Please can anyone with a fireblade engine tell me either the exhaust port diameter or the diameter of the manifold pipe which goes into the exhaust port?

Thanks in advance

Mark

It goes back a couple of years but I am fairly certain I made my primaries from 1.5" Stainless, this is slightly larger than the standard, maybe 1/4".

I then chopped the ends off a standard system and lathed out the inside slightly so snug fit and delicately welded the outside rings may also have needed opening slightly.

It cost £125 for 8 x 90degree 1.5" bends, 1m of 1.5" tube and 1m of 2" tube.

I made the collectors by spliting the 1.5" and letting in V sections chopped out of the two 2" tube.

Regards Mark

Regards Mark
Rescued attachment Exhaust.jpeg

Did mine with 36mm 0r 38mm OD for the (forgot!)primaries, and 42mm for the secondary....then 2"for the final pipe. I tack welded and mointed on a block of wood simulating the head arrangement...then took them to a tig welder and pressure tested for leaks

Matched 1 & 4 and 2 & 3
Rescued attachment exhaust.JPG

Hi Mark

I've just taken the engine out of my Blade Trackbike to rebuild the gearbox.
You're welcome to come round and measure if it would help.

Rob