Question about 2000 Yamaha TW 125

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My bike runs but after it warms up it looses power

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Have the shop do a compression check. Chances are the valve faces are carboned up and/or burned. it is likely the valves just need to be re-seated using valve grinding compound. Th cylinder head gets removed for access to the valves.

Posted on Jul 06, 2010

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My low beam will not come on when i first start the bike .


I think you have a loose or dirty battery terminal.

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Bike cuts out at running temperature


You actually may have two problems. First, if you have a spark from a coil, find out why. May be a bad or loose connection. when coils get hot their resistance increases. A leak or bad connection will show up quicker when hot. If the spark comes from the body of the coil, replace it.
Second, your starter may be breaking down when hot. Check the brushes and coils in the starter motor. The same discussion about loose connections also will apply to the starter.
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Apr 08, 2014 | Honda Varadero 125 Motorcycles

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Bike shuts off enxpectedly


Just a guess, have you checked the ignition coils? One may have a crack in the wound wire. When it warms it opens then closes when it cools down. There are a number of things that can cause your problem, but I would start with the ignition system.

Feb 14, 2014 | Harley Davidson FLSTC Heritage Softail...

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I have a 1986 yamaha virago 700 that wont run properly


2 things need to be done first start your bike get a can of wd40 after your bike is warm and running spray around the carb jointsall 4 of them if your engine changes rpms up or down you have a intake leak ether your carb joint gaskets or o-rings need replacing or your carb joints are old and need replacing. at this point wont hurt to have you carbs cleaned also

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1 Answer

Runs fine until bike warms up then misses


your cdi unit is suffering a from power surge try to check the output power if it is stable.

Apr 16, 2009 | 1995 Yamaha FZX 250 Zeal

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Trouble starting on warm starts sometimes.


This really sounds like a need to replace the intake gaskets. When the bike warms up the gaskets loose their seal leading to a lean condition that makes it almost impossible to start, until bike cools down. Gaskets are cheap, this would be my first place to begin. Hope this helps.

JP

Feb 21, 2009 | 2000 Harley Davidson FXDWG Dyna Wide Glide

1 Answer

COLD MORNING


no doubt this bike is running very lean at idle. Thats the way the EPA wants it. Im a harley mechanic and i used to work in a US dealer. all carb bikes at set up time had the carbs "readjusted". We drilled out the EPA plug and turned the idle air screw out and drilled out the pilot jet too. The bikes worked much better. we were at sea level too so the bikes were very lean from the factory. I can imagine that after the new legislation that came into force they are even leaner and require a full warm up to run properly. Warmed up means you put your hand on the motors head and its hot enought to have to jerk it away. this could take more than a couple minutes. and yes our "readjustment" was illegal. i advice you to do the same.

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1 Answer

Looses power when gets warm


then you need to check your timing

Nov 11, 2008 | 1989 Ford Bronco

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