GT550A top end woes

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jabcb
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Re: GT550A top end woes

Post by jabcb »

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

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vulcanman
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Re: GT550A top end woes

Post by vulcanman »

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
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Evans Ward
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Re: GT550A top end woes

Post by Evans Ward »

I watched a video of the Higgspeed 3-1 on a GT750. It sounds awesome and allows centerstand retention which is a huge bonus. :clap: 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:
1976 Suzuki GT750 (Maui Blue), 1972 Kawasaki H2 750 Mach IV (Candytone Blue), 1984 Yamaha RZ350 (KRR- Yellow/ Black).
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jabcb
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Re: GT550A top end woes

Post by jabcb »

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????
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
vulcanman
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Re: GT550A top end woes

Post by vulcanman »

Higgs usually post free for UK.no idea where you are? Centre std retention def a bonus.
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Alan H
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Re: GT550A top end woes

Post by Alan H »

jabcb wrote: Thu Mar 10, 2022 5:51 am Maximum GT550 looks/coolness options: 4LS with Jemco 3-into-1, Higgspeed 3-into-1 or Zenshin 1-2 cross chamber 3-into-3.
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.
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slosher
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Re: GT550A top end woes

Post by slosher »

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 :up:

Dave
vulcanman
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Re: GT550A top end woes

Post by vulcanman »

Yes Slosher.look good on the Advert.i be in queue soon.nice bend in downpipes to aid gases
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Re: GT550A top end woes

Post by vulcanman »

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.
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Alan H
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Re: GT550A top end woes

Post by Alan H »

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! :shock:
Think of how stupid the average person is, then realise that half of them are more stupid than that.
vulcanman
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Re: GT550A top end woes

Post by vulcanman »

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 😢
vulcanman
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Re: GT550A top end woes

Post by vulcanman »

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
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Alan H
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Re: GT550A top end woes

Post by Alan H »

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:
Think of how stupid the average person is, then realise that half of them are more stupid than that.
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jabcb
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Re: GT550A top end woes

Post by jabcb »

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
vulcanman
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Suzuki 2-Strokes: GT550A 1976

Re: GT550A top end woes

Post by vulcanman »

Ok Alan well if you dont end up tempting yourself id be grateful for a message about the Piper.
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