Exhaust spring, borrowed from sixpac440's thread

[noseoil]

Here's how the die spring sounds in my bike.
https://youtu.be/rIAXOJVS7WE

 

[Havasu Dave]

That is a beautiful trailer! :thumbsup:

 

[OND]

Lol ...that's what I thought to , very nice little camper !

 

[noseoil]

Damn, it was going to be an exhaust thread. If you're bored, here's the build on the trailer.
Teardrops n Tiny Travel Trailers ? View topic - Tucson tortoise

P.S. Photobucket wants $400 a year now to host pictures for uploads, sorry, but I'm not paying so the build log has no images.

 

[OND]

Supporting member at the OldMiniBikes costs $25.00 a year and You have unlimited photos.

 

[noseoil]

OK, did a test run today for top end with the spring in place. It knocks about 3 mph off of the 51 mph best speed, best today was only 48 & it struggled to get there. Definitely limits the high rpm stuff, so there's always a trade off on things, but it is lots quieter than an open pipe. Nearly a 10% reduction in power & breathing from the restriction is a lot!

 

[SAS289]

OK, did a test run today for top end with the spring in place. It knocks about 3 mph off of the 51 mph best speed, best today was only 48 & it struggled to get there. Definitely limits the high rpm stuff, so there's always a trade off on things, but it is lots quieter than an open pipe. Nearly a 10% reduction in power & breathing from the restriction is a lot!

In an earlier post of yours you mentioned the top speed at a certain RPM. Was it something like 3700 RPM's at 45 mph? What was your RPM's at 48 and 51 MPH?

 

[noseoil]

Sorry, it's classified, but a bit over 3600....