Suzuki2Strokes.com

Sundial Moto Sports

Suzuki Two-Stroke Message Board
Suzuki2Strokes.com
It is currently Thu Jan 23, 2020 9:18 am

All times are UTC - 6 hours




Post new topic Reply to topic  [ 41 posts ]  Go to page Previous  1, 2, 3
Author Message
 Post subject: Re: GT550 3 into 1
PostPosted: Sun Nov 10, 2019 11:43 am 
Offline
Expert racer

Joined: Mon Dec 01, 2008 2:52 am
Posts: 1203
Location: Manchester, UK
That looks super-cool with the Jemco.

Nearly 15 years ago now, but I contacted ZenShin and the price for a 3-1 for my 380 including shipping was pretty reasonable, the whole cost was about two-thirds of a price of a set of new AllSpeeds at the time.

Then I got lucky and found a period Piper 3-1 which sounded incredible. I took the bike to a local bike show, and when I was leaving, EVERYONE stopped and stared when I fired it up. A 10-year-old kid came up to me and said "Wow, what kind of engine is that?" :twisted: :lol:

But it stopped the bike revving at 7,000 as if it had hit a rev limiter. So I sold it and found some period J&R Power Pipe chambers, which added power right through the range.

_________________
1976 GT380 - wounded by me, and sold on
2006 SV650S - killed by a patch of diesel and a kerb in Feb 2019
2017 SV650 AL7 - naked and unashamed


Top
 Profile  
 
 Post subject: Re: GT550 3 into 1
PostPosted: Sun Nov 10, 2019 12:26 pm 
Offline
On the main road
User avatar

Joined: Mon Oct 24, 2016 12:35 pm
Posts: 181
Location: Macon, GA
Country: USA
Bikes owned: 76 GT750, 72 H2 750, 84 RZ350, 67 YR1, 82 MB5
Here’s a pic of my JEMCO 3-1 on my GT750A. I elected to have mine chromed and it sounds fantastic! Pulls harder off idle and revs higher than I expected too. The added bonus is the weight savings over the stock 3-4 pipes. Has to be at least 30 lbs savings. I don’t know if I could do a long ride with the increased volume of sound without ear plugs though.... I also did the air jets too when carbs were off for rejecting. Big thank you to teaser for the jetting specs which seem spot on. With this pipe, it sounds like an F1 car at full wail.
Attachment:
34FB708B-4098-4D5F-A1A6-9B17CC81D2BF.jpeg
34FB708B-4098-4D5F-A1A6-9B17CC81D2BF.jpeg [ 121 KiB | Viewed 612 times ]

_________________
1976 Suzuki GT750 (Maui Blue), 1972 Kawasaki H2 750 Mach IV (Candytone Blue), 1984 Yamaha RZ350 (KRR- Yellow/ Black).


Top
 Profile  
 
 Post subject: Re: GT550 3 into 1
PostPosted: Mon Nov 11, 2019 5:23 pm 
Offline
Expert racer

Joined: Tue May 18, 2010 5:38 pm
Posts: 1466
Location: New Hampshire
Country: USA
Bikes owned: Suz, Yam, Honda, Kaw.
jabcb wrote:
Would like to see pics of those Zen Shin 3-into-1. Also, how/where did you buy them?


They have a few kinds for GT750 and this one interested me. I will try and take a pic of it on my bike with tape measure along side in pic so we can guess dimensions, next weekend and I put them away for the season. Same with GT550.

I think if you look at your Jemco 3 into 1 and compare you will see the overall tuned length on Zen Shin is inches shorter I think.

Image.

https://ibb.co/vLYF21B

I bought it from ->

https://www.motoparts-online.com/

Now I look at emails with them it was $1099(?$999?) plus $350 Shipping quote. They were Sketchy at communication and thought for sure I was screwed ones I paid via Paypal plus 8% transaction fee. But It came after some weeks and packed well in a Zen Shin labelled box.

