I just bought a ‘76 bike and noticed that on idle, the right cylinder didn’t sound the same as the left one (dual exhaust). Being new to the bike I started checking some things out. I took my infra gun out and measured the temperatures of the header pipes. The left side measured high one hundreds to just over 200 degrees F. On the right side the pipe was barely 80 degrees.
I pulled the plugs and they looked ok. I swapped them from side to side and the same result - dead on the right side. I did a quick compression test and both cylinders were around 160 psi. The bike has a Pamco ignition system. I ran the engine for a minute more and found the right plug was a bit wet with fuel.
I’m puzzled on this one since I have compression, seem to have fuel and should have spark, otherwise the left side shouldn’t be running.
I’ll check spark plug leads tomorrow and will check carbs and the rest of the fuel system. The bike does not have stock carbs. I’ll double check the make and model tomorrow (flat slide carbs). Also noticed on a cold start with both chokes pulled, as soon as it started, if I pushed the right choke it, the bike would still idle. If I pushed the left choke in, the bike would immediately die. I tried adjusting the mixture screws but that didn’t seem to make a difference.
Throttle response seems good and on the road it seems to gave ample power. The problem appears to be at idle.
Any ideas what might be causing this? I’m a newbie so please be kind .
I pulled the plugs and they looked ok. I swapped them from side to side and the same result - dead on the right side. I did a quick compression test and both cylinders were around 160 psi. The bike has a Pamco ignition system. I ran the engine for a minute more and found the right plug was a bit wet with fuel.
I’m puzzled on this one since I have compression, seem to have fuel and should have spark, otherwise the left side shouldn’t be running.
I’ll check spark plug leads tomorrow and will check carbs and the rest of the fuel system. The bike does not have stock carbs. I’ll double check the make and model tomorrow (flat slide carbs). Also noticed on a cold start with both chokes pulled, as soon as it started, if I pushed the right choke it, the bike would still idle. If I pushed the left choke in, the bike would immediately die. I tried adjusting the mixture screws but that didn’t seem to make a difference.
Throttle response seems good and on the road it seems to gave ample power. The problem appears to be at idle.
Any ideas what might be causing this? I’m a newbie so please be kind .