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Hello everyone!I am currently looking into purchased a 1978 CB 750. Does anyone know if the frame is any different (bigger...etc) then lets say a 1969-1974 frame? I know the noticeable differences like the tank and the seat/tail...and small engine differences? But, is there more? I want to buy a cb 750 and transform it into a cafe racer and want to know that I have the right foundation to start with. I see alot of cafes and all seem to be 1969-1974 years.....why?Thanks in advance!Jakub
so is there a website for specific details on changes for these years? I just want to be 100% sure!
Quote from: greenjeans on February 23, 2010, 01:39:36 PMWhat are glaring differences between the 77's & 78's vs the older ones that I'm more familiar with ?The 77/78's have a 17" rear wheel vs. 18".77/78 has a 76F motor - higher compression than 76K77/78 has caps instead of gators on the shocks77/78 has a longer grab bar77/78 has a hidden fuel cap with door - tank is bigger/wider77/78 has a saddle with hinge (and latch) on the wrong side?! 78 saddle is "stepped"77/78 has HM401s instead of HM340s or HM300s77/78 has a slightly longer swing arm (I think) - overall wheelbase is longer77/78 has a 630 chain as opposed to 53077/78 has a new style side cover77/78 has blue background gauges77/78 has ignition key in the console (diff console as well) that locks the fork77/78 has accelerator pumps and shorter manifolds (rubber connectors to head)77/78 has a different airbox with larger openings for the carb/airbox connector77/78 fender is shorter at the top with no stays on top sideThe look of a 77/78 is decidedly more modern. I have a 74, 76, 77, 78 and I like the K0 look best ?!I'm sure there's more
What are glaring differences between the 77's & 78's vs the older ones that I'm more familiar with ?
... except I like the big-ass K7, K8 tanks
Some reasons why I would recommend a 77-78 to modify (please note the lack of the "C" word):>less desireable and therefore cheaper (usually)>wires from the switches on the bars (horn, start, turn, kill) run outside - easy to change bars>brake light switch is in the lever/MC *(on a '78) - one piece brake line>big ass 630 chain looks bad ass >longer bike handles better at ton-speed in straight lines on the highway (where do you run flat out?)>longer fork sliders mean that a fork stabilizer is available from tarozzi>prefer the accelerator pump carbs IMHO >choke is cable opp erated and the fuel valve is on the left - nice to be able to move those without standing on your head >ignition switch up on the bars and it also locks the bars - older CBs have a separate lock for the bars(again standing on your head) and the ignition switch is down under as well>the tank is ugly as homemade sin, but older cb tanks fit and if you are changing the seat anyways this is an easy swap*Just trying to keep cooking daddy happy
One big difference is the oil tank. You will not be able to switch them. Also you will not be able to run clubman bars on the 77-78. The tank is too wide.
Swing arm is 10mm wider as is the upper shock mounting bolt and sprocket carrier on the left side of the 77-78 750's, the rear wheel is the same but the axle spacers are different on the 77-78 years to account for the difference in width.
Correct me if I'm wrong Retro, but didn't the rake and trail increase a bit as well with the 77-78 750's also?
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