Kawasaki KLR 650 Forum - Reply to Topic
2008+ KLR650 Wrenching & Mod Questions For repair, maintaining or modifying discussions related to the newly updated 2008 and beyond, Generation 2 KLR650 Motorcycle.

Thread: Question about K&N air filter on KLR 650 Reply to Thread
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  Topic Review (Newest First)
04-22-2017 09:52 AM
Ghost Rider I have always been a fan of K&N filters. But when I did some research as to what it could do for my 08 I found out it does not increase the flow all that much over the stock filter. So I never got one for the KLR. One piece of advice for anyone who is suffering random Rich mixture issues is to check the carburetor float. the float could be set too high of a level or there could be a leak in the float ( how many here remember whatever floats were made of metal and you could check them with a lighter LOL ? )or it might not be sealing properly in the float jet area.

Sent from my SM-G930V using Tapatalk
04-19-2017 10:26 AM
DPelletier
Quote:
Originally Posted by pdwestman View Post
Standard main jet on Gen2 2008-2017 is a 145.
Thanks Paul; couldn't remember if the Gen2 main was a tad richer or leaner and was too lazy to check! LOL

Dave
04-19-2017 09:54 AM
pdwestman
Quote:
Originally Posted by DPelletier View Post
Yep, the 132 DJ should work fine if you have one. IIRC stock Gen1 is a 148 KH (Gen1's and 2's were different......152?)

Dave
Standard main jet on Gen2 2008-2017 is a 145.
04-18-2017 09:28 PM
DPelletier
Quote:
Originally Posted by craigf View Post
I was re-reading this. I have a complete DJ kit in my pile of KLR goodies. I see in the chart above that a DJ 132 is equivalent to the KH 142. Would you risk using the DJ or get a KH 142.5? I can't remember what the stock jet was, but I still have it also.

Thanks!!

Craig
Yep, the 132 DJ should work fine if you have one. IIRC stock Gen1 is a 148 KH (Gen1's and 2's were different......152?)

Dave
04-18-2017 08:13 PM
craigf
I am going to rejet also..

Quote:
Originally Posted by DPelletier View Post
Definitely let us know how you make out.

If it was mine; I'd rejet with the DJ needle and the jetting I spelled out, I'd put back the stock filter and filter cage and I'd do the L mod or drill the 4 - 1" holes in the top of the airbox. With the snorkle out it isn't too bad without the airbox mods but as you can see from Cary's testing, even a stock-ish KLR benefits from a bit more flow.

cheers,
Dave
I was re-reading this. I have a complete DJ kit in my pile of KLR goodies. I see in the chart above that a DJ 132 is equivalent to the KH 142. Would you risk using the DJ or get a KH 142.5? I can't remember what the stock jet was, but I still have it also.

Thanks!!

Craig
04-17-2017 10:39 PM
650Stew A buddy of mine had a bunch of issues with his 08 last year. Running rich and kinda underpowered. He cleaned the carb, switched from his noisy Supertrapp muffler back to the stocker and it still ran crappy. He ditched the K&N filter and put on a stock foam filter, no more problems. I'd toss that K&N for a stock foamy and see if that makes a difference.
04-17-2017 09:24 PM
craigf The links to the air box mods and air filter threads were interesting. I noticed the gaps from the rear tire area to the air box intake area. There was a lot of dust build up in my air box. I had cleaned it prior to the last ride, so it had no miles to speak of.

I appreciate everyone's help/comments and links.
04-17-2017 09:06 PM
pdwestman craigf,
Give this thread a good read,
http://www.klrforum.com/2008-klr650-...ir-filter.html

larry31 reduces the amount of Dirty Air coming off of the rear tire.

Not quite the thread that I was looking for, try this related one,
http://www.klrforum.com/2008-klr650-...ification.html

Click on a members name, find more info, postings, threads!
04-17-2017 01:25 PM
DPelletier Definitely let us know how you make out.

If it was mine; I'd rejet with the DJ needle and the jetting I spelled out, I'd put back the stock filter and filter cage and I'd do the L mod or drill the 4 - 1" holes in the top of the airbox. With the snorkle out it isn't too bad without the airbox mods but as you can see from Cary's testing, even a stock-ish KLR benefits from a bit more flow.

cheers,
Dave
04-17-2017 12:51 PM
craigf The quote form KLRCary was very informative. I had already seen some writing about the Poor DJ performance/fit issues. I had been looking for info on which jet to go back to.

If anyone is interested, I will post back my results in a few weeks. But I am confident the combination of bad air filter design and rich jet run condition is my problem.

The key is, that when it runs, it is great. Top end is good, low end is good until it goes to starving for air.
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