
Originally Posted by
bkm
The oring is used on some of the aftermarket cylinders to seal the exhaust flange to the cylinder. Looks like a nice clean original R. Make sure you jet it properly after the pipe. Way back in the day I actually had to lean my bike out a little, when I want from stock to the FMF pipe.
i second this about leaning it out.... alot of people believe you would richen it, not true, some mods do require richer jetting and some require leaner, a pipe is one of the leaner ones!
that'll wake her up man!!!! ya should get a Boyesen Rad Valve too!!!
'85 ATC 250R
FMF Fatty & Power Core
Boyesen Rad Valve
38 PWK A/S
K&N w/PF (next purchase)
LSR +4 Axcaliber axle
LSR Duel row bearing carrier
DuraBlue Anti-fade (to be installed)
13/36 sprockets
'85 ATC 250R
Parts trike (maybe future build?)