Question about Yamaha YZ 125 Motorcycles

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My 92 yz125 keeps dying out the second i hit dirt but its perfectly fine on street fully pinned and i cant figure out whats causing it

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Check that the connectors on the coil are tight, and that the spark plug boot wiring is solid, souds like a loose connection that rattles with vibration.

Posted on Aug 23, 2010


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My yz125 starts after awhile but when i let the choke off it dies

Starting with the basics.Turn off the fuel.Remove the plug from the bottom of the carby float bowl.(17mm I think)Catch the fuel if you can in a glass to check for dirt and or water.Turn on the fuel tap and let some fuel run through and out the bottom af the carb.Turn the fuel back off.Replace the plug and turn the fuel back on.Sometimes just some **** in the floatbowl can cause problems.Start the bike and warm it up.In neutral give the bike full throttle and at the same time,flick the choke fully on and fully off a few times.The sudden on and off 'sucking'through the carby MAY dislodge a small piece of debris in a jet.Next.Check for water in the fuel.Do these steps before you pull stuff apart.It only takes about 10 mins.If these dont work its a good chance the carb has a bit more dirt in it that needs to be cleaned out.This is a guide as a starting point.Hope this helps

Aug 01, 2009 | 2003 Yamaha YZ 125

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