New filter problem starting bike!

[izz]

I just installed a K&N filter on the bike today(ru-2970).  I had no problems installing the filter and starting the bike at first.  After the bike had been running a bit it required more and more choke to keep it running.  After the bike stopped running I could not get it started.  I first thought that I had not turned the gas back on but that was not the case.  What to you think that I'm missing? Could the smaller jetting have a effect on this. Prior to putting the filter on the bike it was running perfect.
Thanks
izz[list=][/list]

[The Buddha]

Yes Jetting could be the culprit, is it all stock... That's definitely bad. Maybe its getting too hot to run and hence is sorta dying before seizing up. Also is the float bowl filling up... does it do better in prime than in on or res. That means petcock vacuum isn't there.
Cool.
Srinath.

[izz]

seshadri_srinath the float bowls are filling up.  I took the carbs off of the bike to check them and when I reconnected the tank they seemed to be filling up.  How do I check the vacuum to the petcock and what should the proper jetting be for a K&N filter with stock feader and a Cobra F1 exhaust.  Seems strange that the bike was running perfect before the filter and now it won't run at all.  Also when I first started the bike it would bog down whenever I gave the bike gas. I also checked the spark plugs, the one on the left was black and the one on the left was clean.  I cleaned the left plug but that did no good.  It seems as though the bike is straved for gas.  Thanks for the help
IZZ

[Kerry]

I don't think you need to worry about the vacuum to your petcock.

I don't know much about the RU-2970, but the Stock Airbox Replacement filter I'm using is SU-5589 (see my K&N Stock Replacement Air Filter page).  AND I'm using it with the restrictor installed, because my jetting and exhaust are stock.

Question:  How does the bike run WITHOUT the filter?  I once rode the 10 miles to work and back without any filter.  I was scared to keep using the dirty filter (  Hoo Boy - did I ever have a lot to learn....   ) and my new one wasn't in yet, so...

...the first thing I noticed was the extra intake noise from the airbox.  The next thing I noticed was that the bike bogged down horribly when I gave it throttle.

Your filter is allowing too much air for the jetting and exhaust.  You could either 1) go back to your stock filter, 2) get the right K&N filter, or 3) rejet to make the RU-2970 the right filter.

All of which you already knew.  

Now, if anyone can help out with the right jetting info....

EDIT: Changed link from sisna.com to bbburma.net.

[Kerry]

The difference in your plug readings does concern me a bit.  You might want to synchronize the carbs while you've got things apart.  It sounds like one cylinder is getting a different mixture than the other.

[Von Vester]

I beleive that the air inlet to the bottom side of the carburetor diaphram is located at the edge of the carburetor inlet. If this opening is obstructed then the diaphram cannot properly meter fuel to match the air flow. Since your engine ran fine before the new filters I suspect that during the installation of the filter kit you have inadvertantly covered the small diaphram chamber inlet openings on one or perhaps both carbs.

Test this by removing your filters completely and starting the engine, if runs then the filters are the problem. When you reinstall the filters pay particular attention to all the openings around the carb inlet and don't abstruct any of them.

However, I could be wrong about the location of the diaphram inlet, I have worked on severl bike carbs and they all run together after awhile. :dunno: