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Carb float bowl valve
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It will be under the gasket so if you have'nt taken the gasket off it will still be there. If not i'm not sure how it would go without it??confuse 

If you want to buy it go to www.powersportsplus.com or www.boats.net or fowlers ect.

I can verify the service www.powersportsplus.com provides is second to none. Great customer service ect. Waiting on an order atm actually.

 

Part number # 
394GY-14272-00-00VALVE, CHECK SEAT$12.96$8.811  

........................

Jarrah.



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It squirts fuel through it past about 3/4 revs. If you fill your carby bowl & push down gently on the diaphram assembly (part number #38 in diagram) you will be able to ''check'' your diaphram also.

Warning: Do not stick your head close or petrol will squirt in your eyes.

..............................

Jarrah.



-- Edited by barra8 on Friday 28th of September 2012 06:11:23 PM

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Carb float bowl check valve
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Has anyone stripped a carb and found this item missing? I stripped and cleaned mine the other day and then had a look through one of Brian's guides on carbs and found I didn't have the valve in the photo below. I can't see how I have lost it but not sure how it would run if missing?

Sorry for stealing you pic Brian

Carb_strip_008.jpg



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RE: Carb float bowl valve
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Hi jarrah

Thanks for the help, i had already removed the gasket but i cant remember seeing it. Searched all over etc. what exactly does it do?

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Thanks for the info jarrah I think it must have been missing from when the previous owner has had the carb to bits as I have only run the bike at low revs round the garden so wouldn't notice any problems. I will maybe try and source a new valve from the uk if they aren't to expensive.

Adam.

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No problems,i enjoy helping people.

As you said you would have to go further than round the yard (over ''3/4 revs '' cruising) to notice.

Brian will know a good place to buy it in the UK.

...........................

Jarrah.

 



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TTR250ACTIVE''BORED'' ADDICT!

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Yes there is 3 places I do my bike part shopping in the uk , totally ttr's , motoward and eBay! Hopefully Brian might be able to help me out

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Good luck finding it cheap enough,should'nt be much.

The other part number that will fit is 4GY-14272-00

..............

Jarrah.



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YAMAHA ROCKS!!!!!!

TTR250ACTIVE''BORED'' ADDICT!

Favourite quote: To be old & wise first you must be young & dumb!

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domski1 wrote:

Hopefully Brian might be able to help me out


 Check your email Adam wink



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barra8 wrote:

... If not i'm not sure how it would go without it??confuse 


-MY First thought too Jarrah!

  Domsk1,

I noticed the same thing last weekend when I tore into my carb for MY first time.

I am pretty certain that the only other time carb has been off, was when my local shop had blown pilot jet out last summer. I thought he lost/left it out by mistake. Does anyone know if this a common issue?

 I own a US sold bike from central Texas. Did Yamaha's "Quality Check" folks not catch this or just leave this out? I kinda think so now that I read this post.

 ...I ordered "brass thingy" couple days ago. It's all I am waiting on before I throw mine back together. Wonder if this has been my issue, instead of clogged Pilot jet??

I'm confused2! 

greg



-- Edited by texasT on Tuesday 12th of March 2013 11:52:30 PM

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Greg-

I would like to know what the problem is with your carb? If you can explain it well enough, maybe I can help.

 



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TT-R250M,
So sorry I have not replied to your question, I have just worked a 28 day straight stretch and have not been around lately.

According to the very well written instructions by Brian, posts by TT-R250M and barra8 (COME BACK MAN!) I tackled my first carb cleaning (of this bike) since I bought it (I have torn GM's 'RottenChester' and a Holley on some of the cages I have owned). Ya'll put confidence in my old hands. I don't have a ultra-sonic cleaner like some of you, I just used carb spray, a small brush & several wooden toothpicks to get most of the crud off. It wasn't really that dirty, it had been cleaned last year and not ridden much since then. I will say that ethanol is a HUGE problem around here and I now use a treatment for that.
I got a new check seat valve (it was missing!-see previous post), new main and pilot jets (both were a little dirty and are hard to clean, so it's only $$$), bowl gasket, diaphram & spring and little rubber seals. I should have checked float height, but I forgot.no

