Eben Posted January 27, 2016 Share Posted January 27, 2016 Howzit All! Recently a very special Katana came my way when my old friend passed away from cancer. It is a genuine E27spec Katana GSX1100SXZ. Even more special with all the Yoshi goodies! This specific bike has a Yoshi big bore piston kit, gas flowed head, Dyna coils, 33mm Smoothbores, period Yoshi pipe, V&H filters, superhub clutch, and might have wilder cams. The rear wire rim was widened to 4 inches and a 150/18 tyre fitted, looks soooo right! Fork brace and Marzochis on the rear round this very capable Kat off. Getting to my question. He told me it is a 1142cc Yoshi big bore kit. This however looks unlikely considering the standard 66mm stroke. I would think 1135cc as on the later EF Suzukis? I surfed the Net and could not get an answer up to now. Does anybody on this Forum know what sizes the Yoshimura big bore kits for the GSX 1100 motor came in? Cheers Eben 3 Quote Link to comment
kiwi Posted January 27, 2016 Share Posted January 27, 2016 IIRC it would be a 1134cc piston kit Quote Link to comment
Nigkat Posted January 27, 2016 Share Posted January 27, 2016 Lovely looking Kat. I see it has a round section swinging arm to. not seen one of those before, is it original Suzuki? Quote Link to comment
Eben Posted January 28, 2016 Author Share Posted January 28, 2016 Yes, only the 1100SXZ had the tube chromemolly swingarm. Standard 1100SZ and 1000SZ had the box aluminium swingarm. Although mine has the 33mm smoothbore carbs, they came out with the same 32mm oval bore carbs as on the 1000SZ, except for larger main jets. I may be mistaken, but I was told by my old friend that the 750SZ also had a tube swingarm, don't know, 750's actually very scarce in power mad SA! Quote Link to comment
Eben Posted January 28, 2016 Author Share Posted January 28, 2016 I'm just guessing and asking now, is it possible that the 1135cc EF was developed from the Yoshimura 1135? kit earlier? Quote Link to comment
Eben Posted January 28, 2016 Author Share Posted January 28, 2016 If so, will the std rings for the 1135 EF fit the Yoshi pistons then? Just thinking if one day I need to replace rings! Quote Link to comment
Markz9 Posted January 28, 2016 Share Posted January 28, 2016 Might be worth doing a compression leak down test if proper race yoshi Pistons the tended to only have two rings not three but they changed Pistons every race so not worried about wear two ring Pistons suffer from piston slap not really suitable for road bike Quote Link to comment
nilowizz Posted January 28, 2016 Share Posted January 28, 2016 My Yoshi kit is 1140cc says so on the receipt, with high lift cams with POPs engraved on the cam ends. Nice.. Nilowizz Quote Link to comment
Eben Posted January 28, 2016 Author Share Posted January 28, 2016 Then I suppose mine has to be 1140cc. I did read on the Net somewhere also mention of 1140cc Yoshi kit. I remember Dawid (my old friend) saying Yoshi kit smaller than the 1168 Wiseco kit. He also mentioned high lift degreed cams, which I suppose makes sense when gas flow head, 33mm smoothbores, Yoshi race pipe, superhub clutch etc? She certainly has a hefty kick around 6500rpm right up to and probably beyond the 9000rpm redline. The bike is geared for 256km/h, which I believe achievable, 220 coming up in a flash. Bike is surprisingly ride-able in town, although she obviously prefers the open road. The smootbores obviously not too happy being wacked open at low revs in a high gear. Idles reasonably OK too after I got those slides to open at exactly the same time. Is these Yoshi pistons only 2 rings per piston? Hope not! Quote Link to comment
Markz9 Posted January 28, 2016 Share Posted January 28, 2016 funny enough I have a set of the original oval carbs from this bike Quote Link to comment
sparki Posted January 28, 2016 Share Posted January 28, 2016 gorgeous example you have there... would love to see a few more if you have them Quote Link to comment
johnr Posted January 28, 2016 Share Posted January 28, 2016 swingarm looks like a gs1000 arm. Quote Link to comment
IanC Posted January 28, 2016 Share Posted January 28, 2016 Stunning Kat. Sorry to hear about your friend but it sounds like the bike is in good hands. Quote Link to comment
Eben Posted January 29, 2016 Author Share Posted January 29, 2016 8 hours ago, johnr said: swingarm looks like a gs1000 arm. No, chromemolly, and only on the South African spec SXZ Quote Link to comment
Chesney Posted December 17, 2019 Share Posted December 17, 2019 Hi all a beautiful bike, I'm building one and need a few things would like to get a set of those spoke rims etc. Quote Link to comment
Chesney Posted December 17, 2019 Share Posted December 17, 2019 My name is Chesney I'm from Cape Town and have all the bits and pieces to build a Katana. I have a good 1000sz frame and a 1100 motor that needs TLC. Will post some pics soon. Quote Link to comment
johnr Posted January 6, 2020 Share Posted January 6, 2020 (edited) On 12/17/2019 at 12:32 AM, Chesney said: Hi all a beautiful bike, I'm building one and need a few things would like to get a set of those spoke rims etc. theyre early gs1000 wheels, only the gs1000 and a very few gt750's had the spoked rear wheel with a disk brake, plenty of other suzukis from the gs range and gt range of the time had the spoked disk brake fronts, but that rear hub is what youre paying for when you buy a set of these wheels, 90% of the value is in that hub. Edited January 6, 2020 by johnr Quote Link to comment
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