Hey guys just scored a bobber basket case with a Honda cb 750 engine, looks 70s as far as I can tell but I've never done a basket case before? Any recommendations on places to start looking for assembly or just general Honda engine maintenance tips?
-
Enter the April CB750 Supply gift certificate giveaway! It's easy... Click here, post something, and you're entered into the drawing!
First basket case
- Thread starter somekid
- Start date
Definitely a SOHC. Other members will more experience will be able to discern 60s from 70s.
Maintenance tips can be found in this forum via searches and YouTube channels dedicated to these bikes. Probably not the answer you're looking for but that question is so broad the best responses to your question are ones targeted at specifics.
Maintenance tips can be found in this forum via searches and YouTube channels dedicated to these bikes. Probably not the answer you're looking for but that question is so broad the best responses to your question are ones targeted at specifics.
Qaxe
CB750 Addict
Edit:
It's no NEWER than 1978 for certain (I typed "no older" when I was tired).
Engine number is just below the starter motor, inside the long rectangle. CB750E something.
Here's the engine number list: http://www.hondachopper.com/engine/engine_timeline/timeline.html
It's facing the wrong way for me to see the front sprocket... but if it's 77 or 78 K model, the front sprocket will be attached with a single bolt in the center... Meh. Engine number is your bet.
It's no NEWER than 1978 for certain (I typed "no older" when I was tired).
Engine number is just below the starter motor, inside the long rectangle. CB750E something.
Here's the engine number list: http://www.hondachopper.com/engine/engine_timeline/timeline.html
It's facing the wrong way for me to see the front sprocket... but if it's 77 or 78 K model, the front sprocket will be attached with a single bolt in the center... Meh. Engine number is your bet.
Last edited:
It is a sohc for sure. The engine vin is stamped between the starter and the sprocket on the top of the case in that rectangular pad. The frame with have the vin stamped on the steering neck.
Thank you for the help guys, the code i found was cb750e-220284. I found a gasket rebuild kit that's coming in the mail and I will be starting the complete teardown and rebuild in a day or so.
The frame must be a custom stretch job because there is no frame number and it does not look like the frame for the '73.
The frame must be a custom stretch job because there is no frame number and it does not look like the frame for the '73.
Qaxe
CB750 Addict
No frame number? It must have, because that's where the VIN is. The frame "is" the bike. Your engine number probably isn't even written on the title.
This will help you find the Vehicle ID #.
Location #1: There's a VIN plate riveted onto your frame on the right side of the neck of the frame. It shows the VIN and the year it was made. In order to remove it, someone would have had to drill out the rivets, and that would be a problem. Based on your photo, I can't tell if there are just holes where the plate used to be, or if those are rivets and the plate has been painted over. If it's the latter, then I would get some paint remover and gently clean off the plate.
Location #2, the VIN is stamped into the metal on the left side of the neck. The only way to remove that would be with a grinder. That would be really bad. Hopefully it's there.
If you have no VIN, then you can't prove that the bike is yours, even with a title. If the Law pulled you over for anything at all... ouch.
FYI, CB750 engines from 69 to 78 will all fit in any frame from those years.
Based on your photo, your frame is 69 to 76. In 1977, there were removable plates on both sides so that we could remove/install the engine from either side. Your frame could be a 73'. But check your VIN plate, the year is written in big letters.
This will help you find the Vehicle ID #.
Location #1: There's a VIN plate riveted onto your frame on the right side of the neck of the frame. It shows the VIN and the year it was made. In order to remove it, someone would have had to drill out the rivets, and that would be a problem. Based on your photo, I can't tell if there are just holes where the plate used to be, or if those are rivets and the plate has been painted over. If it's the latter, then I would get some paint remover and gently clean off the plate.
Location #2, the VIN is stamped into the metal on the left side of the neck. The only way to remove that would be with a grinder. That would be really bad. Hopefully it's there.
If you have no VIN, then you can't prove that the bike is yours, even with a title. If the Law pulled you over for anything at all... ouch.
FYI, CB750 engines from 69 to 78 will all fit in any frame from those years.
Based on your photo, your frame is 69 to 76. In 1977, there were removable plates on both sides so that we could remove/install the engine from either side. Your frame could be a 73'. But check your VIN plate, the year is written in big letters.
Last edited:
Yea bro you were right. I went at it with turpentime and a brillow pad and I almost destroyed the number. So I went with a few shop towels and brake cleaner to get started at least cleaning up the valve cover. Tomorrow or the next day I'll take the cam and rocker arms off and lightly clean those. I'm debating if I should spend the money and get the top end (once disassembled) sent out for vaporblasting.
Attachments
Your engine is a very early 73 K3, the frame also looks like a 73 K3. Ask any questions you have about the engine and Ill get to you as soon as I can. Keep the rockers in the correct spots as they are worn to that specific cam lobe.
Thank you for the knowledge. This is my first "big" job on a bike, I only am taking it on because its my dream bike and I'm mechanically inclined, but I come from a hot rodder family. I only sort of know what I'm doing and I can't fuck it up or I'll lose a nut lmao.
