will This Mod Work?

[raynalyn]

First, let me say how helpful this forum has been to me in my effort to restore my '82 450 Nighthawk. I will post pics whenever i make some reasonable progress.

The Question is I really do not like the 450 muffler at all it is too bugle like. I really like the 80's nighthawk 550 muffler. So how hard would it be to put a 550 muffler on the 450? Or is this an impossibility pondered by a newb only.

[detdrbuzzard]

depends on if the 550 muffler will slip on the power chamber and if any mods need to be made to bolt it to the bike

[martian]

The general rule is that mods done after the collector don't typically require re-jetting, etc.  You just need to be able to make the parts fit.  Unfortunately I'm not going to be able to offer you any help with fitment.

I do know of several guys running stock Sportster mufflers on their Magnas with minimal modding.  Not sure how they work work on a Nighthawk though.  You can often find stock Sportster mufflers free or cheap when people upgrade their exhausts.

Martian

[detdrbuzzard]

if the back pressure changes alot he would  need to rejet

[martian]

if the back pressure changes alot he would  need to rejet

True, however most of the back pressure is obtained in the collector.  Slip-on style mufflers provide very little back pressure to the exhaust.

I'm not saying it isn't possible but most times re-jetting isn't required when changing slip-on muffs after a collector.

[raynalyn]

I love the muffler on Wanetors 84 cb550 restore  http://nighthawk-forums.com/index.php/topic,1130.0.html

I just wanted to know if that muffler will work on my 450 nighthawk? Can anyone can tell me what kind of muffler it is? I posted there but no response.

[JordanA]

It looks like a stock muffler, very similar to the one on my 85 650.

[raynalyn]

Thanks jordan!

Do you (or anyone else) have an idea if this muffler would work on my 82 450 nighthawk?

Thanks Again!