GT550A top end woes
Moderators: oldjapanesebikes, H2RICK, diamondj, Suzsmokeyallan
- jabcb
- Moto GP
- Posts: 4251
- Joined: Mon Dec 13, 2010 4:32 pm
- Country: USA
- Suzuki 2-Strokes: 69 T350 thru 75 GT750
- Location: southwestern Pennsylvania
Re: GT550A top end woes
The Jemco 3-into-1 on my GT750 made the bottom end a lot stronger.
The middle “expansion-section” of the Jemco & Higgspeed pipes look different. So I’m wondering how that impacts performance.
The middle “expansion-section” of the Jemco & Higgspeed pipes look different. So I’m wondering how that impacts performance.
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
-
- To the on ramp
- Posts: 346
- Joined: Sun Mar 07, 2021 2:32 pm
- Country: United Kingdom
- Suzuki 2-Strokes: GT550A 1976
Re: GT550A top end woes
Mine kettle was stronger too up to about 80 mph ish but would taip off earlier than std pipes.think Higgs 3 into 1 will be much the same ? I let you know one day
- Evans Ward
- To the on ramp
- Posts: 326
- Joined: Mon Oct 24, 2016 12:35 pm
- Country: USA
- Suzuki 2-Strokes: 76 GT750, 72 H2 750, 84 RZ350
- Location: Macon, GA. USA
Re: GT550A top end woes
I watched a video of the Higgspeed 3-1 on a GT750. It sounds awesome and allows centerstand retention which is a huge bonus.
The mid and end section looks much smaller in diameter than the JEMCO like I have on my GT750. I’m working on mocking up a centerstand that will work with the JEMCO and will take to my welder once I have all the parts fitted like it should. ![up :up:](./images/smilies/icon_thumbup.gif)
![clap :clap:](./images/smilies/icon_clap.gif)
![up :up:](./images/smilies/icon_thumbup.gif)
1976 Suzuki GT750 (Maui Blue), 1972 Kawasaki H2 750 Mach IV (Candytone Blue), 1984 Yamaha RZ350 (KRR- Yellow/ Black).
- jabcb
- Moto GP
- Posts: 4251
- Joined: Mon Dec 13, 2010 4:32 pm
- Country: USA
- Suzuki 2-Strokes: 69 T350 thru 75 GT750
- Location: southwestern Pennsylvania
Re: GT550A top end woes
Maximum GT550 looks/coolness options: 4LS with Jemco 3-into-1, Higgspeed 3-into-1 or Zenshin 1-2 cross chamber 3-into-3.
Ouch, those Zenshin are expensive at $1,500 + shipping. The Higgspeed are $800 + shipping. Don’t know what the current Jemco pricing is.
I had wanted the Jemcos for the 72 GT550 cafe build but Jemco was closed at the time.
The restart of Jemco & the availability of the Higgspeeds has me thinking about it again:
Jemco nickel-plated vs Higgspeed polished SS vs PITA shipping from Japan????
Ouch, those Zenshin are expensive at $1,500 + shipping. The Higgspeed are $800 + shipping. Don’t know what the current Jemco pricing is.
I had wanted the Jemcos for the 72 GT550 cafe build but Jemco was closed at the time.
The restart of Jemco & the availability of the Higgspeeds has me thinking about it again:
Jemco nickel-plated vs Higgspeed polished SS vs PITA shipping from Japan????
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
-
- To the on ramp
- Posts: 346
- Joined: Sun Mar 07, 2021 2:32 pm
- Country: United Kingdom
- Suzuki 2-Strokes: GT550A 1976
Re: GT550A top end woes
Higgs usually post free for UK.no idea where you are? Centre std retention def a bonus.
- Alan H
- Moto GP
- Posts: 3182
- Joined: Thu Feb 16, 2012 11:50 am
- Country: England
- Suzuki 2-Strokes: 4 x GT550s - J, M, A, B.
- Location: The Republic of South Yorkshire
Re: GT550A top end woes
Oh, my 550A 'Earwig' with Abbeyspeed spannies, GS550 wheels & 3 discs suits me. The (almost) standard J 'Yeti' rides nice too.
Think of how stupid the average person is, then realise that half of them are more stupid than that.
