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Hey there, I have a 1978 CB750k. I had the stock exhaust on mine but had a rust hole in it, so I chopped it right below the foot peg…. Bad idea and wish I never had. Haven’t ridden it much at all, barely had any torque after that, now the bike will barely pull its own weight. Thinking I burnt...

After taking my 1978 cb750k carbs apart for a rebuild, taking plenty of pictures and videos, I put it all back together and now my choke is not engaging to close the butterfly valves. I did it just as I took videos of, so I know the springs are in the right position. The cable is moving and...

Alright guys, I’m totally new to the carbs on these. I have just left them stock for as long as I have had the bike, just did a deep cleaning and new gaskets. I have done a ton of reading, however I have not found much on the screw with a question mark. Pretty sure the a/f mixture screw is on...

Hey guys, this is a 1978 cb750k. I am getting spark on 1 and 4, but not 2 and 3. I am getting power in the yellow wire all the way up to the connection to the coil. The multimeter reads that it is getting power, then as soon as I plug it up to the wire that connects the coil it drops off. It has...

Hey guys, I have a 78 cb750k. I have done a lot of work on the bike, starting with unseizing the engine, new pistons rings, new valves, valve adjustment, coil packs, spark plugs, carb rebuild, pods and chopping the exhaust just behind where your foot sits to ride. The bike will start, and I have...

I am going to go in depth to give as much info as possibly to help diagnose because I am totally stumped. Problem :Engine will turn all the way with screwdriver and about 50 lbs of force on the crank, but kickstart will not turn the engine over. Back story: This is a 1978 cb750 that was sitting...

I am going to go in depth to give as much info as possibly to help diagnose because I am totally stumped. Problem: Engine will turn all the way with screwdriver and about 50 lbs of force on the crank, but kickstart will not turn the engine over. Back story: This is a 1978 cb750 that was sitting...

I just completed my first rebuild, putting the engine all back together. I have installed the camshaft at top dead center on cyl 1, and to my understanding is also top dead center for cyl 4 (please correct me if I'm wrong because it makes sense in my head but I'm not 100%), now I am getting...

I have a 1978 cb750k. I took the air box off when I first bought the bike, and it ran without it. Not great, but it would run and I could drive it around. Now, I just chopped the muffler off of the exhaust and it will run for about 3-5 seconds then cuts off. When I give it any gas, it...

Hey there, I have a 78 cb750f. It has been sitting in a barn about 10-15 years. After un-seizing the engine, a bit of electrical work, cleaning the carb 3 times, and a battery, got it fired up and driving again! I have driven it around my apartment complex for about 20 minutes, didn’t run great...

I have a 78 cb750f that sat in a barn for about 10-15 years. I totally rebuilt the carbs, making sure to spray every hole with carb cleaner and watched for it to come out a different hole, made sure the lines were clear and replaced lines that were in bad shape, then put it all back together. It...