Author Topic: Yamiya 300 pipes? Anyone have them? (Read 3507 times)

bender01 · « **on:** June 05, 2015, 05:29:37 PM »

Im close to pulling the trigger! I want new 4/4s and cant pay for NOS! Got a notice from DSS U/K back in stock! But fine print said blemished. So started searching e-bay and these are always around plus another site which I think sells same pipes. Anyone used these? If I get caught in the rain are they going to rust like a Mac? I need 341s but only you guys are going to notice they aren't correct. http://www.ebay.com/itm/HONDA-CB750-EXHAUST-MUFFLER-K0-SANDCAST-NO-NUMBER-NEW-M066-/131526626927?hash=item1e9f990e6f&vxp=mtr
heres a link.
try these instead from machiv motors
http://www.ebay.com/itm/Honda-CB750-Exhaust-Stock-Sandcast-K0-KO-No-Stamp-Pipes-NEW-1969-1970-THE-BEST-/381241698528?hash=item58c3c6a8e0&vxp=mtr

Retro Rocket · « **Reply #1 on:** June 05, 2015, 05:44:55 PM »

You posted the same link twice...

Davez134 · « **Reply #2 on:** June 05, 2015, 06:12:08 PM »

I have the ones from Yamiya. Great quality and fit!

goldarrow · « **Reply #3 on:** June 05, 2015, 06:13:41 PM »

Quote from: Davez134 on June 05, 2015, 06:12:08 PM

I have the ones from Yamiya. Great quality and fit!

Share video? So we hear how it sound

Davez134 · « **Reply #4 on:** June 05, 2015, 06:21:57 PM »

Quote from: goldarrow on June 05, 2015, 06:13:41 PM

Quote from: Davez134 on June 05, 2015, 06:12:08 PM
I have the ones from Yamiya. Great quality and fit!

Share video? So we hear how it sound

Videos don't really do these things justice, but I have a couple on my build thread, one on page 12 of first startup, and one on page 16, with baffles removed. Thread is here...
http://forums.sohc4.net/index.php/topic,139768.0.html

Sent from my iPhone using Tapatalk

goldarrow · « **Reply #5 on:** June 05, 2015, 06:32:12 PM »

Quote from: Davez134 on June 05, 2015, 06:21:57 PM

Quote from: goldarrow on June 05, 2015, 06:13:41 PM

Quote from: Davez134 on June 05, 2015, 06:12:08 PM
I have the ones from Yamiya. Great quality and fit!

Share video? So we hear how it sound

Videos don't really do these things justice, but I have a couple on my build thread, one on page 12 of first startup, and one on page 16, with baffles removed. Thread is here...
http://forums.sohc4.net/index.php/topic,139768.0.html

Sent from my iPhone using Tapatalk

Just watched. With the baffles removed, sounds about right compare to my hm300 w/o baffles, sweet!

bender01 · « **Reply #6 on:** June 05, 2015, 06:39:57 PM »

Thanks Davez134! just whipped through your k-2 thread! Chrome looks nice and thick! The baffle really looks of good quality also. Still looking for the Machiv guys review. they might be the same pipe probably. I wish I saw the 20% off Yamiya had last month! 1180$ .Oh well.

Davez134 · « **Reply #7 on:** June 05, 2015, 06:59:41 PM »

I've thought for a while that they are the same pipes. At one time machiv had a few of the same pictures as yamiya had.

Don R · « **Reply #8 on:** June 05, 2015, 08:05:59 PM »

I got a set of the no number pipes from machIV. I waited a few months to put them on due to shop obligations. I painted them inside with the Eastwood internal exhaust paint hoping to extend their life. They fit well, I put them on loosely, connected the rear coupler, snugged the footpeg bolt and then used a rolled up towell and a rubber mallet to encourage the 1 and 4 pipes to move back toward the engine a little. I've ridden a few miles with them but it's my sandcast bike and I'm planning no long trips.
I was assuming they were the same as yamiya but it didn't say that on the box or paperwork.

Don R · « **Reply #9 on:** June 05, 2015, 08:09:27 PM »

Pics on page 11 and 12

http://forums.sohc4.net/index.php/topic,59301.250.html

bender01 · « **Reply #10 on:** June 05, 2015, 10:28:43 PM »

Thanks Don R!

cakey · « **Reply #11 on:** June 06, 2015, 03:26:23 AM »

I bought the Yamiya no number pipes when they got released in June last year. Easy fit, look great, sound great and seem to be quite good quality. I rate them as a really good replacement.

