YZ125 power/powerband**

On my yz125 my dad thinks my clutch needs alot of work because he said if im just start off (in first gear) with the clutch all the way out and goin slow(2-3 MPH) and you just WOT throttle it"ll just blast away even when the rpms are really really low. Is this true?I tried to tell him if you just blip the throttle its fine but hes just cruisin' really slow and WOT'n the thorttle exspecting it to blast away. Arent you suppose to keep ur rpms up and your clutch?Or is there something seriously wrong with my bike. He said its not "engaging" in gear and i know for a fact that im in gear because i am moving!, It only takes like 1 second to hit the power band and take off. So whuts up with this thing???

Yes, your supposed to keep your rpms up. The power on this bike is high in the rpm range, not at the bottom. It's really hard to tell whats going on from your description though. :thumbsup:

Your clutch is fine, 125s dont blast off like 250s, you need to WOT then feather the clutch. If your bike is powerful in the high rpms (where its supposed to be ridden) then the clutch is fine.

it doesnt go as fast as does down low than it does topend wise, I think my dad just gets confused by the powerband of a 2-stroke andi s use to a four stroke

well then nothing wrong with my bike then!yay!!

its a 2 stroke, yes you need to be in the powerban for the power to come on. It dosnt have torque like a 4 stroke. you need to fan the clutch out of corners and such.

if u dump the clutch while in the powerban, does it engage instantly when you let the clutch out, or does it kind of delay and slowly come in? When i say slowly, i mean just a second or so. The bike's power should come in instantly when letting the clutch out.(while in the powerban) i should write a disclaimer lol, make sure your holding on and over the tank when you dump it. :thumbsup:

yeah, your bike is fine. If you put around then Pin it, it's gonna take a second for the powerband to kick in... when it doens hang on. it goes like this: burrrrAAAAAAAAAAAAAAAAAAAAANNNG

4 strokes go. braaaaaaaaaaaaaaaaaaap

That would really depend on which color powerband he is using! :thumbsup:

Yeah you just gotta be a little more careful when taking out on a 2 stroke as in feather the clutch more then you will be fine from there.

while im in the powerband and i pull in the clutch and dump it, its still in the powerband, yes

also could i get a different(smaller or larger) pilot jet to help this out any??

It really depends on what the problem is. If it is a bog when you open the throttle, then yes, changing the jetting will help. However, there is always going to be that time when the engine has to build revs to get into the powerband.

well i just took out my old spark plug and it was dead black. But i just bought it and i dont know how the guy ran it so im goin to put fresh premix and and new spark plug in soon and then see what color it is.

Move your clip up one position before you mess with any jets, it might solve the problme right there. The Needle controls the whole range. Turn your air screw out 1/4 turn also.

As for colored powerbands...

I just happen to have a few with n style graphics kits, pm me. lol

sorry to ask a dumb question, but what is a colored poweband??

sell your bike now. lol

uhh whyy?

well you asked a dumb question you got a dumb answer thats for sure :thumbsup:

okay whatever

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By faizakhtar125
      Hey guys I just bought a bike last night. So the seller said the bike will turn on but then die. We didn't try it because it was really late at night and it was raining (seat was wet). But he said if you bump start it, it will turn on and ride. So what do you think the problem is? I just want to make sure it runs... I probably won't be able to bump start it till Saturday (rain)... It's a four stroke, and I know absolutely nothing about them. Thanks.
    • By neonmarine
      Hey guys, 
      I've used this forum as a "guest" for awhile now and I thought I'd share my build now that it's all coming together.  The primary purpose of this project is to help me train for roadracing my 2009 R1 at lower speeds as well as giving me a cheap alternative to racing the big bike. 
      Here's what she looked like when I picked it up from a local shop.  Paid $800 cash for the bike as you see it with 17' rims, FMF pipe, EBC 250mm front rotor and clip on handle bars.

      Fits PERFECT!

      Shake down run at the Herrin Compound last summer:

      As she sits today:

    • By 125 yamaha guy
      i bought my yz125 from a dealer and they said that the clutch was broken so i bought it and it worked fine it would run move and everything and then it started to act up and now only first gear works barely though. when you put it in first it acts like its bogging down but its not and when you go into gears 2-5 it wont move i dont know whats wrong with it im assuming the clutch is slipping or something if you know please leave me a comment 
    • By Randomneewb
      Hey guys, I have a 2003 cr125 I bought a couple weeks ago and I'm having a problem with it. The spark plugs die every about 15 minutes, with hotter plugs it will last about 45 minutes. I herd that if the timing is off it can over heat the plugs and burn out the the resistor. Is there any truth to that? The reason I thinks it's not fouling is because when the plug dies it gives no spark no matter how much you clean it, And it shorts out.