I put a pro circuit t4 pipe on my ds. The dealership mechanic told me that I didn't need to rejet it because the factory jets were fine. I also want to know if a k&n is worth the money. I am still running the stock filter.

 

I run Uni, but any high flow filter is going to make that pipe do what it is supposed to do.....make power.....then you will need to re-jet....do a search on jetting and you should find more info than you could ever remember....

Tom

 

i have the K&n fliter and endcap and it came with a 175 main to change to but i havent yet, i dont feel an problems with it...no spuddering/ popping or back fires..so i dont know if i should jet up to what they gave me...if i feel like its running great would i get more peformnce out of the new jet?

 

im piped with a yoshi and got a k and n...i run a 172.5 main mikuni and 3.5 turns out on the air fuel screw and she runs really good.

 

how would we know if we need to change the jetting...i feel like i am running good

anything to look for?

 

Lean runs Mean, not much help to you when the piston is melted. You will never damage a motor with too much fuel, you can with not enough. At sea level with a pipe and filter you should be around 170/175 and that has been proven on dyno's with A/F meters, you cant argue with them. If you have the jet at home, spend the 15min it takes to change the mainjet over and give her a try !!!!

Gav

 

you should prob jet up to around a 170 mikuni......you cant really tell...i can run a 165( stock) 172.5 and a 177.5 and can barely tell the diff between them all but the 172.5 i can tell has a tiny bit more power and does run better...its hard to tell but if you jetted up you would most likely notice a little bit more power.

 

Mine always ran rich even with a hmf and k-n.After talking to others .I ended up running a 160 main.Thats less than the stock which is a 165.Every quad is different.So jetting for
the quad is neccessary.Try going bigger and checking your plugs,If they are black and wet
go down.Mine are tan and dry.