Question about 2003 Yamaha YZ 125

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My 2003 yz 125 hesitates when you give it gas.It does it every time you switch gears.You have to give alot of gas to straighten it out.

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It is one of a few things causing it to flail in the lower end, 1: your fuel oil mixture isnt lean enough.. 2: you need a higher spaking plug.. 3: your carburetor float level is out or 4: there is a slight break in the ignition spak line which would cause it to spark very weak until maximum accelleration is reached

Posted on Jun 12, 2009

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Posted on Jan 02, 2017

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1 Answer

1976 yamaha yz 125 not shifting properly.not staying in gear


If it does stay in gear when barely throttled but does not stay in while under load, the engagement dogs on the gears(inside the engine) are bad and the engine will need to come apart to repair it.

Nov 17, 2014 | 2003 Yamaha YZ 125

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Can a 2003 yz 125 throttle cable fit on a 2010 yz 85


From my understanding the cable on the 125 is alot longer and where it connects to the carb. Its a different size.

Aug 29, 2014 | Motorcycles

1 Answer

I have a 2000 yz125 and when I shift into 3rd gear and give it gas it kicks it back down to 2nd gear. sometimes I cant get it to shift into 2nd gear. any ideas? thanks


I am presuming you are giving the gear lever a positive shifting motion when changing gears.
If the gear lever is completely tight on the gear shift shaft and the toe of the lever does not touch the engine sidecover when changing up, you may have a worn roller shift lever or loose screws holding this mechanism in place. See the exploded view diagrams of the SHIFT CAM and SHIFT FORK with all part names and numbers on the link below.
Cheers!

http://www.cmsnl.com/yamaha-yz125m1-2000_model10887/partslist/

Mar 04, 2011 | 2003 Yamaha YZ 125

2 Answers

I have 2003 yz 125 it runs teriffic and shift's grate 1-5 but it wont go in to 6st gear . any ideas


Well - you will first have to buy an earlier model to get into 6th gear. The 2003 YZ 125 is a 5 speed transmission. There's nothing wrong with your bike.

Feb 17, 2011 | 2003 Yamaha YZ 125

1 Answer

Reccommended gear oil for 2003 Yamaha YZ-125


85\90 transmission oil such as bel ray, motul or yamalube

May 26, 2010 | 2003 Yamaha YZ 125

1 Answer

Sometimes it goses backwards


If this problem only happens after starting the bike it will be your timing.

Check that your pickup coil is aligned correctly aprox 2mm BTDC and that the pick up wires are the correct way around.

If the timing is after TDC it can start the motor in reverse when kicking it over.

Sep 13, 2009 | 2003 Yamaha YZ 125

1 Answer

Gear grinding in first gear withoutany visible damage 1992 yamaha yz 125


look to see if the clutch is burned out thats what happened to my ttr 125 and we change the clutch and it was fine then hope this helps

Sep 07, 2009 | 2003 Yamaha YZ 125

1 Answer

I have a 2003 yamaha ttr 125. At times it acts like it isn't taking gas and five minutes laterit is running fine. Sometimes it will even stall out on me.


3 things,

carb check
float bowl check
and clutch check.

these, if not set right will give out what you are experiencing.

you may refer to the manual on the default / recommended settings depending on the type of gas you are using.

regards, safe trails.

Jun 30, 2009 | 2003 Yamaha YZ 125

1 Answer

Will main clutch casing fit yz 125 2001 from 1997?


Hey Ryan! Long time since hearing from you.

When you say "main clutch casing" do you mean the right side cover for the gearbox or do you mean the primary driven gear (AKA "clutch basket") that the clutch boss (AKA "clutch hub") and all the clutch plates fit into?

If you mean the right outer casing > they are slightly different, '97 pn 4JY-15431-10-00 and 2001 pn 4JY-15431-12-00. The entire clutch is the same from 1997 through 2001.

Jun 07, 2009 | 2003 Yamaha YZ 125

1 Answer

2003 YZ 125 RUNS AND ONLY STAYS IN FIRST GEAR


This is a shift fork or shift drum issue inside the transmission.


please rate this solution

Feb 21, 2009 | 2003 Yamaha YZ 125

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