abusive throttle cranker Posted March 21, 2013 Share #1 Posted March 21, 2013 I want to consult the experts......I have purchased a new K&N air filter and I find some mods have been done to my air box. The square internal piece which screws in with sheet metal screws(screws into the divider panel-the one between the upper and lower halves) and fits inside the filter is missing. Also two half inch diameter holes have been drilled into the box on each side. They are above the divider into the filter side of the box. Another thing- the new air filter does not allow the lid to settle down completely into the groove around the circumference. Yes- I have made sure is is seated correctly inside the tabs. I almost fits- but is maybe 3/16ths apart at rest. I imagine that tightening the screws will draw it down some. Can I just go with this setup as it is? Link to comment Share on other sites More sharing options...
dingy Posted March 21, 2013 Share #2 Posted March 21, 2013 I want to consult the experts......I have purchased a new K&N air filter and I find some mods have been done to my air box. The square internal piece which screws in with sheet metal screws(screws into the divider panel-the one between the upper and lower halves) and fits inside the filter is missing. Also two half inch diameter holes have been drilled into the box on each side. They are above the divider into the filter side of the box. Another thing- the new air filter does not allow the lid to settle down completely into the groove around the circumference. Yes- I have made sure is is seated correctly inside the tabs. I almost fits- but is maybe 3/16ths apart at rest. I imagine that tightening the screws will draw it down some. Can I just go with this setup as it is? Not the answer you want to hear, but no. The bike is very finicky about changes to the air box. I have experimented with my 83 before it went VMax, and it did not react well, especially in the mid range, with even two 1" diameter extra holes. I have a spare complete air box. You can have it for shipping costs. Gary Link to comment Share on other sites More sharing options...
Rick Butler Posted March 21, 2013 Share #3 Posted March 21, 2013 Larry, You are good to go. 2 - 1/2" holes should not be an issue as I ran 4 - 1/2" holes in my lid without any problems with stock carbs. But if you get a stumble coming off idle, put a piece of duct tape over one or both. And with that inner dam removed, it just allows all air coming through the filter to go straight into the carb throats, rather than making it go up and over creating a disturbance. But unless the lid or box is warped the lid should fit down into the groves even with the K&N. Hope this helps, Rick I want to consult the experts......I have purchased a new K&N air filter and I find some mods have been done to my air box. The square internal piece which screws in with sheet metal screws(screws into the divider panel-the one between the upper and lower halves) and fits inside the filter is missing. Also two half inch diameter holes have been drilled into the box on each side. They are above the divider into the filter side of the box. Another thing- the new air filter does not allow the lid to settle down completely into the groove around the circumference. Yes- I have made sure is is seated correctly inside the tabs. I almost fits- but is maybe 3/16ths apart at rest. I imagine that tightening the screws will draw it down some. Can I just go with this setup as it is? Link to comment Share on other sites More sharing options...
abusive throttle cranker Posted March 21, 2013 Author Share #4 Posted March 21, 2013 There are 2x half inch holes ON EACH SIDE. I figure to try it this way. I can probable plug one or all the holes if necessary. As long as its not a major problem right off the bat....... Of course I'm not familiar with the bike so won't know if its 100% or just 90%. Link to comment Share on other sites More sharing options...
reddevilmedic Posted March 21, 2013 Share #5 Posted March 21, 2013 put a fresh set of plugs, make sure its not too lean. white plugs, otherwise you may have to shim the needles...i'm using k&n and have to screw it down tight Link to comment Share on other sites More sharing options...
ACE50 Posted March 21, 2013 Share #6 Posted March 21, 2013 You've added a K&N to get more air in, right? Openig the air box can help too, but it might require some carb changes. Mine's a 2nd gen, but opening the air box inlet hole by 50% (with K&N's) with one size larger slow jets made a noticable improvement in performance. Link to comment Share on other sites More sharing options...
abusive throttle cranker Posted March 21, 2013 Author Share #7 Posted March 21, 2013 I needed a new air filter and the K&N was available and has a good rep. I'm not all that interested in making it faster. BTW no oil was included with the filter. Is that a problem? The plugs I removed are good but slightly carboned so its a touch to the rich side. Another reason for the K&N- will lean it out some. Link to comment Share on other sites More sharing options...
ACE50 Posted March 21, 2013 Share #8 Posted March 21, 2013 If they are red, there is oil on them. Link to comment Share on other sites More sharing options...
ragtop69gs Posted March 21, 2013 Share #9 Posted March 21, 2013 You MUST oil the K&N filters, they will not do their job if you don't. The dirtier they get (to a point) the better they filter. Link to comment Share on other sites More sharing options...
ACE50 Posted March 21, 2013 Share #10 Posted March 21, 2013 I've never seen a new K&N that wasn't oiled. (red) A clean/unoiled K&N is gray. Link to comment Share on other sites More sharing options...
abusive throttle cranker Posted March 21, 2013 Author Share #11 Posted March 21, 2013 OIC.......there was no oil in the package. But the filter element is red so its all good. Link to comment Share on other sites More sharing options...
reddevilmedic Posted March 21, 2013 Share #12 Posted March 21, 2013 i use No- Toil cleaner and PJ 1 spray. the No Toil works awesome! use it on my cr500 Link to comment Share on other sites More sharing options...
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