Zen Shin makes this lovely one for GT380 and judging by its looks, it should perform well.

https://www.croooober.com/en/item/bpart ... otato-Tube

I think if I could figure out various Japanese Auction sites It would cost less to buy, but motoparts-online did get it for me OK.

_________________
Current Bikes
74 GT250 (T350 upgrade),
76 GT250 (T350 upgrade),
71 T350,
70 T350,
74 GT380,
75 T500,
73 GT550,
75 GT750,
72 Yamaha DS7 (R5 upgrade),
77 Yamaha RD400 (Daytona Cyls),


Top
 Profile  
 
 Post subject: Re: GT550 3 into 1
PostPosted: Sat Nov 16, 2019 3:13 pm 
Offline
Expert racer

Joined: Tue May 18, 2010 5:38 pm
Posts: 1466
Location: New Hampshire
Country: USA
Bikes owned: Suz, Yam, Honda, Kaw.
As promised 8)

Strater 3 into 1 GT550 -> Hmmm, Omar/Jemco may have copied this design best they could

https://ibb.co/sKVGK6t

GT550 3 into 3: Ocelot (in front) vs (J&L or Bassani... I was told latter when bought but not sure). Previously I used a string to figure "Tuned" length and Ocelot about 8 inches shorter as discussed earlier in post is a nice tune ->

https://ibb.co/jHpzBqj


GT750 Zen Shin "Black" 3 into 1 with Chamber section -> Looked to be a shorter tuned length vs Omar's (Stater?) as I was looking for why I bought it.

https://ibb.co/GP8P6BP

_________________
Current Bikes
74 GT250 (T350 upgrade),
76 GT250 (T350 upgrade),
71 T350,
70 T350,
74 GT380,
75 T500,
73 GT550,
75 GT750,
72 Yamaha DS7 (R5 upgrade),
77 Yamaha RD400 (Daytona Cyls),


Top
 Profile  
 
 Post subject: Re: GT550 3 into 1
PostPosted: Sat Nov 16, 2019 7:30 pm 
Offline
Moto GP
User avatar

Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3489
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
Interesting. I don’t know enough about expansion chamber tech to have insight into the different designs.
But it looks like the Zen Shin “early fat” design cuts into ground clearance a bit too much for Pennsylvania roads.

_________________
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE


Top
 Profile  
 
 Post subject: Re: GT550 3 into 1
PostPosted: Sun Nov 17, 2019 7:04 pm 
Offline
Expert racer

Joined: Tue May 18, 2010 5:38 pm
Posts: 1466
Location: New Hampshire
Country: USA
Bikes owned: Suz, Yam, Honda, Kaw.
I think I
jabcb wrote:
don’t know enough about expansion chamber


I sure wish I had the skill to fabricate them, still need to keep my day job.

I have have done research and now that I have tried several designs things are making sense and repeatable for me. Tuned" length is one of those fundamental decisions in a pipe design objective one can understand and experience.

For a specific goal, reason states a 3 into 3 should give better performance than a 3 into 1. What I have learned, it is not true that 3 into 1s are low end only and you will loose upper RPM on a stock or mildly tuned street bike. That can be true for a 3 into 3 design as well. It's all what you want and with some basic understanding you can get it - if you can find it or make it yourself. I rely on the former.

_________________
Current Bikes
74 GT250 (T350 upgrade),
76 GT250 (T350 upgrade),
71 T350,
70 T350,
74 GT380,
75 T500,
73 GT550,
75 GT750,
72 Yamaha DS7 (R5 upgrade),
77 Yamaha RD400 (Daytona Cyls),


Top
 Profile  
 
 Post subject: Re: GT550 3 into 1
PostPosted: Sun Nov 17, 2019 7:44 pm 
Offline
Moto GP
User avatar

Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3489
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
Looks, sound, cornering clearance & the desire for a center stand are also factors.

Some of the Higgspeed 3-into-3 exhausts are compatible with a centerstand.
The stock exhausts are contoured for the stands. Cornering clearance at the side stand can be a problem with some of the 3-into-3.
The Higgspeed 3-into-3 on my GT380 are REALLY LOUD.

