Carburetter overflowing/ not starting TT600R '03

[sanderd]

hi all,

A couple of days ago the bike cut out on highway speed a couple of times, but after kicking it (the kickstarter i mean) it went on. I suspected and airlock: tankbag blocking fuelcap vent.

day before yesterday when crossing the border into Paraguay i noticed that my carb was leaking fuel. So i drained the carb and that seemed to work.

This morning i didn't start at all, so draining again. Didn't help. Took the old sparkplug out, was dry, which i think is weird after trying to start it for a few minutes. Put in an old spare sparkplug, checked if it worked first. No sign of life. Then the carb started overflowing again.

I have an inline fuelfilter.

Before i take the carb apart i really like to have some idea what might be the problem.

Oh, before all this happend i did a lot of bad washbordy roads through Bolivia a about two weeks ago. Bike worked fine after that till yesterday.

Can it be that due to vibrations etc. the carburettor bowl level changed?

Any info highly appreciated.

Sander

[Pigford]

Sounds like sh*te in the carb - Probably a build up of dirt in the fuel tank - got shock up and into carb...
Check fuel filter isn't blocked up - Disconnect fuel line and run fuel thru filter to see if its flowing OK. My 04 RE runs OK, but the fuel flows quite slow out of the tap - without a filter.
It only takes a small bit of dirt to hold the fuel float valve open and make it leak/over flow! Carbs will need a good clean out - look for sediment in bottom of float bowl - it may have by-passed the filter?

[sanderd]

hi,

fuel is flowing ok. i took the carb off and opened the floater chamber. looks clean.

so....

i read in my manual that the floaterhight should be 27-29mm and there's an other figure 'swimmerstand' which translates as floateradjustment of 6-8mm.

How do i measure that?

thanks,
sander

[Pigford]

Fuel level: 6.0 ~ 8.0 mm Under the edge of the carburetor body. Thats when you measure the actual fuel level in the working carb as fitted on the bike, using a special adaptor with a clear tube - like a manometer.

[aukeboss]

Sander,

The two values are different:
1. Floatheight 27 - 29 mm: measure with float bowl off, carb upside down, then distance between float bowl mating face and top of float must be 27 - 29 mm.
2. Fuel level 6 - 8 mm: as Pigford says, with running engine the fuel level above the float bowl mating face (carb installed of course) to be 6 - 8 mm.

The first one works for me.

While opening the float bowl, did you check the little filter on top of the float needle seat, better to remove anyway. When this is blocked it gives the symptoms as you described at first (stops at highway speeds, starts again etc)

Good luck
Auke

[sanderd]

Guys,

Thanks for the answers. i found the measuring method in a TTRE manual. Same carb.

Took the carb off - i think i found an almost non-violent way to do this ;-) - and it measured 25mm. Adjusted that and put the whole thing back together.

Inside of carb was clean.

So. The good news is: It stopped pissing nafta The bad thing is : It still doesn't start. I have a bit of action, more than before, but is doesn't fire upenough to catch on.

Played with/without choke and idle speed screw. Doesn't help.

Tomorrow i'll check valve clearance.

Airfilter is ok.

A bit more background: My TTR always had cold start problems in Hot and humid environments on sealevel like beaches in CA and Colombia/Ecuador or here in Iguazú. The last few months i spend in Equador, Peru, Bolivia and north chile/ north Argentina. So either dry, or on altitude or a combination. Always easy to start. What does that say about idle mixture?

Also, now i'm thinking of it, lately i give a wee bit of gas when starting. This developt over time, don't know when i developed this habbit.

Anyway, to be continued...

sander