De-restricting pipes.

[sbs]

I noticed a new annoying metallic rattle coming from the left pipe on my RZ 350 F2 commuter ride, so I cut it apart...the internal baffle/restrictor in the fat part of the chamber had cracked/failed its welded mounts.
It is a a blanking plate with 2 smallish tubes [~12mm] set through it, so I cut it all out to create a fully open chamber, & did the same to the right pipe.
I had a dyno-jet carb kit & some carbontech reeds sitting on the shelf, so I put them in too. Cut airbox , fitted Unis.
Def`improvement in throttle response/rev-out, & feels more lively, has a bit deeper sound with added snap crackle..pop.

[rz350ypvs]

I didn't know there were restrictors in the F2 pipes. Are your F2's rated at 63hp?

[sbs]

Dont know, in Australia they uprated the 250, with the end can pipes, but not the 350..
I stuck a set of 250 pipes on mine when I lost a baffle & couldn`t buy a replacement..

[sbs]

Ah, yeah, didn`t note it.. I also took the opportunity when the pipes were off to cut the headers to mount `em with collar/springs MX [or Denco] style, it`d got annoying with them always coming loose/leaking..rubber mounted mill & fixed clamp headers don't work too good.

[sbs]

I guess that if you want to find out if your stock RZ pipes are similarly stuffed, put a long rod [or hose, - if going head 1st] down them & if it hits a block, you`ll know [baffles out/cans off, 1st - obviously].