jetting my carb

[james_house06]

i have a 2009 ltz400 im getting a slip on pipe and need to know what the best jets to get for my carb ive been thinking about getting a dynojet kit but have been told not to. can anyone help me plus any info about a lexx mxe pipe would be great thanks

[cataway]

i must of mised some thing ,i thought 09 were FI

[james_house06]

yeah sorry about that i was reading about the 09 when i wrote the thread i have an 08 i wish mine was efi but im still making payments on mine so im stuck with it any other mods i can do to it would i would be very thankful for the advice all my riding buddies have 450r i want to be able to keep up the pipe and jets are just a starting point.

[k2thej88]

you need to get a full exhaust to make any difference slip on isnt going to do much, its more for loooks and sound!

[james_house06]

ok so now iknow i need a full system but no one has said anything about my carb i know that if i put a pipe on it i need to jet it. I also looked ot my air filter last night and i need a new one any advice on an aftermarket or just the stock one will do. does it make any difference let me know thanks.

[k2thej88]

well i would go k&n and if you do that i would mod your air box to fit a 400 ex boot and run no lid with out wears prefilter over the k&n

and about jetting it im not quiet sure how much bigger or jets youy would need but i havent heard very good things from dyno jet jet kits i would just go to your local powersports shop and get the next couple size biggger jets then stock your main and pilot jet possibly

[cataway]

maybe a 160 main jet and most likely a #25 pilot jet

[miles Machine]

i agree with the pilot but for a slip on i would suggest a 145 mikuni jet remember the jets kits are often different sizes compared to name brand but if your gonna get a k&n (which i dont recommend if you ride in silty sandy areas) then i would use a 155 to maybe a 165