Yamaha king of road Posted April 23, 2011 Share Posted April 23, 2011 HI! I'm new here and I have a problem that's driving me crazy... My yamaha FZR1000 exup deltabox (1993) has an overflow problem with fuel. and I dont know where can I fix this or where is a valve for regulate a fuel intake in to the carburators? please can you help me with some instructions for fixing my problem? thanx alot! Link to comment Share on other sites More sharing options...
pilninggas Posted April 23, 2011 Share Posted April 23, 2011 HI! I'm new here and I have a problem that's driving me crazy... My yamaha FZR1000 exup deltabox (1993) has an overflow problem with fuel. and I dont know where can I fix this or where is a valve for regulate a fuel intake in to the carburators? please can you help me with some instructions for fixing my problem? thanx alot! usually crud in the carbs (typically for cylinder 1 or 2) or fuel levels too high. Take the carbs off and take the float bowls off - one at a time - what you will probably find is a small (can litterally be a speck) of muck which prevents the float valve shutting the fuel off. Seen it many, many times. ++++ introduce yourself over in the newbies section please ++++ Link to comment Share on other sites More sharing options...
Yamaha king of road Posted April 23, 2011 Author Share Posted April 23, 2011 usually crud in the carbs (typically for cylinder 1 or 2) or fuel levels too high. Take the carbs off and take the float bowls off - one at a time - what you will probably find is a small (can litterally be a speck) of muck which prevents the float valve shutting the fuel off. Seen it many, many times. ++++ introduce yourself over in the newbies section please ++++ so when I take off those valves and have a look at those floats what next to do? clean them and it will work fine? or is better to give that to some specialist for carburators. Link to comment Share on other sites More sharing options...
pilninggas Posted April 23, 2011 Share Posted April 23, 2011 so when I take off those valves and have a look at those floats what next to do? clean them and it will work fine? or is better to give that to some specialist for carburators. each carb has a float bowl (you can remove them with the carbs on the bike, but it is a pig). Take the carbs off, flip them over and take the float bowls off once at a time. You may well see muck in the bowls (off course it may now be on the chamber ceiling, as the carbs are inverted. I usually clean these deposits with thinners, WD40, carb cleaner etc. Each float bowl chamber, will have a bank of floats, these are orange plastic (check each one for holes or damage as this will cause problems). Very carefully remove the float pivot pin (don't lose it!). Then ease the float out and the valve 'torpedo'. Clean those orifices (oh-er missus). My experience is that you will see specks in end of the hole that the 'torpedo' sits in, you can blast this away with WD40/straw. When reassembling, you must seat the float o-ring correctly - i always use a tiny, tiny amount of fairy liquid to ensure this happens. When playing with the floats you may put the float heights out, all I can suggest is to go very carefully and treat all the parts like they are made of gold leaf. You could of course set the float heights---- These carbs wear out badly, google fzr1000 emulsion tubes for a whole host of trauma. Tuning them is a real challenge, the ones on my EXUP have been off tons of times. At the moment I have my spare TDM carbs (the same type Mikuni CV downdraft), they are worn on the tubes (perceptible amounts of ovalling) and the float heights (fuel levels) were out. This all leads to rich running. Look at your exhaust is it sooty? If so the carbs are rich and may require work. Link to comment Share on other sites More sharing options...
Yamaha king of road Posted April 24, 2011 Author Share Posted April 24, 2011 thanx a lot I will try that carbs to reasambled cuz i have another carbs for my fzr 1000 exup but they are preaty dirty... so I will try to clean them tomorow and I will post here if any changes are made for now thank you Link to comment Share on other sites More sharing options...
Yamaha king of road Posted May 2, 2011 Author Share Posted May 2, 2011 hello. I clean the carburators and now it's running nice... Thanx for advice it was helpful ... Link to comment Share on other sites More sharing options...
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