honda XR125 '03 basic carb questions. come help a pure noob!

BrownTownXR · L Plate Warrior Joined: 30 Sep 2015 Karma :

so i saw a video on youtube watching someone clean out their carb, and since the XR125 i just brought has been sitting in a garage most of its life i figured i'd give it a clean.

ive just put the carb back on and when i try to start it, fuel comes pouring out of the bottom hose, like a tap, until i turn off the fuel switch.

i think what ive gone and done is unscrew the fuel mix screw and when i put it back on i tightened it pretty much all the way.

Am i right in thinking this is whats wrong? If so do i just unscrew it a small amount until it runs?

Or is it something else?

The bike was running before i put my hands on it Sad

EDIT: in this thread ( https://www.bikechatforums.com/viewtopic.php?t=211774 ), the 2nd post says to turn the screw 1.5 - 2 turns out. Does this mean 1.5 - 2 turns from loose, or 1.5 - 2 turns from being thight?

Thank You.

Suntan Sid · World Chat Champion Joined: 07 May 2009 Karma :

BrownTownXR · L Plate Warrior Joined: 30 Sep 2015 Karma :

thanks for replying sid,

im sure its the float valve, i removed the valve (by mistake thinking i needed to) and took of the bowl, sprayed some carb cleaner around, then put it back together. And when i say that, i mean i put the bowl back on, screwed in the valve.

so how should i go about this?

thanks a lot for your help, i start work at 5am tomorrow and really dont want to cycle!

EDIT: this is the screw I took out and put back in, that's it. https://i.imgur.com/UVJZvt0.jpg

Suntan Sid · World Chat Champion Joined: 07 May 2009 Karma :

I don't know that particular carb, I think it's similar to a CG carb, but I would guess that is the pilot jet, so you need to find out how many turns out it needs to be!
____________________
"Everybody needs money, that's why they call it money!" Cool

BrownTownXR · L Plate Warrior Joined: 30 Sep 2015 Karma :

two different sources said:

1.5 - 2 turns
2.5 - 3 turns

no matter what i tried it just poured fuel from the drainage hose coming from the bottom of the carb.

Iain. · Could Be A Chat Bot Joined: 04 Dec 2014 Karma :

Thats an idle mixture screw.

The float valve is stuck, nothing to do with that.

BrownTownXR · L Plate Warrior Joined: 30 Sep 2015 Karma :

so ive just took out the float & needle, given the needle and the part it slides into a blow and spray, put back together and as soon as i turn the fuel on it starts leaking.

when i push the float, im pretty sure its pushing in that tiny part of the valve too.

Iain. · Could Be A Chat Bot Joined: 04 Dec 2014 Karma :

Islander · World Chat Champion Joined: 05 Aug 2012 Karma :

It may also be that the seal on the float valve is damaged or perished. Thumbs Up

BrownTownXR · L Plate Warrior Joined: 30 Sep 2015 Karma :

Thanks for the help guys, I'll be back on the case when I'm back from work in a couple of hours with an update

BrownTownXR · L Plate Warrior Joined: 30 Sep 2015 Karma :

Teflon-Mike · tl;dr Joined: 01 Jun 2010 Karma :

The Kehin PD crbs have a drain screw o the bottom of the float-bowl, that when undone, 'drains' the fuel in the float bowl out of the over-flow pipe.....

Other-wise, if fuel is coming out that over-flow.. then the float-bowl is over-flowing! Only way that can happen is if the float isn't closing the inlet off when the correct level is reached.

Ergo.. IF fuel is coming out of that pip and pipe on the bottom, it isn't going to be aything to do with the jets, needles, pilot-air-screw or anything else.
____________________
My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?'

Islander · World Chat Champion Joined: 05 Aug 2012 Karma :

BrownTownXR · L Plate Warrior Joined: 30 Sep 2015 Karma :

so my friend has just left, he brought a carb over he had which was very similar to mine, and has come to the conclusion its the float valve seat.

i think he held my valve to his seat whilst it was connected to the fuel line, and it was ok, then tried both his and my valve in my carb seat and it leaked. Thats if i remember right, it was the last thing he did and the only thing i didnt see for myself.

He couldnt get the seats out of the carbs, as he said he didnt want to damage the inside of them just incase. Any tips on how to do this?

Im going to go to the local honda shop and order a valve seat tomorrow (is it possible they could stock them without the need to order?).

Thanks for your help its greatly appreciated!

btw, i found a pic of the inside of the throttle slide part and got it in and holding the needle in place earlier(hoping it would be a solution to the problem)