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bike smoking
https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=505
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Author:  Guest [ Thu Jan 13, 2005 1:47 pm ]
Post subject:  bike smoking

well guys i think something is wrong with my bike... when im in the corner and i pop the clutch in 1st gear the bike smokes really bad untill i let go of the throttle... but when i dont pop the clutch it doesnt smoke that bad.. i am running 40:1 ratio with yamalube and its mixed perfectly. i dont know wats wrong with it? is it the jetting or wat?

Author:  CR250Ryan [ Thu Jan 13, 2005 6:30 pm ]
Post subject: 

I usually use second gear coming out of corners, so you may be over revving it. Could also be a worn out top end...

Author:  GomerPile2525 [ Thu Jan 13, 2005 7:46 pm ]
Post subject: 

well i do use 2nd gear alot too but wat im trying to say is like a start at a race..u know how u pop the clutch.. it smokes badly

Author:  CR250Ryan [ Thu Jan 13, 2005 7:50 pm ]
Post subject: 

could be jetting, or worn carb parts. what bike are you talking about?

Author:  GomerPile2525 [ Fri Jan 14, 2005 10:18 am ]
Post subject: 

sorry the guest post is me.. its my 1979 cr125

Author:  CR250Ryan [ Fri Jan 14, 2005 11:34 am ]
Post subject: 

i suppose your idle circuit could be rich, since you experience the smoking when you take off real quick... maybe adjust the air screw.

Author:  gear lube [ Fri Jan 14, 2005 6:54 pm ]
Post subject: 

it needs new crank seals

Author:  GomerPile2525 [ Sat Jan 15, 2005 9:44 pm ]
Post subject: 

where can i get crank seals

Author:  Rick [ Fri Jan 28, 2005 9:26 am ]
Post subject: 

I agree. Right side crank seal. Replace both. You may have to split the cases to change the right side. :(
You can get these almost anywhere.
Try
http://elsinores.com/
or any seal shop or good bike shop.

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