’88 Suzuki GSX-R1100 Racer – BikeBound


Slabside GSXR1100

Street-Authorized Racer: Haxch Moto’s Ex-TT GSX-R… 

When Suzuki launched the unique GSX-R in 1984, it was a revolution in sport bikes — the closest factor to a racebike with lights ever to emerge from the Japanese Massive 4. The aluminum-framed machine was almost 20% lighter than its rivals, and carried out like a fugitive straight from the racing paddock:

“The brand new GSX-R isn’t a race-only bike, nevertheless it’s shut. That’s a part of the GSX-R manifesto: to design racebikes, after which adapt them to the road, moderately than vice versa, because the case typically was.” –Cycle World

Suzuki GSXR1100 Slabside

The unique GSX-R400 — solely accessible in Japan — was rapidly adopted by the GSX-R750 in ’85 and the GSX-R1100 in ’86. These first-gen machines rapidly earned the nickname “Slabside” or “Slabby” for the big slabs of plastic under the seats, creating a cult following that continues to today.

Slabside 750 and 1100 Photograph: Visordown

 

The GSX-R1100 mixed the various improvements of the 750 with big-bore energy, making 130 bhp and 76 lb-ft of torque within the final ’88 J mannequin — final of the Slabbies earlier than the introduction of the second-gen Slingshot.

Suzuki GSX-R1100 Slabside

Lately, we acquired in contact with Marc Bell of London’s Haxch Moto — a furnishings designer, fabricator, and racer with a love for Japanese sport bikes of the late 80s and early 90s. Two years in the past, after a excessive facet on his Yamaha R6 at Cadwell Park landed him in Hull Royal Infirmary, he determined to get again to his roots:

“Not being a fan of injected bikes or hospital, I made a decision to comply with what I really love about bikes and are available again subsequent 12 months to race basic bikes.”

Suzuki GSX-R1100 Slabside

After choosing up the 1988 GSX-R1100J you see right here, he made some very thrilling discoveries:

“I stripped the bike again and located some good body and swingarm bracing, and in addition scrutineering stickers from the Manx GP, that means the bike had been beforehand raced on the Traditional TT — fairly thrilling as I’ve adopted the TT since childhood and have been over to observe each the TT and Traditional TT in 2019.”

Slabside GSXR1100

Marc got down to construct a street-legal racer able to competing within the Traditional Racing Bike Membership (CMRC)…with an eye fixed towards someday returning to the Isle of Man to race the Traditional TT. The TT engine had been swapped out for the standard highway mill, however a flurry of upgrades — Mikuni flat slides, Yoshimura Cyclone exhaust, reground cams with heavy-duty valve springs, and extra — yielded 131 whp on the dyno.

Suzuki GSX-R1100 Slabside

Marc went full-bore from an aesthetics angle, too, designing and fabricating the aluminum tail part and outfitting the bike with a road-legal uneven endurance headlight:

“Look smart I wished the bike to appear like a correct basic 80’s race bike, pretty much as good when it comes to high quality because the manufacturing unit groups of the day.”

Suzuki GSX-R1100 Slabside

After three trackdays at Snetterton, Marc had the Öhlins rear shock and GSX-R750 SRAD entrance finish dialed in for quick, predictable dealing with. Although he found the newer entrance finish would disallowed the bike for CMRC racing, the Slabby is authorized to compete within the pre-injected “Thunderbike Extremely” collection with Marc’s native racing membership, and he hopes to convey the large air/oil-cooled Gixxer for a run across the Nürburgring this summer season.

Suzuki GSX-R1100 Slabside

This season, Marc may have his palms full racing his FZ600 — the primary spherical is that this coming weekend — and he’s additionally simply wrapped a brand new GSX-R1000 “Slabshot” construct, which we hope to showcase quickly.

Under, Marc provides us the complete story on the construct in his personal phrases, together with extra photographs courtesy of photographers Roberto Garagarza and Harry Blaise Fryer.

1100 Slabside: Within the Builder’s Phrases…

Suzuki GSX-R1100 Slabside
• Please inform us about your self and Haxch.

I’ve all the time been into late 80’s / early 90’s bikes, Japanese sports activities bikes. My first highway bike was an immaculate Nc30 VFR400, which I went on to race after binning it at a trackway and rebuilding it as a monitor bike. I additionally had the CBR400, a Slingshot 750, CBR900, and doubtless some others I’ve forgotten. I’d all the time been on the look out for a Slabby and when the possibility got here I jumped at it!

Suzuki GSXR1100

Haxch is my fabrication workshop primarily based in London the place I make a lot of excessive finish furnishings, together with metalwork fabrications for interiors, designers, architects, and artists. I began off as a furnishings designer myself and through the years taught myself the talents to weld and make issues for different individuals, so have the attention nonetheless for proportions and styling.

Suzuki GSXR1100

• What’s the make, mannequin, and 12 months of the donor bike?

Suzuki GSX-R1100, 1988 J mannequin.

Suzuki GSXR1100

• Please inform us in regards to the construct.

Two years in the past I had an enormous huge highside at Cadwell Park whereas racing an R6, final lap of the final race, and ended up being airlifted to Hull hospital with suspected inner bleeding. Not being a fan of injected bikes or hospital, I made a decision to comply with what I really love about bikes and are available again subsequent 12 months to race basic bikes.

