Gsx1100er Posted May 5, 2019 Posted May 5, 2019 (edited) I'm told that physically this is a straight bolt in job. What bits of the 750 are compatible with this motor ? Exhaust system ? CDI unit and coils ? Oil cooler ? Chain and sprockets ? Anyone wanting to part with a good , complete B12 motor ? Cheers Gaz Carbs ? Edited May 5, 2019 by Gsx1100er Quote
wraith Posted May 5, 2019 Posted May 5, 2019 Carbs. yes but will need tuning. Zorst. change sumps etc around, yes but just. Chain/sprockets. yes but you may as well out new on. Oil cooler. May need to change lines but yes.I CDI. don't know. Spare b12 motor. NO Quote
caferacerdan Posted May 6, 2019 Posted May 6, 2019 CDI no! The 750 CDI rev limit is too high for the b12 motor so you will want a 12 cdi I'd say best option is buy a full bandit 12 swap motor wiring across etc and flog the rest Quote
wraith Posted May 6, 2019 Posted May 6, 2019 Don't think a b12 cdi box will fit the slingshot harness, as they have different wiring blocks, you could look out for a gsx1100f power screen cdi, same revs as a b12 and same block as the slingshot. Quote
dupersunc Posted May 6, 2019 Posted May 6, 2019 Not sure the B12 is much of an up grade. But to answer your questions. Lower rear engine mount is a different size. drill frame to suit, or sleeve engine. Fit 750 sump and pick up to 1200 engine the cooler will fit and so should the exhaust. 750 coils are fine. Cdi, I've always run the 750 cdi on 1100 motors no problem rev limit is higher but the 1200 motor struggles to rev that high anyway. fit the 750 igntion pick up to the 1200 lump. Carbs, yes with the correct inlet rubbers, but will need jetting to suit. Chain and sprockets fit, but the 750 sizes will leave it geared for 185mph and it will feel flat as a fart. 1 Quote
canamant Posted May 11, 2019 Posted May 11, 2019 Even if the B12 didn't get asthmatic (or if you give it a shot of Ventolin !) the 750 CDI will be OK. That is what revcounters are for ! Quote
Gsx1100er Posted May 11, 2019 Author Posted May 11, 2019 Cheers guys . The reason i asked is that my project ( suzi 2 ) was supposed to be finished last weekend. Bike started up and was smokey for a couple of minutes ( which i thought was ok as it had been standing for a while ). Smoke got worse to the point of oil running down the exhaust pipes !! I took a chance on the motor and always planned to put a B12 in if it wasn't right , hence my questions. I decided to strip the head and barrels off the 750 and surprise , surprise !! Its got a virtually new Wiseco 771 big bore kit fitted. the bores are perfect but it appears whoever built it put the standard rings back in. you can hold a dance in the ring gaps !!! Valve guides are all good. Hopefully a set of correct rings and valve stem oil seals will cure the problem. No B12 now required. Gaz Quote
Dezza Posted May 11, 2019 Posted May 11, 2019 If set up correctly it probably won't feel that flat; a nice 7/12 will be at least several tons lighter than a blandit 1200 and just by binning the stock pipe it will gain a few hp. Quote
Jaydee Posted May 12, 2019 Posted May 12, 2019 4 hours ago, Dezza said: If set up correctly it probably won't feel that flat; a nice 7/12 will be at least several tons lighter than a blandit 1200 and just by binning the stock pipe it will gain a few hp. I know what you mean about how heavy bandit systems are but swapping the bandit frame for a slingshot one is probaly where the biggest weight saver will be. Quote
Gsx1100er Posted September 6, 2019 Author Posted September 6, 2019 Right Guys , things not gone to plan with 750 Wisco771 motor. It turns out the the original overbored block was inaccurate on 1 and 4 cylinders and took an age to find this out. Going to rebuild it with standard block and pistons for the time being. The 771 piston kit ( virtually new ) will be sold. Have decided to go with a 1200 bandit swap over the winter and just need a couple of extra bits of info from the collective: Going to use the 38 Mikunis off the 750 motor. Will the 750 carb rubbers be suitable on the Bandit head ? Gearing : Superdunc advised the 750 gearing will leave it feeling "flat " Std Bandit gearing is 15 /45 : 750 gearing is 15/43. Im not after great top speed , just good hard acceleration. would going 14/43 be suitable ? Whats anyone else running ? Cheers guys Gaz Quote
dupersunc Posted September 6, 2019 Posted September 6, 2019 15/47 or 48 works really well. Carb rubbers should work fine. I'd bung the 750 cams in the 1200 lump. 1 Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.