Dirty filter/intake, bronze plugs?

[Moespeeds]

A buddy was complaining about some clear oily residue on the right side of his '06 K9, seemingly coming from the carb. When he took of his air cleaner, the filter was very dirty and the intake was black. When he pulled the plugs, front and rear were nice and bronze. Bike has only 3300 miles, stock intake and V&H Big Radius with Baffles. He's fairly sure they used the V&H jets when they put the pipes on. What do you guys think?

 

[05chop]

Black like in carbon?

 

[Mach_1]

A buddy was complaining about some clear oily residue on the right side of his '06 K9, seemingly coming from the carb. When he took of his air cleaner, the filter was very dirty and the intake was black. When he pulled the plugs, front and rear were nice and bronze. Bike has only 3300 miles, stock intake and V&H Big Radius with Baffles. He's fairly sure they used the V&H jets when they put the pipes on. What do you guys think?

Clear oily residue?? maybe air filter oil?

 

[Moespeeds]

He says the residue is not like a dust, it's more oily. Think they just over oiled his filter and its cooking in the intake? He doesn't remember any coughing out of the carb while riding.

 

[Raywood]

He says the residue is not like a dust, it's more oily. Think they just over oiled his filter and its cooking in the intake? He doesn't remember any coughing out of the carb while riding.

Sounds like he may be venting a little too much out of his breather hose. Can he determine if the fitting on the backing plate has excess oil in it?
Motor will normally suck down excess oil out of the filter pretty fast in my experience unless it was just done and has been sitting then it would drain down and leak in as described!

 

[lee]

I'm with Ray - I'd be very surprised if it was filter oil. Has he looked at the colour on the inside of his exhaust? It might also be a touch lean and maybe had a cough or two - are the plugs shiney and baked? never heard the term bronze used in that way before.

 

[Moespeeds]

He says plugs look good, clean and light brown. I told him to check his oil level in case he filled it past the vent line and he's building up crank pressure, but haven't heard back. Coughing out the carb usually means rich, not lean, correct? He claims there is no coughing while riding.

 

[ZZ CHOP]

Moe coughing out of the carb it would be lean not rich, for example if the accelerator pump isn't working correctly and not shooting enough fuel while giving the throttle a quick blip, the engine will cough,sneeze,spit, sputter ect ect, its because the throttle blade is opened so fast their isn't enough fuel to accommodate the amount of air entering the combustion chambers, also to small of jets will run lean, I would bet that you have used a acetylene torch ya know when ya turn the oxygen down to low it will pop= to lean, to rich it will smoke like a MF, hope this helps the rich/lean I know it gets confusing sometime..Dave.

 

[Gas Man]

Simply said
http://www.bigdogbiker.com/forums/how/4943-how-adjust-your-carb-check-jetting.html

 

[BigDogBro1]

Don't have enough info yet, but here's some feedback.

If it's the original BDM dry air filter element, it sounds like an upper-end engine breather venting issue. With only 3300 miles on it and probably the original air filter element, it could be the caused by the engine break-in period blow-by from the piston rings.

Could possibly be an oil filter with low flow element causing too much oil in sump and creating vent mist from crank splash.

 

[Daddycool]

Make sure he isn't running a twin cam oil filter. That would make it do that for sure. Evo style!

 

[BWG56]

Maybe too much oil in the oil tank, it will push oil out at the air filter. Seen it happen on 2 BD,s last summer.

 

[BigDogBro1]

Make sure he isn't running a twin cam oil filter. That would make it do that for sure. Evo style!

You're correct Daddycool-

I think a twin cam oil filter will choke off the lower pressure return feed to the oil tank on an Evo type engine. The Evo engine oil return pump pressure is lower than a twin cam and with an oil filter having smaller than 20 micron filtering will cause return oil restriction causing the sump to back-up and crank splash.

 

[lee]

yes but doesn't the SSW+ have a TC style oiling system?