Pretty in Pink, dunno why
Join Date: Feb 2009
Location: Redondo Beach
The K&N is reputed not to flow as well as the stock foam filter or a Uni.
K&N have long made advertising hyperbola out of their flow characteristics. They conduct their flow tests at wide-open throttle and compare to stock filters. Not very real world.
150. Jeebus! I have never found anyone who could, with numbers and objective evidence, demonstrate that the KLR could actually run at the correct AFR with much over a stock jet. Honest. Maybe one jet up, but that's about it. Stories abound of "I installed a realy big jet and now I can..." but I've never seen AFR numbers.
OK, I have the snorkel out of the box, the L-Mod done, a 685 kit, ported head with big valves, and a quite free-flowing muffler. I'm using the KLX needle on the second clip with a 142.5 jet.
Now, the KLX has an agressive taper and therefore a comparison of KLX/142.5 jet to stock + two washers/150 jet is not valid, but you can see where I'm going with this...
Somewhere (probably on my other computer) I have a comparison of the taper of the stock needle to the KLX needle. From that we could figure out just how those two scenarios campare.
Do try the 150 and see what happens; the worst that could happen would be an over-rich condition which will show up on a proper plug test. Schnitz is an easy source for jets; their price plus shipping is far less than the average dealership.
Oh, and did you measure the thickness of the washers? I have seen stainless number 4 washers from .010" to .032". Some of them were flat, some were cupped, some had punching burs that increased their effective thickness.
In answer to one of your original questions - you can bring down the idle with the large thumbscrew on the right side of the carb. Turn it anti-clockwise a bit until it's down to your desired 1000 rpm.
are words so important they cannot be too often used.” -Napoleon Bonaparte
"Say, that's a nice Prius." -Nobody
Sting like a butterfly.
Last edited by Tom Schmitz; 06-13-2011 at 04:36 PM.