I have an 05 500 and just ordered a Yosh full system and K&N snorkel air filter system to replace the lid and stock flat filter set up. Stock jet is a 150. Any recommendations on what I should jet up to. Use is just about always at sea level. I was told 165 to 170? Also, I have heard that I have to adjust the needle to the 4th position and then also adjust the fuel / air screw?

Thanks in advance.

- Walt

 

165 seems a bit high....

With a k&n drop in and a Yoshi slip on at 1100' I didnt need to rejet at all.

 

At 150 jet I am running SUPER lean at 1000 ft elevation and around 80 degrees.

Im going to a 160 and everything is stock so I would say start at 165 to 170 and go up.

 

Wow..never heard of that before..My plug is mint and I've always heard Pred's were jetted rich. I'm also at 1000' feet.

 

I'm at 1100ft with a 155mj, you see my mods and I'm a bit rich as heatseeker says Preds are rich from the factory.