I’m new to forums and to motorcycles. I’ve always loved café racers and old CB450’s, so I’m making one.
I got it on EBay last month for $1475
Since then I’ve:
-Cleaned it up
-Rebuilt the carburetors
-Replaced the points
-Rebuilt the advance mechanism
-Adjusted the valves
-Adjusted the timing
-Installed new tires
-Installed a stainless steel bolt kit
-Rebuilt the brakes
-Replaced front brake cable
-Replaced all of the light bulbs
-Repaired tachometer and speedometer
This is what it looks like now
I'm still trying to decide what to do for air cleaners.
My goal right now is to get the bike running. I plan on building it as I ride it. This winter I plan on a full rebuild, but for now I just need transportation.
Since purchasing it, I have not been able to get it to run. The left cylinder fires fine but the right cylinder backfires through the exhaust and carburetor. It runs better with the choke closed but once the choke is opened, the RPMs ramp up and it starts backfiring.
Diagnostics I’ve done so far:
-Changed out the spark plugs
-Swapped coils and leads
-Valve lash, points, and timing
-Carb and advance mechanism rebuild
I’m beginning to wonder if it’s a sticking valve but I don’t want to pull the head until I have ruled out all other possibilities. Other clues as to what may be causing this are compression of 130psi and the plugs foul quickly. If anybody has any ideas, I would appreciate it.
I got it on EBay last month for $1475
Since then I’ve:
-Cleaned it up
-Rebuilt the carburetors
-Replaced the points
-Rebuilt the advance mechanism
-Adjusted the valves
-Adjusted the timing
-Installed new tires
-Installed a stainless steel bolt kit
-Rebuilt the brakes
-Replaced front brake cable
-Replaced all of the light bulbs
-Repaired tachometer and speedometer
This is what it looks like now
I'm still trying to decide what to do for air cleaners.
My goal right now is to get the bike running. I plan on building it as I ride it. This winter I plan on a full rebuild, but for now I just need transportation.
Since purchasing it, I have not been able to get it to run. The left cylinder fires fine but the right cylinder backfires through the exhaust and carburetor. It runs better with the choke closed but once the choke is opened, the RPMs ramp up and it starts backfiring.
Diagnostics I’ve done so far:
-Changed out the spark plugs
-Swapped coils and leads
-Valve lash, points, and timing
-Carb and advance mechanism rebuild
I’m beginning to wonder if it’s a sticking valve but I don’t want to pull the head until I have ruled out all other possibilities. Other clues as to what may be causing this are compression of 130psi and the plugs foul quickly. If anybody has any ideas, I would appreciate it.