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FJR Motorcycle Forums
Technical & Mechanical Problems
What's that hose coming from the airbox
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<blockquote data-quote="Fred W" data-source="post: 1417867" data-attributes="member: 3828"><p>Crankcase vent is hose #27. It runs from the crankcase to a larger nipple up between throttle bore #2 and #3. Im pretty sure that the hose you are missing is a drain line for any moisture or oil that condenses and accumulates in the air box. Oil present on that nipple would be from blowby entering the box via hose 27.</p><p></p><p>By having the hose missing your airbox has also been allowing unfiltered air into the engine through that nipple. That is not a good thing. You are going to want to check your engines compression and/or leakdown to see how much damage was done. And replace the missing vent line components or at least install a length of tube with a plug in the end that you can open to drain any oil from occasionally. That is how some manufacturers design their air box drains.</p></blockquote><p></p>
[QUOTE="Fred W, post: 1417867, member: 3828"] Crankcase vent is hose #27. It runs from the crankcase to a larger nipple up between throttle bore #2 and #3. Im pretty sure that the hose you are missing is a drain line for any moisture or oil that condenses and accumulates in the air box. Oil present on that nipple would be from blowby entering the box via hose 27. By having the hose missing your airbox has also been allowing unfiltered air into the engine through that nipple. That is not a good thing. You are going to want to check your engines compression and/or leakdown to see how much damage was done. And replace the missing vent line components or at least install a length of tube with a plug in the end that you can open to drain any oil from occasionally. That is how some manufacturers design their air box drains. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
What's that hose coming from the airbox
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