- slosher
- On the street
- Posts: 18
- Joined: Wed Nov 24, 2021 12:28 pm
- Country: United Kingdom
- Suzuki 2-Strokes: GT750L & GT550L T140V & TL1000 97s
- Location: Walsall UK
Re: GT550A top end woes
Higgspeed are offering a 3-1 pipe for the 550 in S/steel emailed Paul the other week and having a look at what he can offer at Stafford next month the 3-1 looks like it has the round bend header pipes too
Dave
![up :up:](./images/smilies/icon_thumbup.gif)
Dave
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- To the on ramp
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- Joined: Sun Mar 07, 2021 2:32 pm
- Country: United Kingdom
- Suzuki 2-Strokes: GT550A 1976
Re: GT550A top end woes
Yes Slosher.look good on the Advert.i be in queue soon.nice bend in downpipes to aid gases
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- To the on ramp
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- Joined: Sun Mar 07, 2021 2:32 pm
- Country: United Kingdom
- Suzuki 2-Strokes: GT550A 1976
Re: GT550A top end woes
Eve Slosher and all,been bit quiet as due to a 6th nerve eye palsy my licence is about to depart for 6 months .i have 100% double vision so no riding.just as sun landed .mates been great giving me lifts,cant really see well to do owt bike related so just having to rest the eye.only treatment is eye patches and prism lenses on my left side of glasses which only work if you keep very still.hope recovery sooner rather than later.im still reading on here most days.
- Alan H
- Moto GP
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- Joined: Thu Feb 16, 2012 11:50 am
- Country: England
- Suzuki 2-Strokes: 4 x GT550s - J, M, A, B.
- Location: The Republic of South Yorkshire
Re: GT550A top end woes
Best of luck with getting it right. I think in your case I'd be giving riding/driving up (hopefully short term) anyway. A mate of mine had to pack his job in many years ago with macular degeneration. Not good when you're a bus driver! ![Shocked :shock:](./images/smilies/icon_eek.gif)
![Shocked :shock:](./images/smilies/icon_eek.gif)
Think of how stupid the average person is, then realise that half of them are more stupid than that.
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- To the on ramp
- Posts: 346
- Joined: Sun Mar 07, 2021 2:32 pm
- Country: United Kingdom
- Suzuki 2-Strokes: GT550A 1976
Re: GT550A top end woes
Thank you Alan,not giving up yet although not riding/driving for now in the hope it eases & comes right in the 3 to 6 months estimated
.if it doesnt yes there be a couple bikes up for sale![😢](//twemoji.maxcdn.com/2/svg/1f622.svg)
.if it doesnt yes there be a couple bikes up for sale
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- To the on ramp
- Posts: 346
- Joined: Sun Mar 07, 2021 2:32 pm
- Country: United Kingdom
- Suzuki 2-Strokes: GT550A 1976
Re: GT550A top end woes
Afternoon Alan ,daft question but no sign oc your Piper for the 550 ever coming back to you? I know Higgs doing one now which i will go for once back on road but prefer Piper
- Alan H
- Moto GP
- Posts: 3182
- Joined: Thu Feb 16, 2012 11:50 am
- Country: England
- Suzuki 2-Strokes: 4 x GT550s - J, M, A, B.
- Location: The Republic of South Yorkshire
Re: GT550A top end woes
Possibly, but I've been offered a 'project' 550 and need to try and talk myself out of it.......
Trouble is, I've still got quite a few 550 spares and a Dunstall body kit stashed.......![ssh :ssh:](./images/smilies/icon_shh.gif)
Trouble is, I've still got quite a few 550 spares and a Dunstall body kit stashed.......
![ssh :ssh:](./images/smilies/icon_shh.gif)
Think of how stupid the average person is, then realise that half of them are more stupid than that.
- jabcb
- Moto GP
- Posts: 4251
- Joined: Mon Dec 13, 2010 4:32 pm
- Country: USA
- Suzuki 2-Strokes: 69 T350 thru 75 GT750
- Location: southwestern Pennsylvania
Re: GT550A top end woes
Think of it as saving another GT550 from being parted out.
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
-
- To the on ramp
- Posts: 346
- Joined: Sun Mar 07, 2021 2:32 pm
- Country: United Kingdom
- Suzuki 2-Strokes: GT550A 1976
Re: GT550A top end woes
Ok Alan well if you dont end up tempting yourself id be grateful for a message about the Piper.