You should really use a wrench to tighten the 10mm nut on the rocker arm while at the same time holding your straight slot screwdriver from turning. The way your are doing it will cause the whole thing to turn as you are tightening it with the socket.
A man of few words, but outstanding video! I at least have a good idea how to do this now on my KLX125 (same bike). Basically, get the motor to top dead center-what you did on the bottom end, verify through spark plug hole, then adjust the valves to .003 thank you!
@@liamwilliams7782 I sure did! Turned out that bike had very worn valves and had to be completely replaced. Your video helped me get them adjusted, thank you!
@@stevezee5568 any chance you remember what you actually set the valves at mate as I have tried a fair few settings and all seem wrong pal im starting to think maybe my bikes the same but its fairly new so I can't see it being worn but I might be wrong
For all that watch this - valve play on original GN125 seems .10mm in .12mm out. On the Chinese copies it is .10mm in and out. Try to move the feeler gauge blade sideways under the set screw, don't try to poke it in between. It also takes a 10mm ring wrench for the counter nut and a flt blade screw driver for the set screw - without these simple tools this process turns into an nightmare.
Man I need to learn more about this to fix the bike I got the book too I got 8 bike I wan try to make my own shop to fix the bike don't get off ur dream keep ur dream bike everything it u can do every wat u can keep ur dream bike
Easiest way to fibd the compression stroke - put yoyr finger over the spark llug hole until you feel air blowing out, its trying to compress but because the spark isn't there it just blows out. Saves a lot of time.
Didn't show the timing marks, or describe them in the description. I believe the feeler gauge should be .003 and .005 right ? NEED to do, unless you have a video on the Cam Chain Adjuster...
You can download the service manual for free online and it has all the info in it. I did and I’ve just used that for all my maintenance on my 125 DR-Z’s. It goes pretty well in depth about valve adjustment and other things.
Its no really no help when youre not explaining what youre doing and why( lining up TDC on compression stroke, checking cam sprocket marks are level with cylinder head through the rubber gromet , ensuring both tappets are rocking with at least some clearance, making sure the engine is completely cold, luckily i understand what's happening, but to a novice its as much use as a chocolate teapot)
What year is the dry in this video? I have an 82 dr125 and the engine, etc. Look very similar. I need an after market muffler, as the exhaust bushing for the stock setup is not available.
He's spinning the engine by hand to find top dead center on the compression stroke. You'll see piston at top in spark plug hole, confirm with a pencil, top dead center stroke when it's blowing air out of the spark plug hole.
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this is the same engine as alot of uk supermoto import bikes /w sinnis&lexmoto, many thanks very helpful!
your welcome! glad to help!
You should really use a wrench to tighten the 10mm nut on the rocker arm while at the same time holding your straight slot screwdriver from turning. The way your are doing it will cause the whole thing to turn as you are tightening it with the socket.
A man of few words, but outstanding video! I at least have a good idea how to do this now on my KLX125 (same bike). Basically, get the motor to top dead center-what you did on the bottom end, verify through spark plug hole, then adjust the valves to .003 thank you!
Sorry mate I know I'm 2years to late but did you mange to work out its 00.3 in 00.6 out
@@liamwilliams7782 I sure did! Turned out that bike had very worn valves and had to be completely replaced. Your video helped me get them adjusted, thank you!
@@stevezee5568 any chance you remember what you actually set the valves at mate as I have tried a fair few settings and all seem wrong pal im starting to think maybe my bikes the same but its fairly new so I can't see it being worn but I might be wrong
The Same Motor like on a 1991 Suzuki Dr 125 se. Very helpful!
For all that watch this - valve play on original GN125 seems .10mm in .12mm out. On the Chinese copies it is .10mm in and out.
Try to move the feeler gauge blade sideways under the set screw, don't try to poke it in between.
It also takes a 10mm ring wrench for the counter nut and a flt blade screw driver for the set screw - without these simple tools this process turns into an nightmare.
Man I need to learn more about this to fix the bike I got the book too I got 8 bike I wan try to make my own shop to fix the bike don't get off ur dream keep ur dream bike everything it u can do every wat u can keep ur dream bike
Easiest way to fibd the compression stroke - put yoyr finger over the spark llug hole until you feel air blowing out, its trying to compress but because the spark isn't there it just blows out. Saves a lot of time.
BEFORE DOING THIS make sure the valves have a little play in them before loosening/tightening them
Didn't show the timing marks, or describe them in the description.
I believe the feeler gauge should be .003 and .005 right ?
NEED to do, unless you have a video on the Cam Chain Adjuster...
You can download the service manual for free online and it has all the info in it. I did and I’ve just used that for all my maintenance on my 125 DR-Z’s. It goes pretty well in depth about valve adjustment and other things.
Is one side .005 and one side.003?
Nice that your hand was in the way during the one part I was trying to see where you actually stick the feeler gauge....
Its no really no help when youre not explaining what youre doing and why( lining up TDC on compression stroke, checking cam sprocket marks are level with cylinder head through the rubber gromet , ensuring both tappets are rocking with at least some clearance, making sure the engine is completely cold, luckily i understand what's happening, but to a novice its as much use as a chocolate teapot)
Great video, what year is your DRZ125?
2003
@@DK-RVA what value of the valve adjustment? I'm French and I never see this video ajustement in french for my 125 drz.
@@tonyboy9651 if you never got it it's .08-.13mm intake and .13-.18mm exhaust side 2005 klx125 which is the same bike
Are the two sides different one .003 and one .005???
Yup. He did .003 on thr intake and 006 on exhaust
What year is the dry in this video? I have an 82 dr125 and the engine, etc. Look very similar. I need an after market muffler, as the exhaust bushing for the stock setup is not available.
2007
How many milimeters to adjust intake and exhaust
Avi Jinx right he helps nothing
What is your intake and exshaust measure i have a gs 125 same engine as that
Did u ever find out, are the both the same?
@@gavinhays7952 yes its the same engine in our country this motorcycle is called suzuki GS 125
I meant the measurements for each do you know what they are? Sorry for the confusement
@@gavinhays7952 yes 0.4 on intake 13 on my exshaust thats my bike wanted
.13 or .013?
What am I looking for in that hole
can you tell us what mark you're looking for in the 'inspection hole' thanks, cool vid
Top dead center mark
He's spinning the engine by hand to find top dead center on the compression stroke. You'll see piston at top in spark plug hole, confirm with a pencil, top dead center stroke when it's blowing air out of the spark plug hole.
Gosh what a totally useless video!