My 82 250r runs away when I start it. I can't find any air leaks, the reeds look fine and the carb seems ok.
First Time Rider
Arm chair racerNew to the board
My 82 250r runs away when I start it. I can't find any air leaks, the reeds look fine and the carb seems ok.
Got The Holeshot
Arm chair racerJust too addicted
It's either an air leak or it's not getting enough fuel.
Check fuel flow from tank and check float level.
Look up "leak down testers" and make one.
Maybe your crank seals? I'm not sure if that would make it rev out like that…
82 250r
83 Big Red
85 Auto-x
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Power User
Teaching quads a lesson
did you make sure your cable and slide arent binding up?
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Power User
Got the holeshot
It could be a bunch of things:
- carb slide stuck
- air leak
- not getting enough fuel
- throttle cable binding somewhere so its pulling the slide
- too small a pilot jet (causing a lean condition)
- Yes a dry side crank seal leak (ignition side)
Its scary as hell when they do that. I had a KTM 500 do this...scary when a big two stroke is reving like that and you can't stop it!!
The throttle cable on mine was binding up!
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1986 ATC 250r, 1986 Tri Z, 1990 LT 500R "Quadzilla"
Dirtbikes:
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1988 Yamaha DT
Got The Holeshot
Arm chair racerJust too addicted
The slide in the carb is in backwards ?.
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85 250r
83 atc 70
84 atc 70
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Trikein' Away
Lord of the trike
Did you recently mess with it?
How long has it been doing this?
Did it start acting up suddenly, or slowly over time?
What do you mean the carb seems ok?
Check for fuel blockages from the tank all the way to the intake.
First Time Rider
Arm chair racerNew to the board
I rebuilt the engine. It didn't do it the first few times I started it. It just kept getting worse every time I started it. I am getting fuel in the carb. It will run slow enough if the choke is on. I'm going to spray some WD 40 at it to see if I can find an air leak.
At The Back Of The Pack
Arm chair racerFirst time rider
Did you do a leak down test after rebuilding?
I would start by pulling the carb and checking that the slide goes down all the way... if it does, then do a leak down test.
84 YTM200E "yamahauler"
85 YTM200
85 KXT250 Tecate
First Time Rider
Arm chair racerNew to the board
A leak down test would tell me if I have a leak. But I don't have the equipment to do it.
At The Back Of The Pack
Arm chair racerFirst time rider
You can build one cheap, do a search and you will get a ton of ideas/materials to use.
In the long run it's great to have one on hand. And there is really no substitute.
84 YTM200E "yamahauler"
85 YTM200
85 KXT250 Tecate
Trikein' Away
Lord of the trike
revving but runs slow enough when choked, its probably lean.
Just Too Addicted
Arm chair racerJust too addicted
had same thing after rebuild on polaris 250 trailboss, somehow crank seals did not hold up replaced them again and cured it leakdown test is in order
you know whats right therefore you know what is expected
Power User
The day begins with 3WW
I think WD will just make it shiny. ? I've never used that method,I do use Ether. But you need to do a real leakdown test,as suggested many times lol
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New to the board
Arm chair racerNew to the board
Pull the bowl check the pilot and float valve especially if you running ethanol fuel probably orange goo in the float bowl limiting gas flow.if not then x2 on the air leak,should be easy problem to solve with right tools..
ATC 431R
First Time Rider
Arm chair racerNew to the board
I traded it for 2 200x's.
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