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FJR Motorcycle Forums
Technical & Mechanical Problems
Guide to Removing the Air Induction System
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<blockquote data-quote="quicksilver" data-source="post: 444217" data-attributes="member: 375"><p>FYI,</p><p></p><p>I drilled the right side center of the box, to allow for some right side air intake.</p><p></p><p>I drilled dozens of holes with a small drill bit, which turned the panel into a screen that looks like a kitchen strainer.</p><p></p><p>(will keep out leafage, bugs and debris) (2.5mm bit?) (maybe 50% of plastic remaining?)</p><p></p><p>After rechecking the TBS, it didn't change at all. C1-C3 were "money" and C4 was just a wisker low, well within spec.</p><p></p><p>I barely breathed on the scew to make them all perfect. I've done sync's before where perfect was not even in the cards.</p><p></p><p>So, at idle, I'm saying zero affect on intake balance.</p><p></p><p>What's happening at full throttle may be a different story. I assume that is when she will be looking for more air.</p><p></p><p>I can definitely hear new sucking sounds.....</p><p></p><p>I wander if the shoehorn on the left side, which reaches into the filter should be trimmed some.</p><p></p><p>I assume that it is there to help balance the flow across the cylinders.</p><p></p><p>With new fresh air by C4, maybe that shoehorn should get 25% smaller?</p><p></p><p>Filter access sure would get much easier.</p><p></p><p>Anyone else think that filter cover can be a pain in the ass to remove and replace?</p><p></p><p>Summary:</p><p></p><p>I think I found that much more modest mods, do give much more modest results.</p><p></p><p>(not always the case in man's search for power)</p><p></p><p>WW reported that his radical mod demanded significant throttle syncing.</p><p></p><p>Where, my adding just a couple extra sq. inches of opening required none.</p><p></p><p>I think this means the added opening had no impact at idle and probably little impact under throttle.</p><p></p><p>Oh well. It was free.</p></blockquote><p></p>
[QUOTE="quicksilver, post: 444217, member: 375"] FYI, I drilled the right side center of the box, to allow for some right side air intake. I drilled dozens of holes with a small drill bit, which turned the panel into a screen that looks like a kitchen strainer. (will keep out leafage, bugs and debris) (2.5mm bit?) (maybe 50% of plastic remaining?) After rechecking the TBS, it didn't change at all. C1-C3 were "money" and C4 was just a wisker low, well within spec. I barely breathed on the scew to make them all perfect. I've done sync's before where perfect was not even in the cards. So, at idle, I'm saying zero affect on intake balance. What's happening at full throttle may be a different story. I assume that is when she will be looking for more air. I can definitely hear new sucking sounds..... I wander if the shoehorn on the left side, which reaches into the filter should be trimmed some. I assume that it is there to help balance the flow across the cylinders. With new fresh air by C4, maybe that shoehorn should get 25% smaller? Filter access sure would get much easier. Anyone else think that filter cover can be a pain in the ass to remove and replace? Summary: I think I found that much more modest mods, do give much more modest results. (not always the case in man's search for power) WW reported that his radical mod demanded significant throttle syncing. Where, my adding just a couple extra sq. inches of opening required none. I think this means the added opening had no impact at idle and probably little impact under throttle. Oh well. It was free. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Guide to Removing the Air Induction System
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