Alonze pipes

[madfella]

Anyone have experience of  alonze pipes on 350ypvs f2. 
Do I need to re jet if I am using standard airbox ?

[muttsnuts]

given they are my design, then yes, plenty of experience !

Depending on state of tune then you might need to up jet, only true way to know is to have it checked/setup on a dyno, but if unsure, go up 2 sizes to be safe and start from there

HTH

[tippy]

Ive got a set of these for sale, brand new still wrapped up!

[Chewie01]

I have those pipes on my F2 and I've found that it ran a bit rich with them on. I ended up with standard jetting and taking the snorkel out the air box.
My bike's also standard and I have the pipes with bolt on silencers.
www.jap4performance.com/product/silencer-shorty-aluminium-two-stroke-assy/