Two Stroke Motocross
Two Stroke Motocross Forum => Technical => Topic started by: Braap257 on July 29, 2010, 01:40:21 PM
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Okay i know it sounds dumb. But where is the choke on a 2004 yz250? Im curious if there is one. The bike starts 1st kick regardless. but i know it must have a choke.
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At the front left of carb. Just in front of the vent hoses.
It has a black knob on it.
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At the front left of carb. Just in front of the vent hoses.
It has a black knob on it.
Okay i found the actual "choke" Knob. But that brings me to the second question. How does it work? when i pull up on it, it just springs back down??
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You need to pull up harder until it "clicks"It should stay.If not,unscrew it and have a look.If your bike starts without it,you're jetted too rich.
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I will try to make it click. I dont believe its jetted too rich but meh im new to this thing so i could be wrong. thanks for the info ford.
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Okay it does click. So im guessing with a cold start i should turn the gas on then choke it then give her a kick. are you supposed to leave it choked for a bit or just start it with choke then turn it off?
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If the bike is jetted properly you should only need the choke on 5 seconds or so.
It will depend on air temp tho.
Just keep the bike going with abit of throttle.
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What I usually do with my bike (which is jetted quite lean) is to turn on the gas, turn on the choke, then give it a couple gentle kicks to get things going in the crankcase. Then when I kick it for real, I keep the throttle off and it usually fires pretty quick. I leave it running with the choke on for a few seconds, then when I turn it off I listen to whether it wants to die or not. If it sounds like it's going downhill I'll put the choke on a little longer, then try again. Usually after a month or so of sitting it's good to go in well under a minute.
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Okay thanks for the info guys. I will keep it in mind!! :)
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I have 2 bikes that do not have chokes, they have what you call a tickler. The tickler does one of three things.
1. Nothing
2. Primes the engine so it can start
3. Floods the engine
I have found that it's usually 1 & 3 for me, I've never mastered the art of cocegas.
So, for those bikes I have a most unusual starting method. I take a hose and blow into the overflow for a few seconds. Then I just kick it with the throttle closed and it usually starts within a kick or two.
How to start a KTM 495 (http://www.youtube.com/watch?v=Gj4vaaZnQFk#ws)
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Yea + i think the heat here in Florida makes the choke unnecessary. You're lookin at 90+ degree weather every day...
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I've been to Florida a couple of times, I can't imagine how an engine can run in that air. Honestly I think there's less humidity at the bottom of the Columbia River.
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lol yup. Very hot and Humid.
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I have 2 bikes that do not have chokes, they have what you call a tickler. The tickler does one of three things.
1. Nothing
2. Primes the engine so it can start
3. Floods the engine
I have found that it's usually 1 & 3 for me, I've never mastered the art of cocegas.
So, for those bikes I have a most unusual starting method. I take a hose and blow into the overflow for a few seconds. Then I just kick it with the throttle closed and it usually starts within a kick or two.
How to start a KTM 495 (http://www.youtube.com/watch?v=Gj4vaaZnQFk#ws)
#'s 1 & 3.....LMFAO :D :D :D Just like being in Amal country.
BTW braap, regardless of your conditions,if you can start without choke,you're too rich off the bottom for those conditions.
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#'s 1 & 3.....LMFAO :D :D :D Just like being in Amal country.
Which is right next to Bingland ;D
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Yup, they got Bing's prior to Bing having a choke (I do have Bing's with chokes :)
I've gotten the tickler to work but I don't know, I follow the same exact method and I get 1, 2 or 3, so unpredicible I gave up and usually 1 and 3 :)
Before the blowing in the carb method those bikes were impossible to start cold, had to either drift start or put gas in the cylinder if I couldn't get the tickler to start.
Then I saw this video, tried it and couldn't believe it but that it actually works without fear of flooding and works every time :)
How to start a 2 stroke Big Bore Motocross Bike (http://www.youtube.com/watch?v=FamfgXMW9Mc#)
He is even doing it on bikes with Chokes, but I never had a problem with a big bore with a choke, they usually start in a few kicks.
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My dad's '78 440 was always a bear to start. We had a hard time figuring it out because it ran so unbelievably perfect, but there's a new theory that I think should solve the problem. In all honesty I don't know enough about it to tell you what it is, something about the carburetor screws being set weird. But another interesting thing about the 440 is that it's got a Bing with a tickler AND a choke. And, believe it or not, dad prefers the tickler. I've never used one because my bikes have always had chokes (one of which puts the choke lever on the handlebars) so I really don't have much of an opinion on the wildly one-sided choke vs tickler debate.
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Those that can figure out the tickler say its better than the choke. My 83 has both, but I never touch the tickler.
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I have 2 bikes that do not have chokes, they have what you call a tickler. The tickler does one of three things.
1. Nothing
2. Primes the engine so it can start
3. Floods the engine
I have found that it's usually 1 & 3 for me, I've never mastered the art of cocegas.
So, for those bikes I have a most unusual starting method. I take a hose and blow into the overflow for a few seconds. Then I just kick it with the throttle closed and it usually starts within a kick or two.
How to start a KTM 495 (http://www.youtube.com/watch?v=Gj4vaaZnQFk#ws)
#'s 1 & 3.....LMFAO :D :D :D Just like being in Amal country.
BTW braap, regardless of your conditions,if you can start without choke,you're too rich off the bottom for those conditions.
What should I do then? I mean i didnt think any harm would come from being a little bit rich. Im not fouling plugs either.
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I have 2 bikes that do not have chokes, they have what you call a tickler. The tickler does one of three things.
1. Nothing
2. Primes the engine so it can start
3. Floods the engine
I have found that it's usually 1 & 3 for me, I've never mastered the art of cocegas.
So, for those bikes I have a most unusual starting method. I take a hose and blow into the overflow for a few seconds. Then I just kick it with the throttle closed and it usually starts within a kick or two.
How to start a KTM 495 (http://www.youtube.com/watch?v=Gj4vaaZnQFk#ws)
#'s 1 & 3.....LMFAO :D :D :D Just like being in Amal country.
BTW braap, regardless of your conditions,if you can start without choke,you're too rich off the bottom for those conditions.
What should I do then? I mean i didnt think any harm would come from being a little bit rich. Im not fouling plugs either.
If you don't have a plug issue you won't be doing any real harm other than the fact you're losing performance.
Try here.......
http://twostrokemotocross.com/forum/index.php?topic=619.0 (http://twostrokemotocross.com/forum/index.php?topic=619.0)