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Graham's Katana Project
I have had bikes since I was 18, the first being a Suzuki GT 550 back in 1975. And at the last count 21 bikes in all. I have altered some of them at times in some way or another. But the first real street fighter type was back in 1986. It was a Suzuki GS 750, which I mono shocked the back end, fitted 850 barrels & pistons, GSX 1100 tank, GPZ bikini fairing with twin spots, single seat and GS 1000 forks. But the one bike I always wanted was Katana but never got one. Four years ago I rebuilt a rusty old Suzuki GT 550 I was given by a mate into a street fighter with Yamaha running gear, Suzuki katana tank and gsxr 1100 single seat, just to pass the cold winter months away. That was when I decided I wanted to build that katana I never got, but in street fighter mode. So last August while laid up with a bad back for 5 weeks with only street fighters mags to keep me going. I got on the phone to straightline racing and ordered a katana 1100 frame complete with logbook and tank, as this was going to be the basis for my project. Next up was the single sided swinging arm, a phone call to hondaparts.co.uk with the dimensions resulted in a NC30 swinger being the closest fit at 10mm narrower than the gap between the frame swing arm pivot points.

I remember the wife having to drag the box onto the front lawn and open it, so I could see the contents from our bedroom window, which was a complete back end of a Honda NC30, as I was not fully up and about yet. When finally up and about, I needed a new spindle and bushes / spacers making to suit the swing arm bearings and 16mm spindle as the Honda had a 20mm spindle. This was done by Graham engineering which is local to me, and it all fitted exactly and central in the frame, I had a real piece of luck though with the bottom suspension link mounting, As it lined up perfectly with the main stand mountings just having to trim down the right hand side plates on each pair of lugs. I made a top mounting bracket and welded a ¼ “ bracket on the under side of the frame to bolt this to, and with the use of spacer blocks I have got some up and down height adjustment if needed. I also got a bandit 1200 shock of ebay, which looks like new. With the rear end sorted I now needed a front end, and while looking through my local add mags there was a complete front end of a gsxr for sale, which I snapped up, billet yokes and all. The lad who sold them was only, Chris the lad who had the boiled egg kettle in your mag 5 or 6 years back.

Anyway these went straight in also with only a larger outer diameter bottom taper bearing needed, bit of luck that, no fucking about with the stem or anything.

At this time an article in your mag on the pro’s & cons of ebay was very timely as this was were I was to source the remaining items for the project, a GSXR 750 H motor in frame with log book, the carbs were also off ebay and I have jetted then up to 127.5’s to take into account of the K&N filters and more breathable exhaust. I made up some engine mounting plates in 5mm alloy plate and on the second set was happy with the positioning of the engine, (on the rebuild I made s/steel plates as these are stronger and polished up really good). But now I would need an exhaust just to make sure it all fitted and was ok. So back to ebay and a practically brand new motad nexus complete system with stainless down pipes was won. This went on ok once the cross tube on front down tubes was removed. To keep the stiffness in the down tubes I have put 2x10mm s/steel tubes with 2x8mm thread bar all the way across the front down tubes where the engine mountings are and pulled it all together to stiffen then back up again. It was always my intention to have an under/in seat system, so the silencer was cut of as was the collector section and a piece of 2” pipe, cut and lobster back welded to shape as a template, for exhaust you fix in Darlington to bend a proper piece of 2” stainless exhaust pipe to link from collector pipe to silencer in the rear seat section, exiting out the back part of the single seat unit were the light would have been. The seat unit is off a Honda NC35 and is a racing seat which I have reinforced with extra layers a fibreglass on the under side as they are a bit flexible if you don’t. I also layered up the seat base with 4 layers fibreglass and had it covered in red at a local auto-trimming firm. The seat and a set of racing rear sets were bought of the bloke who sells racing spares at Caldwell Park. I made up some foot rest mounting studs and positioned then through the frame exactly were I wanted them and welded them into place to bolt the rear sets to.

