How Are These Pipes Made?

[Smoker]

Just in case you didn't notice: Put some air in the front tire before trying to ride it.

Thanks for watching out.

Those wheels are used so I don't have to put the magnesium wheels on during fabrication.

[Smoker]

My god they still not finished. Whats he doing .... smelting his own ore lol

Good to hear from you!

It's partially my fault. I've been in a good amount of pain since my last crash. Been working on the RZ Supermoto project here. Nice to have a little more room in the garage.

I still need to design and fabricate the new machined spring hooks, and decide what to do about (custom) silencers.

[kenny]

Great shame about his and your crashes. To be close to winning and see it taken away would be a real downer for sure. As I suspect you know that what I said was in Jest hence the LOL at the end

[Smoker]

Great shame about his and your crashes. To be close to winning and see it taken away would be a real downer for sure. As I suspect you know that what I said was in Jest hence the LOL at the end

I do, but it's definitely been a long time.

Just feeling guilty. I should be getting more done on my end.

[Smoker]

Haven't found the time to design cool (shaped) one-off silencers.

Need to keep moving forward, so would like to try to make my own titanium silencers using the standard 2.25 inch tube O.D. I don't like rivets on silencers, so will try end caps that seal with snap-rings. The end with the mounting holes will be welded on. Length will probably be 8.5 inches.

Ready to order the titanium, but unsure what tubing wall thickness to use?

Might be a question better asked in a welding forum.

Considering 2.25 inch O.D. tubing in the following wall thicknesses:
.039"/1mm
.045"/1.14mm
.050"/1.26mm
Also found .083"/2.11mm, but probably heavier than I need.

The purpose of using titanium is so that the silencers could be coated with gold titanium nitride.

Any advice is appreciated.

[Smoker]

Second round of one-off spring hooks.

Wanted them to look completely different than the previous hooks.









Future is uncertain, but after this set of pipes, it's time for RZ500 pipes. Need to finish the custom swingarm and do some tail/frame mods, first.

[lost1750GTV]

Your attention to everything makes me feel like a thug.

[Smoker]

Gratuitous pic of my pipe design.

Trying to add symmetry.

[Smoker]

Any idea where to buy stainless perforated silencer tubing in 1 inch size?

I've found many larger sizes, including 1.26 inch.

The only 1 inch tubing I've found is LA Choppers brand. Over $30 for 24 inches.

Just thinking there must be other suppliers. Any ideas?

[Bengt Weil]

Here's the 1" perf stainless tubing at a bit lower cost...

https://www.denniskirk.com/la-choppers/ ... gKyFfD_BwE

It is only 24" long and at 1" OD, the ID is probably more like 15/16".

[Smoker]

Here's the 1" perf stainless tubing at a bit lower cost...

https://www.denniskirk.com/la-choppers/ ... gKyFfD_BwE

It is only 24" long and at 1" OD, the ID is probably more like 15/16".

Appreciate that very much!

Ended up paying more than double that price for Toomey baffle tubing.

Looks like the Toomey tubing has larger holes and less surface area.

[MK]

You are aware that 1 inch outer diameter yields to some low'ish 22.x inner diameter?
That'd be somewhat small'ish for a higher state of tune and / or engine displacement.

Building the can with the desired stinger diameter is 80's knowledge.
Nowadays people use a restriction / nozzle of exactly the required size somewhere between end cone and can. All the rest of the piping has a larger diameter and thus doesn't disturb that tuned stinger diameter anymore.

I run 24.5 - 27 mm inner diameter Jolly cans.

[Smoker]

You are aware that 1 inch outer diameter yields to some low'ish 22.x inner diameter?

Yeah, I'm aware, and appreciate you watching out. Mine is 22.93mm.

I copied the new Toomey design with o-ring seals.
I could have designed from scratch, but not even sure I can get these titanium silencers fabricated. My local welder is retired, and my time is growing shorter.

I have no CAD skills, so I'm reverse engineering with modest measuring tools. Trying to draw the end cap that mounts to the pipe is proving way more difficult than it looks.

The idea is, if the titanium cans don't work out- I can use the new, aluminum Toomey silencers I already have. The custom exhaust flanges are designed to fit them, so that's the backup plan.

I don't really see other options for buying silencers. No way am I using rivets on any of my custom bikes!

[Smoker]

Which one of these perforated silencer tubing would you use, and why?

I'm guessing that the tubing on the left with larger holes would quiet the noise more, and give slightly less performance.

Also guessing that the tubing on the right with smaller holes would quiet the noise less, and give slightly more performance.

They are both from Toomey silencers.

Definitely appreciate all opinions.

[MK]

I'd rather guess the right one will be more quiet as it has more relative hole area ( = more hole area in the same base area)
Performance won't be different within measuring tolerance.
Left one is better to weld and less prone to carbon build up (the holes in the right will be clogged earlier). Also likely more resistant to vibration.