V8Torrent Posted October 13, 2015 Share Posted October 13, 2015 (edited) Hello everyone,I came across this webiste searching information on mods for the 1200 bandit engine.about two years ago I bought a 1992 GSXR 1100, which already had a 1200 bandit engine swapped in. The bike looked good and the engine felt good, but it was a total disaster in suspension, brakes and ride quality.I took the engine out, and disassembled the whole bike, got most of the parts powder coated in satin black and replaced all bushings, bearings and small parts I was able to locate for the bike. Also all new galfer brake and clutch lines, new rotors, pads and other minor stuff. Also the front fairing as it was a fiberglass copy and as it was too hard to find down here, repaired the lower fairings. all the plastic, fiber and paint job was done by a friend of mine.Now that the bike is closer to hit the streets I'm looking for small mods to make the engine a little more "gsxr like", I've read in this site that a common change is to use 750's cams, so any information on this type of changes is welcome. The idea is not to build a monster engine, not even taking it apart, but change minor stuff to make it "happier".Some pics, the fairings are not yet mounted, just sitted on top to check for parts to bolt them. This is when I bought it.. looked "good" but terrible to ride.Off to powder coating.During assembly. This is current looks, still need to fix forks so haven't ride it yet. the scratches are too deep so decided not to install new seals until I get forks. Just bought a used set from a 91 750, I think I can make a decent set for the 1100 out of both of them. Edited October 13, 2015 by V8Torrent 1 Quote Link to comment
Captain Chaos Posted October 13, 2015 Share Posted October 13, 2015 Hi and welcome. You're our first member from South America if I'm not mistaken.I'm not sure but I don't think 750 and 1100 forks are compatible. Quote Link to comment
Oilyspanner Posted October 13, 2015 Share Posted October 13, 2015 Hi V8T - project's looking good !The standard Slingshot 1100s didn't handle brilliantly when new, years on with saggy old suspension will make things worse. But it's easy enough to make them handle much better with better suspension parts, I fitted a Nitron shock in the rear and resprung and refurbished the forks - with set-up the suspension is very decent now.If you fit 750 forks (showa) they are 35mm shorter than the standard 1100 forks (kayaba), I'm not sure if you can mixt he internals. If you fit 750 forks (or pretty much any others) you can't mount the handlebars above the top yoke, you would also need to fit a 750 fairing and bracket, so the new bars don't foul the fairing.The Bandit as you know, has soft cams, you can fit 1986 - 90 GSXR1100 cams or the 1988/89 750 cams - they both seem to have the same duration and lift - these will let the motor fly from mid range upward. The Bandit motor has lower compression than the R too, you could mill the head to lift the compression, which will help performance everywhere.Some people like to just add the GSXR inlet cam, which adds a lot pretty much everywhere, but the motor won't rev out and it'll peak lower than both R cams.Hope that makes sense, I'm in a rush ! 2 Quote Link to comment
SFC Posted October 13, 2015 Share Posted October 13, 2015 as above plus you also need the cam sprockets off the bandit to fit onto gsxr cams Quote Link to comment
V8Torrent Posted October 13, 2015 Author Share Posted October 13, 2015 Thanks everyone,Sad to know the forks are no good for the bike... I will have a set of 750 forks lying around for a while I guess.Will keep reading on the cams swap. Quote Link to comment
fatblokeonbandit Posted October 13, 2015 Share Posted October 13, 2015 Best bang for your buck on a b12 engine is to stick the head and cams from a gsxr750 J/K as this bolts straight on and ups comp ratio and has better cams, Ive done it twice to 1200 engines and had over 130 rwhp both times, and the things rev much better, you do lose mid range though..... or just the cams should see you over 120 rwhp.. Quote Link to comment
V8Torrent Posted October 13, 2015 Author Share Posted October 13, 2015 Ok, so head on to look for GSXR750 J/K cams... Do I need to get any other parts from that bike?as SFC said, will my current cam sprockets be good to use with the 750 cams?any other thing I should notice? Quote Link to comment
fatblokeonbandit Posted October 13, 2015 Share Posted October 13, 2015 Ok, so head on to look for GSXR750 J/K cams... Do I need to get any other parts from that bike?as SFC said, will my current cam sprockets be good to use with the 750 cams?any other thing I should notice? you have to use the bandit cqm wheels as the cam chains are of a differant type, and some people recomend slotting the sprockets and dialing them in, if you have the expertise and equipment then it is probably best, but i didnt know any better when i did it the first time 10 years ago, so i slapped them in and fired it up and it went like a rocket Quote Link to comment
V8Torrent Posted October 14, 2015 Author Share Posted October 14, 2015 you have to use the bandit cqm wheels as the cam chains are of a differant type, and some people recomend slotting the sprockets and dialing them in, if you have the expertise and equipment then it is probably best, but i didnt know any better when i did it the first time 10 years ago, so i slapped them in and fired it up and it went like a rocket A guy from a facebook group also tells me that I could use the complete head from the J-K 750. ¿is this correct? (I asume I still need to change the cqm wheels from the bandit engine)... is the 750 head chamber smaller? that would help increase compression. Quote Link to comment
fatblokeonbandit Posted October 14, 2015 Share Posted October 14, 2015 Best bang for your buck on a b12 engine is to stick the head and cams from a gsxr750 J/K as this bolts straight on and ups comp ratio and has better cams, Ive done it twice to 1200 engines and had over 130 rwhp both times, and the things rev much better, you do lose mid range though..... or just the cams should see you over 120 rwhp..Yup.... 1 Quote Link to comment
V8Torrent Posted October 14, 2015 Author Share Posted October 14, 2015 Yup....ups! you said it too!! I've seen a set on Eblag ... mmh. 1 Quote Link to comment
Darryl Posted June 28, 2021 Share Posted June 28, 2021 Can I use Bandit 1200 cams on my 92 1100 say what now!? ? Quote Link to comment
Gixer1460 Posted June 29, 2021 Share Posted June 29, 2021 10 hours ago, Darryl said: Can I use Bandit 1200 cams on my 92 1100 say what now!? ? No ! Head design is completely different - Blandit has screw adjusted valves, 92 GSXR has shims. Quote Link to comment
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