Why is my idle so hard to adjust? (Fixed)

therealVB99
Profile picture for user therealVB99
Posts
106
Joined
5/9/2014
Location
Jacksonville, FL US
therealVB99
Edited Date/Time 1/23/2016 6:27am
Hey guys just rebuilt a 97 yz 125. Had the motor rebuilt and just about everything else on it. It's runs pretty good. But I can't figure the idle out. Do you adjust idle when the bike is cold or warm? Because if I do it when it is warm when the bike cools down , and I start it , it revs at high rpms. Is it a jetting issue? Pro circuit recommends a 45 pilot and the one in it now is a 50... It also seems to bog heavily when shifting into first and trying to go from a dead stop. If it's just a 125 thing, excuse my ignorance. My first bike was a cr250 and Ive only ridden big bikes since. I thought I would work on "the basics" with buying a 125.

Story over,

Any knowledge is appreciated.
|
Paw Paw 271
Profile picture for user Paw Paw 271
Posts
3640
Joined
4/3/2013
Location
Benton, LA US
Paw Paw 271 1/13/2016 12:49pm
1/13/2016 12:49pm
Check for intake air leaks...and yes, 125's are a bit gutless at low rpm's.
What does the spark plug tip color look like? Brown, Grey, Black or White?

Paw Paw
davidgrip
Profile picture for user davidgrip
Posts
273
Joined
10/7/2011
Location
Indianapolis, IN US
davidgrip 1/13/2016 2:56pm
1/13/2016 2:56pm
I adjust my 04 KX125 when the motor is warm. I used Pro Circuit for my jetting, and it runs great. Why, if they recommend a 45 pilot, did you use a 50 pilot? 125-Pin IT!

David
therealVB99
Profile picture for user therealVB99
Posts
106
Joined
5/9/2014
Location
Jacksonville, FL US
therealVB99 1/23/2016 6:27am
1/23/2016 6:27am
Paw Paw 271 wrote:
Check for intake air leaks...and yes, 125's are a bit gutless at low rpm's. What does the spark plug tip color look like? Brown, Grey, Black...
Check for intake air leaks...and yes, 125's are a bit gutless at low rpm's.
What does the spark plug tip color look like? Brown, Grey, Black or White?

Paw Paw
Turns out paw paw it was a small air leak. I may have reused an old intake gasket(from the reeds to the cylinder) ... I replaced it, and it's been running like a brand new bike. Thank your for your reply.

Post a reply to: Why is my idle so hard to adjust? (Fixed)