Originally Posted by cynicwanderer
mine runs better when B is covered with a plug. it's a vacuum port used to go to the big evap. can on my CA legal '85. there is a vacuum controlled valve in the can that is activated when the motor runs. it effects the mixture when you don't have anything connected to it and will drive you crazy.
Are you running "A" open, uncapped?
Current Bikes: 2006 KTM 950 ADV S, 2002 XR650L, 1988 Hondasuki KLNX250R
Previous Bikes: 1986 Honda XL600R
,Honda XL250R (2 of them), Honda XL600R, Kawasaki KLR600, Honda Nighthawk, BMW K1100LT, BMW R100GS, BMW R60/6, BMW K75, Husqvarna 430XC
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