Kyle, I guess this is already been covered - you are reinstalling the cover and snorkel on the filter right?
On Sep 9, 2009, at 9:20 PM, Kyle Munz wrote: > I finally got back to my yogurt cup tuning. I cut it down so that > the large diameter of the yogurt cup was the same as the inside > small diameter of the K&N cone. Now it sits on the bottom of the > cone snug against the pleats and is about 3" below the opening of > the cone. This really didn't make much difference though with the > lean popping behavior. Slightly worse than it was with the full > size cup, not quite as bad as just the straight K&N. So, since I > want the K&N to work, I guess this leaves the carbs. Before > checking the jet size, I'm wondering if it would be worth it to try > quarter or eighth turn adjustments to these? The PO said they were > rebuilt carbs so it's possible those aren't set right, especially > since the limiter caps are all removed. My buddy has the tiny > carburetor drill bits for checking the jet sizes. I'll see if I > can't borrow those off of him. > > Pictures of the trimmed cup and mp3 of both the OEM airfilter and > the K&N are on my blog. http://munz.kicks-ass.net/nighthawk/?p=295 > > -Kyle > -Sent from Houston, TX, United States > > > On Fri, Sep 4, 2009 at 10:49 PM, Dennis Hammerl > <[email protected]> wrote: > That's the largest cup I've seen so far in one of those. !! Mine > is about 2/3 that size and truncated. Now, you have to admit it > works. The remaining issue is still to be addressed. Get a small > (stubby) Phillips screw driver and remove one of the outer float > bowls (carbs on bike) and check the main jet size. Actually check > the slow jet size too. The OEM is #115 and #35. What you are > describing is happening during "transition" (from all jets as a > collective to main) As the revs climb above the trouble zone and > the air speed (that's what this is all about, remember?) increases > enough to atomize a lot of fuel, it goes good. I'm not there and > have no crystal ball, this is my best guess at this point. You have > increased air speed a ton and it does run better. Now you have to > dig in. Even if the jet sizes are correct, there is no reason to > believe it. That's where sized wires come in. I can supply you with > the the wire sizes (and wires) to check that they have / have not > been reamed to some new size. your bike has been altered which you > cannot deny. Does it go deeper ? Let's see. When you get it right, > that gonzo cup might have to be replaced with a smaller one. From > what you say, you've made great progress with your problem. The > last little bit always takes the most work. You're gonna' get it > right. Hang in there. > > Just a note, yogurt cups are for California models. 49 state models > use soft drink cups. > > --- On Fri, 9/4/09, Kyle Munz <[email protected]> wrote: > > From: Kyle Munz <[email protected]> > Subject: [Nighthawk Lovers] K&N filter saga continues. > To: [email protected] > Date: Friday, September 4, 2009, 10:41 PM > > > Ok, Per Dennis' advice I reduced the interior volume of my cone- > shaped K&N filter, and that definitely improved things but it's not > quite perfect. > I couldn't locate a dixie cup (when you need one they're nowhere > around) so I went with an empty yogurt cup. Sorry, I don't know > what flavor. Anyhow, this took the bike from popping constantly and > barely climbing above 4grand to a bike that will actually start, > idle, and rev. > It still is off just a tad. The exhaust sounds a bit more "hollow" > that it did before. Can't describe it better than that. > I've recorded an audio file of the exhaust popping and posted it on > my blog at http://munz.kicks-ass.net/nighthawk/?p=280 for anyone > interested. It starts at 2K, moves up the 3K, then to 4K where it > starts to pop a bit, and then starts to pop alot as I move up to > 5K. After 5K it takes off like a champ and definitely has more > power in the higher revs than it did before, but I want the lower > RPM rideability I hear so much about ;) The end of the audio file > is a quick rev up to 8K with no popping, it's just trying to > sustain it between 4 and 5 that is kind of rough. > > So, do I keep tweaking my yogurt cups or is it time to monkey with > the jets? I really don't want to monkey with the jets :) > Also, all test rides were done with the lid and snorkel bolted in > place. > > > > > -Kyle > -Sent from Houston, TX, United States > > > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en -~----------~----~----~----~------~----~------~--~---
