Question about 2005 Suzuki Boulevard S50

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On S50 Suzuki Motocycle I have an oil drip from a rubber tube that looks like it comes from up near the air cleaner and exits below the bike. Any ideas before I start taking the seat, tank, etc. off?

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  • dcpalmer13 May 19, 2009

    Yes, I inspected the air filter housing and intake and there is no apparent obstruction. I posted some more info for this bike 2007 S50.
    The problem has gotten better as far as volume of oil (just spotty now), but it still concerns me. The first 800 miles or so there was no oil at all. Thanks



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  • Suzuki Master
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The air cleaner(filter) also filters crankcase blowby . Oil accumulates in filter box and drains. The draining is to prevent oil from being drawn into intake an should be addressed by servicing air filter and cleaning out the box. Rapid and excess oil in filter is a n indicator that blowby is considerable. Hardrabbit starts and sudden accelerations play a big part in ring wear and blowby. I've noticed the use of filter sponge placed, not stuffedm in crankcase vent hosebef ore filter housing will separate oil from fumes before they get to airfilter and oil will drain right back into engine instead of collecting in air box. Some crankcase vents are baffled and have a seperation medium factory installed at the enngine end if vent hose. Do not plug the drain or crankcase vent hose. major leaks will sevelope. Over reving will also cause greater oil misting that is carried out the vent with the air. Good luck - note! rapid throttling affects fuel burning eficciency and tends to break down needed cykinder wall lubtication, hastening ring wear. have fun, be safe.

Posted on May 10, 2009

  • Ned C Cook
    Ned C Cook May 11, 2009

    That didn't explain your problem? Hmmm. I didn't want to say it but make sure your air filter intake is clean and clear. If it can't get enough air it will pull it from the engine vent. Good Luck

  • Ned C Cook
    Ned C Cook May 19, 2009

    Poke some filter sponge in hole where the engine vent attaches to the air box about an inch in. The material will allow the crank to vent while seperating any oil mist. won't hurt a thing. It will just keep the oil out of the filter box. common practice for a common problem. rots a ruck



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2006 Suzuki DRZ400S oil leak from bottom of air cleaner.

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