Question about 2005 Yamaha XT 125 R
I have a yamaha xt 125 r and every time i am flat out the revs die the throttle goes and it just stals can anyone help me please iv checked the carb(cleaned it out checked the needle and float)iv checked all wires taped them up just in case and took top of the air fillter and put fine mesh on top bike runs much faster cause more air but it still does it(the mesh is very fine no bits can get through).
Hi, Broozer123 and the usual suspects are:
1. Inlet system air leak.
2. Enrichener valve not seated or leaking.
3. Damaged or restricted fuel tank vent system.
4. Restricted fuel supply tract.
5. Dirty or damaged air cleaner element.
6. Plugged bowl vent or overflow.
7. Worn or damaged needle or needle jet.
8. Vacuum piston assembly malfunction.
9. Loose or plugged main jets or passages.
10. Improper float level.
11. Accelerator pumps inoperative.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Carburator Theory and Tuning
Yamaha XT 125R 2005 Service Information
OEM parts for Yamaha
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Posted on Jun 05, 2017
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Posted on Jan 02, 2017
If it died over a bump, the problem is almost certainly electrical. Check that all the fuses are firmly in place in the fusebox (while you're in there, clean off any corrosion you notice). Have a careful look at the cable that grounds the battery to the frame-- take the bolt off, clean off corrosion (steel wool or fine sandpaper). Try shorting out the contacts from the ignition lock -- maybe one of those wries snapped or came adrift. If it starts or the lights come on, there's your problem. Does this model have a killswitch that could have been bunmped to the "off" position?
Posted on Jun 04, 2009
SOURCE: yamaha ybr 125 top speed
Not much to start with here unfortunatly mate. A free flow muffler will help top end speed, change the factory airbox to a K&N style pod air filter, other than that, hugging the tank at top speed :) If you do change these parts, you may also need to increase the main jet size to richen up the mixture for better tuning of the motor with the better flowing parts. This bike has a top speed of 100kmp and produces 10 hp, so you may only expect to get at best less than 1 extra neddy, and perhaps another 5 km/hr.... I suggest upgrading to a bigger machine of you feel the need for speed :)
If its 125's you are into, test drive a Honda CBR 125R 6 speed fuel injected 13.4 horsepower, and good for 120km/hr
Posted on Jul 10, 2009
Sounds like a fueling problem either water in the carbs or the fuel flow from the tap is insufficient. If there is a vacuum pipe it may have been dislodged or holed.
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Posted on Aug 03, 2009
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