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Arm chair racerNew to the board
The needle and seat is removable by sliding out to one side the small diameter pin that the assembly hinges on. Just be careful to not lose the spring. I'd be willing to bet that this is your problem 'cause mine acted exactly the same way. It just could not handle all the fuel it was getting at low rpm's. Fouled plugs instantly. If you want step-by-step help on the needle and seat thing and proper jetting let me know. Let's get this "R" running!
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Arm chair racerNew to the board
The seat in mine is pressed in. The needle and seat do not leak air. I have tried different levels for the float. Its not the float level. Im not real sure what it is. Ive cleaned the carb the best i can. Can anybody tell me if a 60 is the stock sized slide? Also what size is the factory choke/idle jet? It may be something wrong with the choke/idle system, but it seems to work fine when i take it apart and test it.
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Arm chair racerNew to the board
The slide in mine is a 60. Not sure the size of the pilot. I'll have a look later today.
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Arm chair racerNew to the board
Ok thanks, good to know the slide size, I was begining to wonder if it was the factory one.
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Arm chair racerNew to the board
Pilot=42 Main Jet=150 Jet Needle=14 6 8 Altitude=800 feet
Runs like brand new. I'm not understanding why you cannot remove the needle and seat assembly.
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Arm chair racerNew to the board
I can remove the needle, I will try to get a picture of the seat.
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Arm chair racerNew to the board
Yeah a pic is worth a thousand words.
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Arm chair racerNew to the board
I made a few mistakes. The DGH needle is a richer than stock needle. And the lowest I have for a pilot jet is a 42 (though the 42 is not a keihin), not a 48. Like I said though I dont get much of a response in the jetting changeing needles or clip postions, or even the jets.
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Arm chair racerNew to the board
The stock needle like I run is what you should have. You seem reluctant to believe me about crud under the needle and seat so other than that all I can suggest is a spark plug cap and wire. I believe the plug wire is one piece with the coil, and these machines burn up coils more than most, so changing it out doesn't hurt either. Like I said earlier, my 86R flooded itself something fierce at idle to mid rpm too, until I cleaned out that crap which was not easy to find. You won't find a cheaper fix than that either.
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Arm chair racerNew to the board
Relucant to believe you? I have cleaned and cleaned the carb. Is something somewhere i cant get? Id say that its possible. But i dont think I can get the seat out without screwing up the carb. I will try to get a pic.
At The Back Of The Pack
Arm chair racerAt the back of the pack
Why is everyone making a HUGE deal out of the needle and seat. Reassemble the float bowl, put a small section of fuel line on (preferably clear), , dump some water down the line and see if it holds once the bowl is filled. Wiggle and the tip the carb a little to simulate riding, and if it holds, you're fine. Take the float bowl back off and let dry.
At The Back Of The Pack
Arm chair racerFirst time rider
There is a guy who has done this a time or two!!!!!!Good advice!Originally Posted by BigRedRunner
85 250r drag bike
87 trx 250r ESR big bore
Power User
Roostin Away
Could the crank case possibly have excess oil or oil fuel mixture lying in it from a leaking carb, like from before you cleaned yours? I've seen this happen before.
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Arm chair racerNew to the board
I have checked the needle by blowing air in it.(with my mouth lol). Yes that is possible daddio and something i havent thought of. When I first got it, it was running to rich on the bottom. Then is started getting worse and worse. I didnt think it would be no big I figured I would just rejet it. I was wrong about that, this has turned into a headache I cant figure out. One day I got a piece of trash in the seat and she flooded bad. It was pouring gas out all the overflows in the carb. So you could be right daddio, im going to check that right now. If thats not whats wrong with it I will still keep that in mind. I dont think I would have ever thought of that. Thanks for the help guys.
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Arm chair racerNew to the board
Ok I checked it out. There seems to be a little bit of fuel in the crankcase. But I dont think enough to cause problems. I blew it out, and it would come out in puffs, didnt sound like there was any liquid in there. I ran a small hose to the bottom and blew it out good for awhile though. But I think i might have found something I over looked in the carb. Is the needle suppose to bottom out on the main jet no matter what clip you have the needle at? I assume thats one of the reasons the needle ''cap'' is spring loaded so the it will let the slide travel on down even when the needle bottoms out. Mine barley touches the jet even on the highest clip. I cant believe I just now caught this as much as I have messed with the carb. It doesnt seal off good the way it is now. You can hold the needle down on the main jet without the slide and it seals fine. Except the needle that was in it when I bought it, it dont seal off no matter what. Its one of the silver needles. Im not sure if it was junk to start with or just wore out. So like I said the slide is a size 60, but are they different from bigger carbs? I bet this one is out of a larger carb. If somebody has their carb apart can they see if the needle bottoms out even on the bottom clip? It will be this afternoon before I can work on it but im hoping this is whats wrong with it. Maybe my other carbs will be in soon, but if this is whats wrong with it I think I can fix it so I can ride some this weekend.
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