I finally a chance to put it all back together yesterday. After a couple seconds on the starter, she fired up like a champ!
I rode it a bit in the yard (1st gear only) and everything seems to be going right so far. Friday I plan to take my grandson to the lake where we can really test her out.
I'm using the NGK-CR7E plug, slightly hotter than the stock CR9E, & noticed that it doesn't take long to get started and warm up. The guy at the shop I go to put the CR7E plug in the last time he fixed my carb and I have yet to even pull it for checking color. I will do that once I get a hard ride in.
Before I cleaned carb, I noticed exhaust pipe glowing pretty RED-HOT when I would run it for a few minutes. Now, I figure it was because the jets were dirty and it was running lean? I didn't notice any glow today, but I didn't run it hard or for more than about 5 minutes. I am 2 turns out on the air screw (or is it fuel screw, cause it is not on the air side of the carb?? I always thought that was how you tell the difference but sometimes I get mixed up) confuse

Brian, I have yet to put the parts on I got from you, but hopefully I will get that chance soon!

Thanks for everything folks, I really enjoyed fixing this myself.

greg



-- Edited by texasT on Tuesday 23rd of April 2013 02:39:30 AM

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Hi all,

I stripped my carb the other day to clean it out. I fired up the TTR after it had been sat for an indecent amount of time (due to the arrival of a very small person in the household) and it was leaking fuel out of the carb area when it ran. I assumed that the jets had blocked up with it being sat for such a long time.

Anyway, the white plastic thing in the picture isn't in the carb. It has run fine without it, but presumably it should be in there. Also, when I took off the smaller cover with two screws as per Brians guide, there was some kind of gunky red stuff round the perimeter, which I guess is liquid gasket sealant. Does it need more when I reassemble it, and why would it be there in the first place if not?

I reckon that to reassemble when I've cleaned it I will need the black carb body gasket (which looks flat to me) and  the white plastic thing as above. I take it motoward would be as good as anywhere? I used an American place in the past, but the name escapes me.

Thanks in advance,

Pete



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Pete Brown

Keighley, West Yorkshire

'94 Yamaha TTR 250 Raid (with Open Enduro headlight, grrr...)

'54 plate Suzuki GSF 650S (Bandit)

Previously Yamaha YBR125, Yamaha TY125, Yamaha TY250



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pedrosan wrote:

Hi all,

I stripped my carb the other day to clean it out. I fired up the TTR after it had been sat for an indecent amount of time (due to the arrival of a very small person in the household) and it was leaking fuel out of the carb area when it ran. I assumed that the jets had blocked up with it being sat for such a long time.

Anyway, the white plastic thing in the picture isn't in the carb. It has run fine without it, but presumably it should be in there. Also, when I took off the smaller cover with two screws as per Brians guide, there was some kind of gunky red stuff round the perimeter, which I guess is liquid gasket sealant. Does it need more when I reassemble it, and why would it be there in the first place if not?

I reckon that to reassemble when I've cleaned it I will need the black carb body gasket (which looks flat to me) and  the white plastic thing as above. I take it motoward would be as good as anywhere? I used an American place in the past, but the name escapes me.

Thanks in advance,

Pete


 If it was leaking fuel I would suggest that either your float valve has contaminants, the air boot has cracks/leaking or the accelerator pump O-rings or diaphragm is perished.

The fuel baffle should be installed, it stops the fuel sloshing about inside the carb and maintains a good fuel flow to the main jet. Not a biggie without it though.

Someone must have used gasket goo on the accelerator pump O-rings to ''TRY'' to stop it leaking. It will not work and should not be used! I use rubber grease on all O-rings and the diaphragm for a long lasting perfect seal.

Make sure that you check that your accelerator pump nozzle is not blocked (common problem). More details here- http://ttr250.activeboard.com/t56226503/mid-rpm-range-bogs-down/

If you don't mind waiting on parts, you can use http://www.boats.net/ or http://www.partzilla.com/. I have heard www.partshark.com is good also.

Jarrah



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pedrosan wrote:

I reckon that to reassemble when I've cleaned it I will need the black carb body gasket (which looks flat to me) and  the white plastic thing as above. I take it motoward would be as good as anywhere? I used an American place in the past, but the name escapes me.

Thanks in advance,

Pete


I agree with Jarrah not to worry about the baffle - quite a few carbs I have stripped haven't had them.

If you are in a hurry for the float bowl gasket then try here wink

Brian



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Cheers guys. The advice is as always appreciated.

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Pete Brown

Keighley, West Yorkshire

'94 Yamaha TTR 250 Raid (with Open Enduro headlight, grrr...)

'54 plate Suzuki GSF 650S (Bandit)

Previously Yamaha YBR125, Yamaha TY125, Yamaha TY250

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