I'm planning on gettiing my S40 rejetted when I get home back to sea level. (bought in Denver, driving home to San Francisco currently)

Since I'm doing that anyway, I figured I'd have a dyna installed at the same time since it requires rejetting as part of that process.  EFFICIENCY! (and also... sweet exhaust tone...)

I'll have a shop do the installs so I wanted to gather all the stuff I'll need to give them in one go. So I wanted to clarify a few things based on all I've been reading:

1.) I'm getting this muffler model: 65747-94
2.) I'm getting the exhaust adapter from Ryca: http://shop.rycamotors.com/exhaust_adapter.html

That adapter seems to come with the clamp. So my questions are:

1.) Is there anything else I need to do this install?
2.) Do I still need to fashion the tin-can gasket or is the size mismatch solved by the Ryca adapter?
3.) Will I still need to cut the muffler with 6 slots or is that also covered by the adapter?

Thanks for any help. I'm hoping to drop of a pile of parts to my mechanic in a way that is pretty clear what needs to be done.

I just installed a Dyna on my bike. No adapter. I did use the tin can method and bloodied up my hands good. I only used one bolt on the rear muffler support. I haven't started it yet, waiting for a new petcock. But it looks fine and I cant see why you would need any adapter.

Serowbot wrote on 09/30/13 at 10:18:46:


So yesterday my road trip just happened to have me going through Los Angeles so I stopped by the Ryca offices in Whittier, CA instead of shipping the adapter up to myself.  Great guys! ...And cool to see the workshop in person.  They were hard at work with cafe fiberglass panels and Savage frames in various states of tear-down all over.

When I bought the adapter it comes with one clamp and I asked them about the 2nd clamp and they said the muffler will already have one clamp on it.  Is that true? Or should I be sourcing a second clamp somewhere?

I arrived back to the bay area yesterday and started calling shops to see about getting the dyna installed and getting the rejet done at the same time (both for my altitude change and the new exhaust).

It was interesting to talk to shops here in California. One woman told me "we try not to even say the word exhaust on the phone anymore." Apparently CA emissions are being cracked down on hard and shops are getting big fines for installing non-compliant aftermarket exhausts. Many shops wouldn't touch the dyna install.  One shop said they'd consider it if it was a CA compliant model of the Dyna.

I HOPE it is. I ordered it off an eBay seller from California, though that doesn't guarantee anything.

Does anyone know how to check a Dyna to see if its the CA model or the other 49-state version?

I really want to believe the holes on the sides here are the holes you mention but I don't think that's the case. This is the 49 state version, isn't it? Crapballs.

Anyone got a pic of the cali model??

deejaysham wrote on 10/05/13 at 11:35:30:

...other famous last words... ...

Naahhh,, just dont crush it,, Itll work, as long as you havent accidentally "modified" its size or shape,,You COULD carefully expand it a little so the header has to crush it against the head a little better,, but I didnt & iit worked out okay,,