I also cut, pulled up and reweld the rear section of the frame to allow for the seat and under tray to be mounted. The fairing is a fibre glass pattern item from skidmarks as I wanted to fill in the front as I wasn’t going to have any lights on the bike, but as you can see the 2 little spots from motor world looked really small and I thought they would look really cool so I moulded them into the fairing, I have made the bracket coming from the head stock and mounted a plate onto that, which the lights bolt on to separately, so the fairing comes off while the lights stay in place, makes life a lot easier when wiring every thing up. Also while in motor world I got an electronic rev counter which is also mounted in the side lip of the fairing. The screen is a cut down katana item from powerbronze. I have altered the original wiring loom etc, as there are no indicators, the rear light is an alien type from M&P as are the flat drag bars in s/steel. Controls are a NC30 push/pull throttle, and cables, which I have shortened to suit. I decided that I wanted brembo gold line brake and clutch master cylinders and 4 pot callipers for the bike so back to ebay again, where I managed to win some at a price I was happy with and everything a wanted. I knocked up some mounting plates from 3 layers of 5mm alloy plate sandwiched together with glue; the callipers bolt to them and then to the fork legs. I made up all the braided lines myself getting all I needed from Cleveland flexible engineering. The switches are little chrome things from vehicle wiring products that advertise in all the mags. A quote from a local spray shop for the hole bike of £1300 made the decision to spray it my self easy, a lad at work had some spraying equipment I could borrow so all I needed was some where to do it! As my garage has now got 3 bikes in it , I decided to put a metal 10x8 ft workshop in the corner of my garden complete with electric’s and heater. Once the dry fit was completed, the bike fired up straight away, and after a ride up and down the drive a couple of times, it was time to strip the thing down again for a full refurbishment of all the parts etc. The frame, swing arm and wheels went to romax at Stockton to be powder coated in candy red, the frame and candy red over silver on the wheels and swinging arm and other brackets etc, for £200.

With these parts done I set about cleaning of the engine and giving it a coat or 2 of PJ1 engine paint. With the engine back in the rolling chassis which I had already put back together, with some Bridgestone 010 tyres fitted to its wheels. I fitted some billet alloy cam to cam links with crash bungs of ebay of cause to the engine. It was then time to start polishing the engine casings etc. Then a call to B&C express to sort out the chain and sprocket set with engine sprocket to suit GSXR motor and rear sprocket to suit NC30 wheel plus chain, this was no problem for them at all. And using the old sprocket cut down as a spacer and put behind the other sprocket give me perfect alignment to the gearbox sprocket. I wasn’t happy with the very wide original oil cooler, as it was to wide to fit in between the fairing lower sides were I wanted it to go. So a call to BSR aerotek sorted out the problem with a nice new 19 row earls cooler, some hose and fittings to allow me to make my own length of hoses to suit were I was mounting the cooler, this all worked out a treat and fitting very nicely between the fairing sides.

Now with the bike back together again it was time to fire it up once again just to make sure everything was ok. It was apart from the clutch slave cylinder leaking , so back on abay to get another one, which is of a later bandit.

Now it was time for the big job, spraying the thing. I got all the paint etc from John Davy in Middlesbrough, and in total cost about £200 not a bad saving I think. The graphics I have used are from Morgan designs and is ravie font as is the number plate lettering. The colours are Suzuki silver and an Italian red metallic base coats and a good few layers of 1 pack lacquer to top it of, which when fully hardened will be flatted of and polished up. Although not on the road yet due to the weather it runs well and sounds really good and I will be looking forward to running it all over the place next year. I have however had it out for the MOT and it runs really well.

ENGINE
Suzuki GSXR750, billet cam – cam link with crash bungs, K&N filters, stainless steel down pipes and 2” s/steel intermediate section to inside tail seat silencer.

FRAME
Suzuki katana 1100 with modified rear section and stainless steel home made engine plates

FRONT END
Suzuki GSXR 400 USD extended forks, billet yokes, billet risers with s/steel flat drag bars with brembo master cylinders, billet cycle Speedo holder and bandit 600 front wheel and disks with brembo 4 pot callipers and s/s braided hoses

REAR END
Honda NC30 swinging arm and wheel with1200 Bandit shock,

BODYWORK
Suzuki 1100 katana tank, NC35 racing seat with polished alloy under tray, Katana fairing altered to take small lights and a cut down katana screen, GSXR 600 hugger altered to fit swing arm and a bandit front mud guard.

ELECTRICS
Suzuki GSXR 750 loom modified by owner to suit hidden car type ignition switch, small electronic rev counter mounted in fairing side panel, LED. type oil pressure, neutral and high beam lights, small chrome type switches.

PAINT
Powder coated frame, swing arm and wheels in candy red over silver, and the body work in Suzuki silver and red by owner.

POLISHING
All by owner.

ENGINEERING
Swing arm spindle and spacers by local firm, frame mods and welding by owner.

THANKS TO
Shaun at work for the s/s welding on the exhaust. Graham engineering for spindle and spacers for swing arm and 5mm alloy sheet.
Romax at Stockton for powder coating, and all the staff at J davy for there helping me find me a red to match candy red on the frame as I am colour blind.
And last of all the wife for not giving me any grief about building another bike again. Although she would not let me spray it in the bedroom this time around.

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