New domain: www.Speed-Talk.com

The forum is currently running on the new domain and server. The old domain will remain active for a while to forward any (less frequent) visitors.
Update your bookmarks to https://www.speed-talk.com or
https://www.speed-talk.com/forum/

Motorcycles exhaust

General engine tech -- Drag Racing to Circle Track

Moderator: Team

Post Reply
Tombola1342
New Member
New Member
Posts: 1
Joined: Thu Apr 11, 2019 5:22 am

Motorcycles exhaust

Post by Tombola1342 » Thu Apr 11, 2019 8:35 am

Hi all, I am currently restoring a GPz 550 and I would like to fit a stainless exhaust however I will need to get one made up as i cannot find any for a reasonable price.
What I would like to I know is what can Be done to get the most power out of an exhaust in relation to shape, size and style. The original exhaust is 36mm dia across at the head, then down to 32mm for the rest of the exhaust. It’s 1.5mm thick. It’s a 4 into 1 standard and I’d like to keep like that really. I have fitted a stage 2 jet kit to it and am also going to get a stainless intake manifold made up.
They are CV carbs, I’ve heard that they don’t run very well without the air box and all fitted however I’d like to run the bike on this manifold. Can anyone help me on the shape/style for intake manifold?
Thank you in advance anyone!

miniv8
Expert
Expert
Posts: 632
Joined: Mon Sep 11, 2006 5:22 pm
Location: ICELAND

Re: Motorcycles exhaust

Post by miniv8 » Thu Apr 11, 2019 9:22 am

Its basicly four 125's
I'd take a look into the dirtbike singles and go from there on both intake and exhaust comparisons.

Someone will suggest Pipemax I bet, and thats the way to go if you want specifics.

Be careful with the jetting, it might need more if you are succsessful.

stealth
Guru
Guru
Posts: 1095
Joined: Fri Jun 30, 2006 9:37 am

Re: Motorcycles exhaust

Post by stealth » Thu Apr 11, 2019 11:34 am

You may find the ones available extremely reasonable after making your own... Or having someone custom build.
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore, all progress depends on the unreasonable man.

Brian P
Guru
Guru
Posts: 1614
Joined: Wed Jan 02, 2008 7:35 pm
Location: Toronto, Ontario, Canada

Re: Motorcycles exhaust

Post by Brian P » Thu Apr 11, 2019 4:34 pm


Post Reply