05 Cr125r

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Beanjuise

Member

Dec 8, 2006

3

0

• Dec 8, 2006

• #1

05 Cr125r fouling plugs

I just got this bike about 6 months ago for my brother, but every time I take it out I foul out a plug in under an hour. The dealership told me to mix 50:1 and it will save my plug longer, but it doesn't work, I am always on the throttle and it stills dies, is there something I can do to extend the life of these plugs?

 

Last edited: Dec 8, 2006

R

Rideblue4ever

Member

Aug 28, 2006

65

0

• Dec 8, 2006

• #2

i wouldnt run 50:1 cuz with them telling you that it just means they want u back to buy a new top end soon. u should run 32:1 and adjust ur jetting in ur carb

 

B

Beanjuise

Member

Dec 8, 2006

3

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• Dec 8, 2006

• Thread starter
• #3

is it more of a trial and error thing with the jetting or is there a specific adjustment?

 

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Shad 250

Member

Mar 9, 2004

24

0

• Dec 8, 2006

• #4

Go down one size on your pilot jet. Leave your mixture at 32:1. Tell your dealer they are clueless.

 

kawicam250

I bleed green!

Member

Aug 7, 2006

1,162

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• Dec 8, 2006

• #5

Shad 250 said:

Go down one size on your pilot jet. Leave your mixture at 32:1. Tell your dealer they are clueless.

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i run 40:1 on my 125, and it runs very well. running 32:1 fills your bike with more oil than mixing at 40 or 50:1, which will make your bike more prone to fouling. jetting the bike is the best you can do for it right now. i had the same problem a year ago with my 125. i had to rebuild the top-end and rejet the bike, after that, the bike ran perfect.

 

S

Shad 250

Member

Mar 9, 2004

24

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• Dec 8, 2006

• #6

Yep, I always ran 40:1 when I had two strokes as well. All I was telling him was that it was the jetting, not the oil, that is fouling his plugs. 40:1 will work well too. Go down on that pilot jet and life will be good. :nod:

 

kawicam250

I bleed green!

Member

Aug 7, 2006

1,162

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• Dec 8, 2006

• #7

Shad 250 said:

Yep, I always ran 40:1 when I had two strokes as well. All I was telling him was that it was the jetting, not the oil, that is fouling his plugs. 40:1 will work well too. Go down on that pilot jet and life will be good. :nod:

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yep, the pilot jet( or sometimes called small or secondary jet), will help you out. it allows a certain amount of oil into your cylinder, dropping the size will allow less oil to get to your plug. i also messed with the air screw and the main jet, the air screw is very simple, just requires a screw driver. do that and the pilot jet first, that should fix it. also make sure to mix the proper oil in your gas. i run Maxima SuperM 2 smoke racing oil. almost all my oil ends up burned, not dripping out of my silencer ;) .

 

M

MXP1MP

Member

Nov 14, 2000

1,845

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• Dec 9, 2006

• #8

I have to double check my friend's '06 got like a one size leaner pilot I know the needle is leaner at least in the #2 clip position went up like one on the main size. It's still alittle rich mixed at 50:1 with 927! it doesn't foul out definetly not within an hour of ridding. Run on stock plugs also. Check the float hieght I think it could be off on some of the bikes. My friend is on his 3rd piston now and they look good at 50:1 definetly no abnormal or increased wear. easy 40 hrs on them.