Other 2008 KLX 140L Jetting question

Rack · Oct 15, 2011

Changed out the exhaust to the FMF Powercore 4 S/A Slip-On Muffler. Lots of popping on decel. Still running stock jetting. Anyone know what to change it to or how to adjust the carb?

Nighthawk016 · Oct 15, 2011

KTMRack:
Changed out the exhaust to the FMF Powercore 4 S/A Slip-On Muffler. Lots of popping on decel. Still running stock jetting. Anyone know what to change it to or how to adjust the carb?

popping on decel means lean, so go up on the pilot 1 or 2 and the main 1, should remedy your situation

James · Oct 15, 2011

Check the How To section, there's a couple good jetting articles in there.

josmoloco · Oct 15, 2011

Those bikes are WAY to lean stock, Now it is even leaner, you are going to have to go up a few sizes on both jets :prof:

Mihylo33 · Oct 15, 2011

yeah go up about 3 sizes on both jets....
I went from a 105 main to a 120 on the ttr and up from a 10 to a 17.5 on the pilot... lots of over rev....

Rack · Oct 15, 2011

No jets in stock today ANYWHERE!!!

SOAB :banghead:

bobkyle2 · Oct 16, 2011

Just use a drill bit and reem accordingly

...

Mihylo33 · Oct 16, 2011

KTMRack:
No jets in stock today ANYWHERE!!!

SOAB

yeah, no one ever keeps jets in stock for them buggers... best bet is Mospo, RMATV or FMF...

jackson409 · Oct 17, 2011

Just stick that spare 08 KTM 450 motor in it and do a KLX mod like CDA did with his TTR :smirk:

Rack · Oct 17, 2011

jackson409:
Just stick that spare 08 KTM 450 motor in it and do a KLX mod like CDA did with his TTR

I've been thinking about modding it to a 500 :devil:

timoyz · Oct 17, 2011

http://www.ebay.com/itm/1991-CR500-CR-500-engine-motor-kit-CHECK-OUT-/280747983104?pt=Motorcycles_Parts_Accessories&vxp=mtr&hash=item415de24100#ht_500wt_1054