macepatrick
CB750 New member
Hello!
New to the forum and to these bikes in general. I recently "inherited" my stepfathers project 81 cb750f super sport that he never managed to get back together. From what I understand, he had bought one no title, then found a titled frame in the junkyard and was in the process of switching everything over. As far as I can tell from shopping parts (and the print on the side covers), this year and model is accurate.
I have some experience with wrenching on motorcycles as I had a 80 Yamaha GT80 when I was a little kid, and then a 80 Yamaha 850xs when I was a younger man, some 25+ years ago. But its been a long time and I have no experience with this bike. Also, it came in pieces. I didnt take it apart, so I dont have a great reference for what Im dealing with. My uncle, who ended up storing the project for the last 3 years since my stepdad passed, had just loosely bolted the engine in the frame, hand tightened the frame together, and tossed some wheels on it to just be able to move it around and throw it in the truck to bring to me. So, this is where Im at.
I have a Clymers manual for i think 75-79 cb750s and found a site with exploded drawings with part numbers, but some of them arent very clear and Im not getting that 100% fuzzy confidence with what nuts and bolts go where.
Im not going to strip this down , re-paint, and make this all super showroom. My intention is to just basically finish my stepdads final project. Get it back together and running enough to take it for a safe ride. I was told he drove the bike around before everything was disassembled for the frame swap, so the engine did run.
I think my process from here will be to A) Button the frame down and make sure the motor is securely mounted. B) Get the carbs, exhaust, coils, and start button/ key wired back in and make sure its going to start/ run again. C) After she idles and revs, focus on shocks, brakes, and tires. D) accessory wiring and lighting and cosmetics.
My current questions are, if anyone would like to help:
1) Does this seem like a good order of operations, is there anything I need to pay special attention to in the order?
2) Are there any specific bushings or washers I should be looking for to button down the frame/ mounted motor assembly? I dont see any in the parts drawings, but im noticing some decent gaps how its currently put together. Again, nothing is torqued or tightened to finish spec, so maybe thats just how it looks loose?
3) Do you have any other recommended go-to references that you would encourage me to find?
4) Should I put some Marvel Mystery oil in the intake and exhaust ports and just let it sit for now while I get everything else ready to go, then crank it by hand and make sure everything is lubed and free before I hit it with the starter?
I appreciate any and all well intentioned advice! Thanks for reading and participating in the journey!
-Shaun
New to the forum and to these bikes in general. I recently "inherited" my stepfathers project 81 cb750f super sport that he never managed to get back together. From what I understand, he had bought one no title, then found a titled frame in the junkyard and was in the process of switching everything over. As far as I can tell from shopping parts (and the print on the side covers), this year and model is accurate.
I have some experience with wrenching on motorcycles as I had a 80 Yamaha GT80 when I was a little kid, and then a 80 Yamaha 850xs when I was a younger man, some 25+ years ago. But its been a long time and I have no experience with this bike. Also, it came in pieces. I didnt take it apart, so I dont have a great reference for what Im dealing with. My uncle, who ended up storing the project for the last 3 years since my stepdad passed, had just loosely bolted the engine in the frame, hand tightened the frame together, and tossed some wheels on it to just be able to move it around and throw it in the truck to bring to me. So, this is where Im at.
I have a Clymers manual for i think 75-79 cb750s and found a site with exploded drawings with part numbers, but some of them arent very clear and Im not getting that 100% fuzzy confidence with what nuts and bolts go where.
Im not going to strip this down , re-paint, and make this all super showroom. My intention is to just basically finish my stepdads final project. Get it back together and running enough to take it for a safe ride. I was told he drove the bike around before everything was disassembled for the frame swap, so the engine did run.
I think my process from here will be to A) Button the frame down and make sure the motor is securely mounted. B) Get the carbs, exhaust, coils, and start button/ key wired back in and make sure its going to start/ run again. C) After she idles and revs, focus on shocks, brakes, and tires. D) accessory wiring and lighting and cosmetics.
My current questions are, if anyone would like to help:
1) Does this seem like a good order of operations, is there anything I need to pay special attention to in the order?
2) Are there any specific bushings or washers I should be looking for to button down the frame/ mounted motor assembly? I dont see any in the parts drawings, but im noticing some decent gaps how its currently put together. Again, nothing is torqued or tightened to finish spec, so maybe thats just how it looks loose?
3) Do you have any other recommended go-to references that you would encourage me to find?
4) Should I put some Marvel Mystery oil in the intake and exhaust ports and just let it sit for now while I get everything else ready to go, then crank it by hand and make sure everything is lubed and free before I hit it with the starter?
I appreciate any and all well intentioned advice! Thanks for reading and participating in the journey!
-Shaun