Looks are obviously subjective. For maximum coolness, I like the 3-into-1 & 4LS front brake.

_________________
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE


Top
 Profile  
 
 Post subject: Re: GT550 3 into 1
PostPosted: Mon Nov 18, 2019 3:17 am 
Offline
Expert racer

Joined: Mon Dec 01, 2008 2:52 am
Posts: 1203
Location: Manchester, UK
jabcb wrote:
The Higgspeed 3-into-3 on my GT380 are REALLY LOUD.


The J&R chambers on my 380 were LOUD too, until I did a 'sandwich' wrapping around the baffle tubes of a layer of wire wool, then a very tight layer of dirt bike silencer wadding, all wired into place. This left the musical tones untouched, but took away the buzz-saw edge to the sound.

_________________
1976 GT380 - wounded by me, and sold on
2006 SV650S - killed by a patch of diesel and a kerb in Feb 2019
2017 SV650 AL7 - naked and unashamed


Top
 Profile  
 
 Post subject: Re: GT550 3 into 1
PostPosted: Mon Nov 18, 2019 11:16 am 
Offline
Moto GP
User avatar

Joined: Mon Nov 03, 2008 10:47 am
Posts: 6084
Location: Illinois
Vintageman wrote:
As promised 8)
...



That 'Strater is not a STRADER as made by Walt Strader. Strader used individual head pipes and the collector is welded to the chamber. What I don't know is if it is miss labeled or if there's actually a STRATER pipe out there.

There are many issues with a 3 into 1 and the main one is that pulses arrive at the wrong time. That's one reason that Sled 3 into 1 pipes always used really short headers to minimize that effect. Yes length and volume have an impact and that needs to be tailored to exhaust duration and projected peak power.

All that aside, a 3 into 1 on a Suzuki to my ears sounds much better than most or maybe all 3 into 3 pipes. They don't make as much power but the sound makes up for that. I have a Strader and a Jemco and they both sound really good.


Top
 Profile  
 
 Post subject: Re: GT550 3 into 1
PostPosted: Wed Dec 11, 2019 6:37 pm 
Offline
Expert racer

Joined: Tue May 18, 2010 5:38 pm
Posts: 1466
Location: New Hampshire
Country: USA
Bikes owned: Suz, Yam, Honda, Kaw.
tz375 wrote:
That 'Strater is not a STRADER as made by Walt Strader. Strader used individual head pipes and the collector is welded to the chamber.


Thanks for the info. I actually may have forgotten what the guy on ebay called it. It was a name I heard before and thought Strater or Strader, purchase history is loss, so may be wrong. Via this post It looks very similar to Omar's as stated, but I think the 3 into 1 collection point in a tad different. I'll try to get a close up of that area and exhaust outlet so maybe someone can compare for me. Maybe it is just a chromed Omar. It had thick dust and minor rust pitting so from patina looked older, but that of course depends how it was stored.

_________________
Current Bikes
74 GT250 (T350 upgrade),
76 GT250 (T350 upgrade),
71 T350,
70 T350,
74 GT380,
75 T500,
73 GT550,
75 GT750,
72 Yamaha DS7 (R5 upgrade),
77 Yamaha RD400 (Daytona Cyls),


Top
 Profile  
 
 Post subject: Re: GT550 3 into 1
PostPosted: Mon Jan 20, 2020 11:16 am 
Offline
Moto GP
User avatar

Joined: Mon Nov 03, 2008 10:47 am
Posts: 6084
Location: Illinois
You are right. The seller may have just misspelled the name based on what he thought it was.

I went back and looked at all the pics I have harvested over the years and can't find another one of that pipe you posted as a Strater. Strader used individual down pipes on all the 550 and 750 pipes I have see, but it's always possible that his earlier, or later, pipes might have been a different design.

It's academic, but might be nice to know the story behind that pipe.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 41 posts ]  Go to page Previous  1, 2, 3

All times are UTC - 6 hours


Who is online

Users browsing this forum: No registered users and 13 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group
Sundial Moto Sports forum © by Eric F. Kalamaja
Suzuki2Strokes.com