have 2001 Yam R6 just put KN air filter in it---bike ran flawlessly b4 now it wants to cut out?

Question

bike acts like it wants to cut out as i open the throttle--bike has two brothers slip on pip[e--dont know if its been jetted--with stock air filter that was in it i would say probably NO what can i do to try to tune it-make it run correct now that it cuts out with the KN filter in it---KN says jetting-tuning may be required? what can i try first and if not what can i do for sure to fix this new problem (bike is excellent shape never had mech probs or anything before the KN went in)

Answer 1

When you install a free flowing air filter like a K&N, the fuel-air mxture is altered and re-jetting is required.
There are no quick fixes.
http://www.powersportrider.com/CGI-BIN/ZCATJPG?catpup=ST0206C
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Answer 2

By installing the K&N you allow the engine to draw more air, (Less restriction through the filter), because of this the air fuel ratio has changed, causing a lean condition, this will make the buke run hotter and will in time cause it to fail.

Your jets may have been able to handle the after market pipes, but with the new filter they are no longer able to.

You could check for intake leaks and vac lines disconnected, but have a shop check the bike on a Dynomometer and tune it properly.

Answer 3

ck 1st thing first, the vacuum lines, the carb boots for leaks, kinked lines ect. I've never heard of rejetting for a k&n filter, it has to be something that happened in removal and reinstallation.