Hi! I've just bought a 1990 3LN FZR250 that only wants to run on reserve! When the fuel tap is in the 'on' position, it cuts out and dies. Also likes to stall when pulling up to stop. It's got a full tank of fuel, and I don't think it's the fuel tap because the previous owner apparently replaced it. Unfortunately the mechanics have failed to fix it, so I'm keen to hear if anyone has any suggestions as to what might be the problem!
My guess would be that something has lodged itself in the "on" pickup inside the tank... but if you say it has been changed then its got me stuffed. have you got it in the right position... pointing down should be on (or at least it is for me).
I'll have a look at it. The fuel tap has been changed but I don't know what condition the pickup is in. Thanks, let you know how it goes!
Blocked hose, collapsed pipe, crud in the fuel tap... there's something stopping that fuel from flowing! It puzzles me exactly why you say the mechanic couldnt fix it. Might be time to get a new mechanic. <!-- s:shock: --><img src="{SMILIES_PATH}/icon_eek.gif" alt=":shock:" title="Shocked" /><!-- s:shock: -->
Thanks for the help! The lines themselves seem to flow okay when pulled off, so I checked the fuel lines to the tap, and it seems that the new tap may have been installed with the lines for on and reserve swapped around. Swapped them around, it now runs in the on position, hopefully that's sorted it out. It still idles a little funny, in spite of the recent carby balance and tune! When it's revved up, it drops low on return to idle and eventually finds it way back, but occasionally stalls. Any suggestions?
My suggestion would be, the idle screws in you carbs are running rich. symptoms sound exactly like it. go back to your mechanic, and in your friendliest voice, tell him he did not do the job properly, the idle screws need adjustment. if he tries to charge you again, tell him where to stick his eftpos machine. thats my 2c. <!-- s --><img src="{SMILIES_PATH}/icon_smile.gif" alt="" title="Smile" /><!-- s -->
Yeah when i took my bike apart last time I put it back together with the hoses in the wrong place and had the same problem. Take the tap off and (i know it sounds gross) blow into each hole and you can work out which is the inlet and the two outlets by turning the dial between on and res. You may want to wash it first...
Adjusted the idle a bit and now it's running nice! Once the discs are straightened out it'll be sweet. Thanks for the help!
Re: Howdy, My machine has the same problem - won't run with the tap in the 'On' position, but runs fine on 'Reserve'. But will it now run on 'Reserve' ? Have you really solved the problem, or just changed the label on it? <!-- s:neutral: --><img src="{SMILIES_PATH}/icon_neutral.gif" alt=":neutral:" title="Neutral" /><!-- s:neutral: --> How does the On/Reserve system work? On an old bike I had, I know that it was simply a matter of 2 vertical pipes in the fuel tank, where the On pipe was taller than the Reserve pipe. Is the fuel extraction from the tank a simple gravity feed? I've heard mention of a 'diaphragm' in relation to this, but I'm not sure what that's all about. I'm planning on pulling things apart on Saturday arvo and trying to figure it out. Will I need any spares? o-rings or so forth? Thanks for any advice!
Pretty sure it has the same setup with the two different level intakes in the tank. The FZR has a fuel pump located external under the tank. Sometimes people don't replace them when they fail, but on a 2KR, the petrol won't run uphill to the carbs once the tank gets a bit low on juice. The bottom of the tank is higher on 3LN models. The diaphragm fuel valve is not fitted on the FZR. Can't help with what you need to pull the fuel valve apart, but have a look in the part list in the "HOW TO" section as there are exploded diagrams in it. Good Luck
So, it turned out that the line going into the "On" position was full of dirty little bits of metal. Nice. And it seems that somebody's solution to that was to swap the Reserve and Out lines, so then the On line would be linked to the Reserve line when the switch is in the On position. Clever. Or, Lazy - depending on how you look at it. Hooray for fuel filters in any case.
Unfortunately, the plot has thickened. Tonight I was testing to make sure I had the picked the correct lines to connect to the On and Reserve intakes on the fuel tap... Discovered that the tank would drain completely with either line. Looking inside the tank, I see that there are just 2 little drain holes next to each other at about the lowest point in the tank. I'm guessing something is missing? I've seen reference to a "pickup" when searching on this subject... Hopefully this is serviceable - it sort of looks like those 2 drain holes are in a plate which might be held in with a couple of bolts. Will have to take the tank off (again) and take a look under there. [Excuse me, I'm in danger of double-posting here, already wrote about this on a related thread: <!-- l --><a class="postlink-local" href="http://fzr250.com/viewtopic.php?f=2&t=2007&p=23765#p23765">viewtopic.php?f=2&t=2007&p=23765#p23765</a><!-- l --> ]
Sounds like someone has been in there before you. Hopefully another member can help with this, as I don't know what length tube you need.
