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

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post #1 of 7 Old 08-28-2019, 09:25 AM Thread Starter
2nd Gear
 
Join Date: Jun 2018
Posts: 110
Is there an online KLR jetting guide anywhere? I’m ready to fine tune.
2014.5 NE
-Lexx pipe, Uni, de-snorkel,
-22 cent mod with 2 # 4 brass washers, 7/64th slide drill, air screw moved from stock 1 3/8 to 2 turns (stock pipe at the time I did it)
-stock jets.
-Considering L-shape mod
-Southwestern PA
-Altitude 1300 home with a normal range of 1000 to 3000 feet
-Avg riding temp 60’s (40 to 90 range)
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post #2 of 7 Old 08-28-2019, 09:31 AM
4th Gear
 
Join Date: Aug 2010
Location: Kelowna, B.C.
Posts: 2,319
Not really, to really fine tune weld in an O2 bung and get a sniffer. I prefer the KLX kit to the 22 cent mod bandaid. FWIW, my setup is similar except for the 4 1" holes in the airbox top (L-mod is fine too) and I use the following;

- 142.5 KH Main jet; 2nd clip, no shims
- stock pilot, 2 turns on the fuel screw

I didn't bother drilling the slide hole but that makes no difference to the jetting anyhow.

2 cents,
Dave
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post #3 of 7 Old 08-28-2019, 09:44 AM Thread Starter
2nd Gear
 
Join Date: Jun 2018
Posts: 110
Forgot to mention I will probably do the KLX needle when I do. I did the 22 cent just as a band aid to the desnorkled and Uni stock bike knowing that I was going to add a pipe eventually.

Incidentally while I generally like quiet bikes I think stock was too quiet. I’ve literally had several people mention how quiet it is stock and how they didn’t hear me pulling up. I’ve also noticed more startled wildlife and hit a doe last fall with the stocker. Coincidence, who knows?

The Lexx also fit into my priorities of less weight, more power (debatable but not much), low cost and improved looks. Unfortunately there wasn’t anything in between.
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post #4 of 7 Old 08-28-2019, 10:11 AM
4th Gear
 
Join Date: Aug 2010
Location: Kelowna, B.C.
Posts: 2,319
I like quiet but the stock pipe is heavy and ugly. I have an FMFQ4 (rated at 96db) on my 2001 and a LV X3 on my 2000 (rated at 94db). The LV is noticeably quieter and I'm considering ditching the Q4.....I may try the Lexx just to do a direct compariso to the LV; periodic repacking doesn't scare me.


Dave
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post #5 of 7 Old 08-28-2019, 10:39 AM Thread Starter
2nd Gear
 
Join Date: Jun 2018
Posts: 110
I found the Lexx to be higher quality than I expected for the price. I did have some fitment problems though, primarily the mid pipe is extremely tight into the silencer and slightly loose on the header. It was so tight that I couldn’t fully insert it then I broke the supplied springs trying to install them because they seemed too short. I lightly scratched the silencer in a non visible area but figured they wouldn’t accept a return so I didn’t bother. They gave me a run around and could only supply more of the same springs so why bother. The pipe is so tight that I don't things the springs are truly needed. From what I’ve seen online it seems to be a common problem. I used high temp sealer on the header side as recommended but I’m skeptical that it does that much. I put too much on and found some blowing out the back haha.

Also, there is definite weight savings but once you factor in all of the mounting hardware it’s not as much as everyone says. Sure if you compare stock pipe to the Lexx it’s less but add the extra bolts and hangers and the scale tips back some. I think people don’t want to admit the truth sometimes. Finally I had to buy a new mounting bolt since one they supplied was too short.

Other than that I’m happy. I like the sound as much as I can like the sound of a big low performance single. Although I’m generally conservative politically I feel kind of guilty with the extra noise plus ditching the stock catalyst and jetting richer. I’ve got a fair amount of tree hugger in me and I do think pollution is a problem. Hey at least I’m using less gas than my truck though right ; )
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Last edited by EricZ; 08-28-2019 at 10:42 AM.
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post #6 of 7 Old 08-28-2019, 10:43 AM
4th Gear
 
Join Date: Aug 2010
Location: Kelowna, B.C.
Posts: 2,319
Yeah, the springs are a common issue; someone recommended some springs from another brand that were available separately but the name escapes me at the moment. Keep an eye on the joint by the airbox; you don't want to melt a hole.

cheers,
Dave
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post #7 of 7 Old 08-28-2019, 11:46 AM Thread Starter
2nd Gear
 
Join Date: Jun 2018
Posts: 110
Yep. I checked it the first few rides but haven’t looked recently. Need to check again.
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