Don R · « **Reply #12 on:** June 06, 2015, 10:28:32 AM »

Mine had a couple of small scratches in places where it won't show, overall I'd say the quality looks what I'd expect Honda to supply. The chrome is good but not like show quality high dollar chrome.
They were packed in expanding foam, bagged individually and separated in pairs by cardboard. All the bolts, nuts, washers, balance tubes, clamps, clamp screws and heat shields add to the cost.

PeWe · « **Reply #13 on:** June 06, 2015, 12:16:19 PM »

I ordered a set of 4-4 from Yamiya750 too. Quality look really good. I'm optimistic regarding the HM300 style when it comes to flow and tuned engine. I'll see if I need to remove the diffusers completely, damping wool around the diffusers cannot be good.

All other parts needed cost some extra, heat shields, rubber tubes, sidestand rubber protection, bolts, head adaptors... I even ordered a restored repainted center stand! I feel that I must take it back to how it look when I bought it :-)
The 4-4 plan triggered me to order IKON shocks with OEM chrome look when my red Marzocchi AG Strada shocks will look awful with 4-4.

I removed the 4-4 with everything with center stand and replaced it with a RC4-1 fastened with suts as the later K7 1980. Next 4-1 of similar design.
The 4-4 yet to be mounted.

Don R · « **Reply #14 on:** June 06, 2015, 04:23:58 PM »

When you buy the hose clamp the clamp's screw is a separate part number. The nut is integral. Crazy.

edwardmorris · « **Reply #15 on:** June 06, 2015, 06:02:52 PM »

Quote from: bender01 on June 05, 2015, 06:39:57 PM

................Chrome looks nice and thick! .............

I hate to inform you that is not the case with the yami repops. I have a set of the 300 repops from yamiya which at first glance look fine, chrome is all there to cover them up nicely, but it is nowhere near as thick or lustrous as NOS/OE pipes or even a decently rechromed set. I have a set of NOS 341s that outshine these by miles and they have a rock solid coat. I have a set of rechromed 341s that are comparable to the NOS ones in shine but still not quite as thick (but there's a long and unfortunate story behind their demise).

bender01 · « **Reply #16 on:** August 02, 2015, 02:53:38 PM »

Ive finally done it. I ordered them from David Silvers. They came in stock this week and he has 5 sets left. Ill post pics as soon as they get here. Fingers crossed on quality. 341 knock offs not 300s.

Stev-o · « **Reply #17 on:** August 02, 2015, 02:57:26 PM »

Quote from: bender01 on August 02, 2015, 02:53:38 PM

Ive finally done it. I ordered them from David Silvers. They came in stock this week and he has 5 sets left. Ill post pics as soon as they get here. Fingers crossed on quality. 341 knock offs not 300s.

Good to hear, I think you will be pleased.

greenjeans · « **Reply #18 on:** August 04, 2015, 05:42:09 AM »

I just received a box with the 341 knock-offs from DSS last night. Haven't installed yet, but the quality looks pretty darn good to me. The chrome may not be quite as deep as my original sets, but it isn't far off and I imagine once they are on there and polished, they will be fantastic. Curious to hear what they sound like.
I have one set of original 300s and another original set of 341s - the difference really is night and day.

For the price $965 + $17 to ship them, I don't think that we will ever have stock pipes at this price ever again. I will say that packing wasn't the best. They were individually wrapped in a single layer of bubble wrap within boxes identical to what Honda used to package them in and those 4 were within another box.
So, they can definitely wiggle around in transport. Mine arrived with the box dented/smashed on one end - although it really wasn't that bad. Fortunately, I didn't see anything alarming when I opened up the boxes.

I might try that Eastwood exhaust paint that Don mentioned. In the past, I've just poured some oil down them and swished it around before draining and installing. Smokes like a chimney for a while, but it adds some piece of mind.

bender01 · « **Reply #19 on:** August 04, 2015, 09:11:57 AM »

$1095 and 17 shipping here! Maybe my box won't be dented.

spiritof67 · « **Reply #20 on:** August 04, 2015, 02:20:31 PM »

Regarding the "sound"of these reproduced pipes, is it still practice to run a router through the internal baffle to reduce back pressure, or was that only possible with the OEM steel quality?

PeWe · « **Reply #21 on:** August 04, 2015, 02:31:54 PM »

I guess that Yamiya no numbers (300 replica) sounds louder than 341 replica, right? When running them without baffle.
300 have better flow, therefore larger baffle.
HM341 has just an endcap. 341 replicas look the same?

bender01 · « **Reply #22 on:** August 05, 2015, 04:42:49 PM »

Just beautiful. I cant be happier. It will be awhile before I get them on. I just had to have them. Now I can buy my other dream parts. I forgot the stamp but I think they say d il cb750341

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Author Topic: Yamiya 300 pipes? Anyone have them? (Read 3507 times)