exhaust header

[Guest]

I am looking into do another exhaust this winter on my bike, (4 into 1.) I have the skills for the welding of the exhaust but I need to know what size headers will fit.

Just curious if they're any other headers that would fit...

Oh and the carbs are going to be rebuilt as well so I dont know if stage kits would be needed either..

[poorgradstudent]

1981 GS 550 T. K&N. Yoshimura Big Bore Kit & Camshafts. Stage III Jet Kit.

This the bike?

[gmansyz]

Header parts

Hiya. First, I would check available tubing sizes. But I think 16 gauges tubing in 1.25"O.D. or 1.35". Figure 25-30"long.But you could try a 4-2-1 instead. Figure where to source or make your flanges as well. Use some thicker and larger tubing to make the spigots.
Note, you can weld Titanium, you may want to look at an '01-'06 GSXR1000 factory header as well. Just mod it. Or maybe the '04-'09 GSXR 600/750 as they should also be Titanium. Then the older GSXR's were steel and could also supply the donor parts.
Laters
G

[whenpigsfly514]

This the bike?

Yes. That bike.

[Steve]

Oh and the carbs are going to be rebuilt as well so I dont know if stage kits would be needed either..

Rebuilding the carbs does not eliminate the need for a jet kit.

The jet kit is because you are allowing more air to flow through the carbs than when the bike left the factory, so you need more fuel to keep the ratio correct.

.

[Sci85]

Those ports are just over 1.5" in diameter if memory serves me correctly.

I run a MAC header.