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 -~----------~----~----~----~------~----~------~--~---