Suzuki GSXR1100

Not lengthy after the crash whereas laying up, I noticed a pleasant Slabside that wasn’t inventory and had potential for a construct; I didn’t wish to begin with a pleasant inventory instance. I went to go to the man, favored the look of it, and provided a straight swap for my CBR900, which noticed me returning with the GSX-R1100 within the van and googling which class I may sneak it into.

Suzuki GSXR1100

I stripped the bike again and located some good body and swingarm bracing, and in addition scrutineering stickers from the Manx GP, that means the bike had been beforehand raced on the Traditional TT — fairly thrilling as I’ve adopted the TT since childhood and have been over to observe each the TT and Traditional TT in 2019.

Suzuki GSX-R1100 Slabside

Discovering this historical past gave me the dream to get the bike and myself again to the island someday and race it once more within the Traditional TT, a objective which can take a number of work from my facet and a little bit of luck too — in all probability 3-4 years realistically, nevertheless it’s doable and could be a fantastic dream to attain.

Suzuki GSXR1100

Regardless of the bike being on the TT, after we caught the bike on the dyno it was solely making 116 HP, so the TT engine will need to have been eliminated and changed with a normal highway engine. The meant the primary activity was to get this determine up.

GSXR1100

We began with a brand new set of Mikuni RS38 flat slides with 30mm Mikuni bellmouths and a Yoshimura Cyclone full system — this gained just a few HP however not sufficient. We then reground the cams for increased carry, fitted heavy responsibility valve springs, ignition advancer, and EBC clutch with heavy-duty springs and a good looking billet aluminium high finish oil cooling equipment from Grumpy 1260. That each one did the trick and acquired it as much as 131 HP!

Suzuki GSXR1100

For dealing with the bike has Öhlins rear and SRAD 750 entrance finish, though the primary monitor session it was seesawing mid nook — this was then fine-tuned and now rides properly. Earlier than the construct I did three periods at Snetterton, then acquired lined in oil from the highest finish, so not an enormous check however sufficient to get an thought of the way it rides.

Suzuki GSXR1100

Look smart I wished the bike to appear like a correct basic 80’s race bike, pretty much as good when it comes to high quality because the manufacturing unit groups of the day. Lots of people say there’s no level making a membership racing bike look good because it’ll be down the highway quickly sufficient, however I don’t wish to race one thing that I don’t just like the look of, so meant to go all out.

GSXR1100

It’s as necessary to me for the bike to look the half in addition to experience nicely and was all the time my dream to personal / construct a motorcycle to that degree. Perhaps the design background and furnishings making has made me specific about kind and end, however that’s what I wished from the construct.

Suzuki GSXR1100

For proportions I attempted the inventory fibreglass tail part. Nevertheless, it simply didn’t look proper, so I got down to design and construct my very own, beginning with a number of cardboard fashions to mock up the shape, then flattening these to attract the online up in Auto CAD in order that I may laser-cut the panels in 1.5mm aluminum. I then formed these with the bead curler and welded them as much as make the ultimate kind.

Suzuki GSXR1100

The one-sided endurance mild was added for seems to be but additionally to make the bike highway authorized so I can use it between monitor periods for a Sunday blast on the twisties. I wished to have the ability to use it year-round and never simply restricted to trace. The plan is to take it to the Nurburgring in August and for that you simply want a highway authorized bike, so there’s one other incentive!

GSXR1100

Paint job once more was designed to duplicate the previous 80’s bikes of the day however with out being overly sophisticated. I’ve seen individuals making builds from slabbies not too long ago and making an attempt wacky color schemes and I simply don’t get it. It was basic all the way in which for this one, and will probably be basic on the subsequent.

Suzuki GSXR1100

Different upgrades embrace a Scitsu racing tacho (made in Sheffield), steering damper, Brembo discs, customized stainless display brace, oil cooler with CNC aluminium bracket from Grumpy 1260, braided strains, braced body and swingarm, and on the way in which from South Africa some rear units made by ACC, once more in billet aluminum.

Suzuki GSXR1100

Midway via the construct I found the CMRC (Traditional Racing Bike Membership within the UK) wouldn’t settle for my bike due to the SRAD 750 entrance finish, so I’ll return to my previous membership and race within the pre-injected collection known as Thunderbike Extremely — this has a power-to-weight ratio to maintain issues extra even, however nonetheless I’ll have a tricky problem towards the first-gen R1’s!

Suzuki GSXR1100
Scorching off the monitor…

• Are you able to inform us what it’s prefer to experience?

It’s nice to experience. Flat-slide carbs imply direct responsive energy when it’s in control on monitor — not so nice spherical city and in visitors in comparison with CV carbs as a result of nature of the design, however completely manageable and value it for the additional HP.

 

GSXR1100

Dealing with wasn’t nice initially however after three trackdays I had it dialed in properly and will begin to push on a bit extra. They’re previous heavy bikes it doesn’t matter what you do with them, however this one will certainly carry out higher than a stocker!

GSXR1100
• Did you make it to the Nürburgring but — in that case, how’d it go?

Sadly I’ve not but made it to the Nurburgring, work and life acquired in the way in which. Nevertheless, there are discussions and plans being made for me a highway journey over there this summer season — fingers crossed we make it!

GSXR1100

The plan this 12 months is to race an FZ600 with CRMC (Traditional Racing Bike Membership). The primary spherical is that this weekend — not even completed prepping the bike but! Will let you understand how it goes!

GSXR1100

Images Credit

Observe the Builder / Racer

Net: haxch.co.uk | haxchmoto.com (below development)
Instagram: @haxchmoto