do anything. My Bike is running rich (not just when idleing) I can only find the idle mixture screw How do i fix it running rich? Sync Carbs and check float levels? Or is the idle mixture screw the way to go? Thanks Richard
start by checking your floats level to see if they're all the same and within spec. you can find a post around here showing how to do so with a tube hooked up to the fuel drain outputs and/or take the carbs out, and open the float bowls then measure them with a dial caliper, should be around 12mm for an fzr 2kr. then the factory settings for the air-fuel mixture screw is 3. that means, you turn the air/fuel screw "clockwise" till it stops (DON"T FORCE IT)... then u reverse the procedure counter clockwise, and set your screw to 3 turns from fully in. don't forget to do so on the 4 carbs. you need to adjust your idle speed, (1600 RPM)....i know it's kinda hard to figure it out as the tachometer on the fzr start from 3000 rpm... adjust your screw manually till you reach the 4000 rpm, and start going down till you reach 3000 RPM. then turn the bike off...and check visually how many turns you can do (counter-clockwise) until the screw slightly began to drop off the throttle cable. divide that in 2 ---- and that would gives you and idea at least.... start the bike, if it stall, adjust the screw just a little bit... now it's time to "sync" your carburetors....personally i use the 2 bottles technique.. it's quite simple, you need a 6mm transparent hose, mine was like 10 feet....(the better the more confortable to work with) you need 2 baby bottles or something similar, with rubber caps. 1 hose goes throu the first bottle, the other hose throu the second... and 1 small piece of hose between the 2 bottles.. the hoses that goes from the carbs need to be at the top of the bottle....the hose between the 2 bottles should reach the end of the bottle. FILL the 2 bottle about half with water and/or oil.....i like to use 10/10 oil, it's has more viscosity wish gives me a better reading. that picture should give you an idea of how it's made: http://www.sportbikes.net/forums/at...155439146-carb-sync-gauge-motorcycle2-001.jpg you plug the hoses to the first and second carb...now start the bike, and look at your bottles, what you want is to make the oil level between the bottles the same... there's a screw between carb 1 and 2-----2 and 3----3 and 4. turn the screw slowly either way till you get it nice and leveled.. then move on to carbs 3 and 4.... and at last carbs 2 and 3. now you should have 'em all balanced... that's pretty much everything involved in the process.... good luck mate, and keep us updated
Just one quick one for Cameleon - when you balance the carbs, are you using the screw that keeps all the butterflies synced up? Or the idle mixture screw?
The Idle screw to lower or raise ur RPM is located just in the middle of ur 4 carbs ( it is obviously a BIG SCREW HEAD). just underneath the hose that goes from ur fuel pump to the carbs. While the other screws to balance the carbs, you have actually 3 of them. between the 1st and second, there is one, between the 2nd and 3rd, and the 3rd and 4th. those are more smaller screw heads !!!
