duncan Posted October 8, 2017 Share Posted October 8, 2017 (edited) Hello all! Good to see this forum is still (again) alive, I've got good memories of the old dinosaur board. Crazy amounts of say what now!? knowledge! Bit of history, I've bought and ridden an '85 slab the last 10 years, love it to bits. Rebuild the engine at 80k, she is well over 100k now. Finally managed to get a complete set of not too damaged bodywork last year. Send it off to the painters because she deserved a proper new jacket to go with the near new engine, it was the last step to making it showroom state. Then the shed burned down while I was away everything gone. Attached a photo of her 100k birthday. But yeah, I have a 100% perfect blue/white slab bodywork and tank, it survived since it was still at the painters. No time to look back too long, dug out a reasonably unmolested slabside to rebuild last week. It's got me a bit confused though, I'm not sure if it's really an 85 model. The frame number is GR75AD105xxx, engine R705-108xxx. As far as I know "GR75AD" is '86 G model, but 105xxx range should still be a '85 F model. Can't tell anything based on the bike itself because other tell-tale signs are removed: Obviously no bodywork, but also no seat, front cowl bracket, switchgear, footpegs or exhaust. Any help would be appreciated. Regards, duncan PS. Is the good old marketplace still hidden somewhere? I'll be needing plenty of parts coming months. PPS. Just to make it overly obvious, the photo below is my old slab, not the new one. Edited October 8, 2017 by duncan 1 Quote Link to comment
Captain Chaos Posted October 8, 2017 Share Posted October 8, 2017 Hi and welcome back. Marketplace will be accessible to you after you make 50 posts. About the 85/86 question... isn't the front wheel spindle or something like that a larger diameter on later bikes? An expert will be along soon. Quote Link to comment
Fazz711 Posted October 8, 2017 Share Posted October 8, 2017 Hi bud. Welcome back to OSS Quote Link to comment
banoffee Posted October 8, 2017 Share Posted October 8, 2017 Welcome. Basic info on FGH differences are on here: http://www.suzukicycles.org/GSX-R-series/GSX-R750_a.shtml Quote Link to comment
duncan Posted October 9, 2017 Author Share Posted October 9, 2017 12 hours ago, Captain Chaos said: isn't the front wheel spindle or something like that a larger diameter on later bikes? An expert will be along soon. Excellent idea, will check on that. I also know the swingarm on the '85 is supposed to be shorter than the later models, but without any reference it's hard to check. And it's easily swapped, so not a definite sign of age. Good to be back! Quote Link to comment
Swiss Toni Posted October 9, 2017 Share Posted October 9, 2017 Welcome! Bad news about the fire, but you've obviously said 'Fuck it' and got on with life. '85 had fibreglass lower fairing (belly pan) as std, twin seats, 3 bolt top/mid fairing panels, front mudguard (I think) is also different. Quote Link to comment
duncan Posted October 9, 2017 Author Share Posted October 9, 2017 (edited) It's the only way really, isn't it Twin seats, 3-bolt top fairing (and also only a single bolt below the headlights), exhaust shield with round perforations I have. But all these can be swapped between bikes easily. I'm really looking for the frame number to give me a surefire way to date it, but I cannot make sense of it because of the "GR75AD" instead of the common "GR75A-". Suzuki cycles states it should be the "Check digit: Allows the manufacturer or authorities to see if the VIN is genuine or not, 0-9 or X". But then a "D" does not fit... Edited October 9, 2017 by duncan Quote Link to comment
Swiss Toni Posted October 9, 2017 Share Posted October 9, 2017 I may be able to date the frame later on for you. If anyone else has the info to hand...feel free. Quote Link to comment
Gammaboy Posted October 9, 2017 Share Posted October 9, 2017 5 hours ago, Swiss Toni said: I may be able to date the frame later on for you. Taking it out for a nice dinner and a movie? Quote Link to comment
Swiss Toni Posted October 9, 2017 Share Posted October 9, 2017 No way! I like cheap dates! Quote Link to comment
duncan Posted October 10, 2017 Author Share Posted October 10, 2017 (edited) Take-away curry and a pirated movie then The bike passed through Germany somewhere during it's life, and has a German ID plate on the head stock. Matches the frame number, of course, and looks official. Edited October 10, 2017 by duncan Quote Link to comment
Swiss Toni Posted October 10, 2017 Share Posted October 10, 2017 I'll try to get some info this morning for you, Duncan. Quote Link to comment
Swiss Toni Posted October 10, 2017 Share Posted October 10, 2017 Not a lot of help but I'll keep looking.'85-'86 front axle was 15mm 300mm disc, '87 went to 17mm, same size disc. Found these, so I'll post: 1 Quote Link to comment
duncan Posted October 12, 2017 Author Share Posted October 12, 2017 Thanks! That second list, has the "D" suffix optional for all Slab models, and some others as well. I'm slowly getting more confident it might really be an '85. Need to find what that "D" means, then. Quote Link to comment
Swiss Toni Posted October 12, 2017 Share Posted October 12, 2017 Duncan, the only relevance I can attach to the 'D' suffix, is that in later Slingshot models, it denoted 'Swiss Domestic Market'. Quote Link to comment
KATANAMANGLER Posted October 12, 2017 Share Posted October 12, 2017 Welcome back. Quote Link to comment
duncan Posted October 15, 2017 Author Share Posted October 15, 2017 On 10/12/2017 at 11:46 AM, Swiss Toni said: Duncan, the only relevance I can attach to the 'D' suffix, is that in later Slingshot models, it denoted 'Swiss Domestic Market'. Thanks, that's helpful. It would make sense, as far as I can trace this bike spent a lot of it's life in (deep) south Germany. Not unthinkable it got there from Switzerland, it's practically around the corner. Quote Link to comment
E T Posted October 18, 2017 Share Posted October 18, 2017 I have a standard F & aG that's been messeed with, as well as usual give aways I've seen a few other differences, bar end weights are longer on f but that might just be jap model difference. My g has rubbers on rear pegs & hooks on under sides Quote Link to comment
duncan Posted October 19, 2017 Author Share Posted October 19, 2017 It's what makes it so difficult in my case: The bike is practically in bits from the breakers. I have a set of steps with and one without rubber on the pegs. No clip-ons because an aftermarket superbike handlebar was fitted, but a spare set of clipons (without the weights) came with it. Quote Link to comment
Del Posted October 22, 2017 Share Posted October 22, 2017 On 08/10/2017 at 7:38 PM, Captain Chaos said: Hi and welcome back. Marketplace will be accessible to you after you make 50 posts. About the 85/86 question... isn't the front wheel spindle or something like that a larger diameter on later bikes? An expert will be along soon. Both are 15mm,along with the 1100g ☺️ Quote Link to comment
duncan Posted November 5, 2017 Author Share Posted November 5, 2017 (edited) Dug out another clue: The bracket holding the horn, fixed by the lower two bolts of the coils, seems to be different between 85 and 86, and I have the 85 one stuck in place with some very original looking (read: very stuck) bolts. 27: 38500-27A02 Horn Assembly Model F 28: 38500-06B01 Horn Assembly Model G/H Edited November 5, 2017 by duncan Quote Link to comment
duncan Posted November 5, 2017 Author Share Posted November 5, 2017 And as a general project update: hotwired a battery, flushed the carbs until clean fuel came out of the drains, and she fired right up. Left a nice patch of rust and oil on the wall directly behind the zorst but a few minutes later she idles nice, decent throttle response and no more smoke. 3 Quote Link to comment
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