Dunstall Replicas - 1971 OIF T120R

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
I'm still waiting on parts for the side stand repair per the main thread, but repacked the mufflers--which took about 30 minutes. Very nice aspect of these replicas is the baffles slide right out so you don't have to R&R the mufflers to serve them.

As you can see, utterly useless, wispy packing comes inside. I got the super duper (supposedly) expanding stuff from the UK, and didn't use all of it because you're quite limited in how much you can wrap the core by the hole in the end of the can. Image no. 3 shows what was left over.

Moreover, due to the taper you cannot cover the first few inches, and must next put an abbreviated wrap around the next few inches. The balance is right about 1.5 times around the core if pulled tightly.

The sound is a little quieter, or perhaps slightly more mellow... I can't tell which until I fix the manifold air leak and get the bike to settle down into an idle. After that and the side stand are done, I'll post a video with some varying rpms and load and we'll see how she sounds!
 

Attachments

  • repack(1).jpeg
    repack(1).jpeg
    252 KB · Views: 7
  • repack(2).jpeg
    repack(2).jpeg
    136.7 KB · Views: 5
  • repack(3).jpeg
    repack(3).jpeg
    298.8 KB · Views: 5
  • repack(4).jpeg
    repack(4).jpeg
    150.2 KB · Views: 8
  • repack(5).jpeg
    repack(5).jpeg
    162.6 KB · Views: 9
Nice! What’s the wire you used? Anything special, stainless steel?
 
Nice! What’s the wire you used? Anything special, stainless steel?
I'm sorry that I didn't see this. I don't know why I didn't see a notification (operator error, I'm sure!).

No.. darn it! I should've used some stainless safety wire for affixing bolts I have... good idea. Just good old mechanic's wire I had lying around.

Here's a link to how these sound--and my apologies for this project taking soooo long to get running.

Idle and a few throttle blips.

So, bottom line? These aftermarket Dunstall replicas are not too loud, after all--with the upgraded packing, that is. In fact, the sound from the saddle is really nice. And the performance--together with the Mikuni carbs I added--is excellent.

I'll be adding a GoPro video to the main restoration/mods thread next weekend, so you'll be able to hear them from my perspective riding the bike.
 
Okay, here is a video (there are two parts for some reason I don't understand) so you can hear the Dunstall replicas with Acousta Fil packing from the UK. Microphone is attached to my back, so it's not actually this loud of a bark from inside your helmet... but it sounds pretty sexy!

BTW the tach seems fairly accurate, but the speedo needs calibration and is wildly optimistic right now...

1971 Bonneville T120R OIF cafe racer POV

1971 Bonneville T120R OIF custom cafe racer POV - Part 2
 
Last edited:
Back
Top Bottom