Topic: Yamiya "lotus" pipes (VIDEOS)

[754]

Did you get a pic of baffles..are they like 8 inches long with a perf tube sticking out the inner end ?

[kmb69]

Did you get a pic of baffles..are they like 8 inches long with a perf tube sticking out the inner end ?

The whole baffle is a "perf" tube if they are period correct.

[tweakin]

Top one is what the baffles look like, with packing inside.

Did you get a pic of baffles..are they like 8 inches long with a perf tube sticking out the inner end ?

The whole baffle is a "perf" tube if they are period correct.

[754]

I think I had the lower ones.

[PeWe]

There is restrictive disc inside the Lotus Root pipes? The diameter of the hole in it is rather wide?

I plan to replace my HM300 that has less discs than HM341.

Possible to remove the fiber glass lining in the baffles without ripping it apart?

[tweakin]

There is restrictive disc inside the Lotus Root pipes? The diameter of the hole in it is rather wide?

I plan to replace my HM300 that has less discs than HM341.

Possible to remove the fiber glass lining in the baffles without ripping it apart?

It is a thin perforated disc inside that supports the baffle. 

Here are pics of the baffle removed, doesn't look like you can remove the packing. 

[PeWe]

 OK, pipes are like racing megaphones without baffles in. I'll most likely remove the fiber.

I'll see when I have a set. New Dyno to compare with HM300.



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[Terry in Australia]

That is a beautiful bike mate, well done! I've got a set of unstamped repro pipes from Yamiya in a box in my garage that I bought from Nic for my 1969 K0, I haven't actually opened the box so I don't know if mine are the same as yours or not, so I better open it tomorrow and find out! Cheers, Terry.

[PeWe]

Terry, I guess yours are the HM300 replicas with bottle like baffles/diffusers. Removal of the fiber wrapping must be minimum to not strangle the engine. My bike like it open. A not tuned bike will probably work fine with them in without the wrapping though.

I keep an eye on Yamiya750's stock of Lotus Root. Still in stock plus they answered me about another batch in July.

Good to have another CB750 project I can use my CB750 parts on when upgrading the first one

[Holshot]

I had to listen a few times back to back but originally I was convinced on voting w/out the baffles but after a few listens I'm in agreement with the rest and like it with the baffles. Any chance you have a link to where to purchase! I'm in the market for a new set of pipes myself and I think you just helped me make that decision! Thanks for taking the time to post up all the videos to easily see/hear the differences...

Joe

[Terry in Australia]

In the OP mate.

[PeWe]

If the engine is not modified, HM300 replica work fine too! Good sound and has better flow than the more restrictive HM341.
Yamiya750 has both HM300 and Lotus Root.
HM300 no no replicas currently out of stock: 1500 USD
Lotus Root: 2250 USD
More needed:
- Heat shields
- Mounting kit for shields
- Long bolts with nuts for rear mount
- Honda passenger foot pegs
- Clamps for head spigots
- Chromed bolts for clamps
- Ex head spigots
- Chromed X-bolts
- Ex gaskets
- 2 rubber pucks for exhaust as stoppers for center stand and side stsnd
New pipes needs fresh parts around too

All plus shipping + VAT + customs.
Check Yamiya750.com

HM300 sound no baffles

[FunJimmy]

Now you're talking Tige. Perfect set of pipes for your bike.

BTW, you shop like I do! 

I know they are not correct for my K1 but after a few IPA's I pulled the trigger. Love the sound and they should give me a decent improvement in performance over the 341 repops I am currently running.

[PeWe]

Tweakin, you run with baffles in and  packing too?
The baffles are painted black, packing not painted which means that it must be possible to take the baffle apart. The end with thread look like a cap that is pressed on after paint and packing went in, the bolt keep it together and in the pipe too.

I'll try to take it apart, the packing inside cannot be good, restricting power choking the exhaust.  I guess sound will be nice with baffles in without any packing.

The 2 small extra pipes  to fix both sides pipes together was a surprise. It must restrict the flow between 1-2, and 3-4 in the end.  The rubber with clamp might not be needed?