First Time Rider
Arm chair racerNew to the board
85 big red carb I am rebuilding is missing a jet. I have done hundreds of these carbs and never seen one missing the small jet. I have the pilot, I have the main but the little jet beside the starter jet is missing and it isn't even threaded to accept one.
First Time Rider
Arm chair racerNew to the board
First hole is the position I am talking about
Power User
Got the holeshot
I'm pretty sure that a little rubber plug goes in that one. Flyingw would have more info. He is somewhat of an 250es ninja.
"Roll on 3"
RIP Ol' Deuce
"Long Live the ATC"Building: ATCr125xRiding: ATC200sx"I am not a mechanic, mechanics get paid for this. I do it because I enjoy it."
Power User
The day begins with 3WW
Does it have a Keihin number on it
like QA 01 or similar?
Some have plugs there and later, plugs into the side of that jet stack.
I can try to look at one tomorrow if you can get a # off yours
First Time Rider
Arm chair racerNew to the board
It's a qa 04. Is the tiny jet not used?
First Time Rider
Arm chair racerNew to the board
The other 2 85 carbs I have done had all 3 jets.
Power User
The day begins with 3WW
not to be a wise guy but did it run the way it is now?
Been so long I forget but even trying to get info from Keihin directly was
like musical chairs and I distinctly remember getting absolutely nowhere.
Almost time for flyingW to chime in, I hope.
I have one to do right now and at this stage of my life, I HATE surprizes.
do parts diagrams from servicehonda or bikebandit help at all?
I guess I'll be looking at those before my next autopsy and will
report back if I find anything of interest.
sn: so you didn't find a rubber plug rolling around in the float bowl?
At The Back Of The Pack
Arm chair racerFirst time rider
I just rebuilt the carb on my 86 and it was the same except it had a rubber plug inplace of the jet.
First Time Rider
Arm chair racerNew to the board
It had an extremely high idle like 2500 probably. There is no rubber plug. 86 up had the plug and a starter jet in the side of the pedestal. The 85 isn't suppose to have a plug. I'm telling you this thing is weird. It also never had the updated vent hose kit. It started cold like a champ though.
Power User
Teaching quads a lesson
The QA04A carb is off of the 85 TRX250. The primary jet is not used on the TRX. I have tried to run the TRX carb on my mockup and on my SX and they don't run very well unless the intake is partially blocked restricting air flow.
First Time Rider
Arm chair racerNew to the board
Well I'll be. That is awesome flyingw. Thank you for the info. I have another carb. I'll check the other carb number.
Power User
Teaching quads a lesson
If you have an 01A, 02A, 07A, or 08A, you're good. The odd numbers are ES and even are SX. Any one of those carbs will work on any year ES or SX. They all interchange. The 04A is not a good replacement for the ES or SX.
Power User
Roostin Away
guy is a carb jedi
Wubba Lubba Dub Dub!!!!!
TRIKES:
86 250r
85 250sx
86 250sx
84 Yamaha 225DX - Bruins Trike
85 Yama 225DX - The Rental!
150cc Piranha powered 70
110cc Lifan 70
82 70
83 ALT 50 Trail Buddy
88 Yamaha BW 80
84 z50
First Time Rider
Arm chair racerNew to the board
Man you have a wealth of knowledge. So someone has "tinkered" with this beauty before apparently. I am curious how you found out this carb info. Any manuals or service info?
Power User
Teaching quads a lesson
Here is my tutorial on rebuilding these carbs.
http://www.3wheelerworld.com/showthr...54#post1257154
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