Balancing throttle bodies

Joined
Jun 26, 2015
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I have a 961 sport that I bought used with 500 miles on it. The left exhaust pipe is not nearly as oxidized as the right, and when I changed over to Iridium spark plugs I also noticed that the left plug looked a little rich and the right plug looked lean. Anyone know how to balance the throttle bodies if that is what would correct this? Thanks.
 
Further examination of the symptoms and general rough running had me check the dipstick. It was at the correct level, basically making the end of it wet. I pulled the air filter and sure enough, it's full of oil with @ 1/3 of a quart in the bottom of the airbox. The original hose was blocked with what looked like white grease, and of course plugged with the plastic screw {thank you U.S. EPA}
My solution for the problem was to try and kill two birds with one stone. I drilled and tapped the transmission filler plug for a 1/8 27 NPT fitting and drilled and tapped the airbox for the same fitting, then "teed" them together just under the air box at the original drain and run the rest of this clear hose out to the chain and secure it with a tie rap to the chain guard. If this prototype system works out I'll dress it up with proper AN fittings and braded hose for the proper "cafe" look.
After washing the air filter out, the bike runs much better. I hope this will explain the differences in plug/pipe color. My thinking is the left side was running rich because the bike rests on its left and the oil collects on the left side of the airbox and perhaps tends to oil the left/down side of the airfilter when the bike is on its side stand . Fingers crossed!
Thanks to everyone for the suggestions that led to this attempt
 
If I understood this correctly, you would be draining the air box oil into the transmission. Which would be very bad because when it rains or you wash the bike, water goes into the air filter and drains out that hose. So you will now be getting water into the transmission and over filling it with watery oil. if this is the case, remove that system immediately!

If I misunderstood, then please post a picture.
 
Hi Richard, I have a 1/4 brass hose barb tapped into the transmission filler plug. A 1/4 hose is attached to the hose barb and makes a fairly large loop up and over until it then routes down and is teed into the airbox drain directly below the original drain. Unless the fluids can flow upstream back over the loop, I don't think anything can drain back into the transmission. Seems to work so far, but thanks for the concern!
 
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