Hey my cousin has a 06 pred tld and wan'ts to know what jets he should ues.it is stock motor with pro circuit exhaust and oem style k&n air filter. any anything at all will help

 

Try 10 to 15% increase on main jet.b If has for instance a 150 main,then try a 160, run machine at 3/4 top end speed,hit kill button,then check plug. Should be medium tan around electrode. IF appears whitish,may have to go up another size! This is not a cut and dry situation as every machine different! If has a lot of backfiring when letting off throttle at high rpm,usually lean condition. Final adjustment can be made with lowering/raising slide needle if necessary if stumbles off idle,etc. You might want to get a couple jets to save a trip.FORGOT,but first try with stock jet on plug chopping,plug color,may not have to do much,maybe just raise needle?

 

I have an 07 preddy tld. I have a full HMF exhaust and UM racing intake, which replaces the old intake and has no lid. I am at 4200 ft elevation. Here are my settings:

Stock - 4200 ft - Sea Level

Main Jet 150 - 170 - 175
Pilot Jet 42.5 - 42.5 - 42.5
Fuel mix screw 2.5 turns - 3 - 3 (counterclockwise)
Needle 2nd groove - 3rd - 3rd

I haven't run it at sea level yet, but I am presuming this will be the proper setting. I get a nice tan colored plug, no backfiring. Since you essentially have a stock intake, I would think you would be around 165. Either way, follow OPT's advice and you will get there. Also, you may or may not need to move the needle. I have a dyno jet kit. It comes with a new (better) needle to replace the stock one and an assortment of jets, as well as instructions and suggestions. You could also call pro circuit, they will have recommendations for your set up.