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when i start my dirt bike it revs all the way
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vena
New User
| Posts: 1
| Joined: 09/08
Posted: 09/23/08 09:58 PM
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when i start my dirt bike it revs all the way. it is a yamaha 125cc does anybody know how to fix it is really annoying
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Posted: 09/23/08 10:05 PM
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are the cables dirty, you might need to adjust them as well
-------------------- HOT DAMN!!! Thats go riding
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Posted: 09/23/08 10:06 PM
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you got a manual?
-------------------- HOT DAMN!!! Thats go riding
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Posted: 09/23/08 10:17 PM
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i had this happen on a xr100 it turned out that there was a lil plattic piece thet got bent and was keeping the slide from dropping.. also this can happen if you leave the gas on it floods the carb and you need to clear it out by riding it
does the throttle feel sticky or like the slide in the carb is slicking open
=====================i eat the desert and the dessert
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Posted: 09/23/08 10:44 PM
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It sounds like it is a sticking float. Try taking the carb apart and cleaning it, while it is apart make sure the float arm is not bend and making the float hang by catching the side of the bowl. My bike did this for a while when I first got it from not being ridden. After a while it quit, once the gunk in the bowl was cleaned out.
Ride it like you stole it, because you might not be able to tommorrow 2004 KX125
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Posted: 09/23/08 10:48 PM
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i disagree with the sticking float problem DODGE a stuck float causes a carb to overflow not cause the bike to rev. its either a sticky slide a dirty/jacked cable or you just left the gas on
=====================i eat the desert and the dessert
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Posted: 09/23/08 10:49 PM
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there ya go.. i dont know anything yet about the carb. that is my next task though. now is the front end..
-------------------- HOT DAMN!!! Thats go riding
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Posted: 09/24/08 06:11 AM
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Is it sucking air through one of the gaskets. I think that will do it.
2007 300XC 2005 PW50(son's bike)
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92rm125
Addict
| Posts: 3801
| Joined: 03/08
Posted: 09/24/08 07:22 AM
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What gasket are you talking about Christie?
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pdk_6589
Enthusiast
| Posts: 398
| Joined: 03/08
Posted: 09/24/08 08:42 AM
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It will rev high if the crank seal on the flywheel side is leaking, if the intake has a leak anywhere between the carb and the cylinder it will rev high. If it only does it for a short time then it is probably cause excess fuel is settling in the crank somehow, usually from leaving the gas on.
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RM-rider20
Enthusiast
| Posts: 404
| Joined: 09/08
Posted: 09/25/08 05:32 PM
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i had the same problem on my RM125, especially when the choke was on, it would idle so high that it would die. turns out that my throttle cable was too tight and it wouldnt let the slide come down all the way. i adjusted it and it was fine.
-------------------------------------------------------------------------------- The only reason a four-stroke can beat a two-stroke is because of the double displacement advantage
1996 RM125
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zackn291
Enthusiast
| Posts: 327
| Joined: 05/08
Posted: 09/25/08 06:35 PM
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It could be as simple as the fuel screw, when I got my bike it was set so high that it would turn the wheel even if I wasn't on the gas.
--------------------------------------------------------------------- It takes a real man to say a 230 is a nice bike - Will12546
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Posted: 09/26/08 11:26 AM
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same thing happens with mine. I just turn the choke off as soon as I kick it
-------------------- 2004 Honda CRF250X
2003 Kawasaki KX100
2001 Honda XR100R
2004 KTM 125EXC
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Skipper
Addict
| Posts: 4029
| Joined: 01/08
Posted: 09/26/08 11:33 AM
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Ding, ding, ding!! We have a winner! I'm with Zack on this - adjust the mixture screw. My bikes do this every time the seasons change, and it's a simple matter of dialing the mixture screw in.
**
Here we go again!
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Posted: 09/26/08 04:25 PM
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I also noticed since it's been getting colder, when I first start my bikes I have to keep the choke on longer or it just boggs out
-------------------- 2004 Honda CRF250X
2003 Kawasaki KX100
2001 Honda XR100R
2004 KTM 125EXC
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