Hello, if anyone could give me some possible insight to what’s going on with my bike that would be much appreciated.
My 1980 CB 750 has been running terribly, I’m able to get it to start but has a very very weak idle even with the choke all the way on. In addition to this, it gets rev locked around 3-4k rpm and is shooting a ton of black smoke out the back. I just changed the spark plugs, had the valve springs adjusted, and I know it has fresh 92 in it. The carburetors are brand new and only have about 300 miles on them, they are Keihin racing carbs. I did not install them I had a shop do it but who knows they could have done a bad job and left something loose or whatnot. Also, there is already a bunch of carbon buildup on my spark plugs that literally have less than 100 miles on them.
I am just getting into bikes, so while I do have a solid amount of basic knowledge about them, I am still a novice. Any help would be greatly appreciated.
My 1980 CB 750 has been running terribly, I’m able to get it to start but has a very very weak idle even with the choke all the way on. In addition to this, it gets rev locked around 3-4k rpm and is shooting a ton of black smoke out the back. I just changed the spark plugs, had the valve springs adjusted, and I know it has fresh 92 in it. The carburetors are brand new and only have about 300 miles on them, they are Keihin racing carbs. I did not install them I had a shop do it but who knows they could have done a bad job and left something loose or whatnot. Also, there is already a bunch of carbon buildup on my spark plugs that literally have less than 100 miles on them.
I am just getting into bikes, so while I do have a solid amount of basic knowledge about them, I am still a novice. Any help would be greatly appreciated.