Hello, almighty forum.
I'm having problems with my beloved airhead. Here are the symptoms:
1. It starts right up from cold, no need for choke (always been like this)
2. Runs fine, except for sputtering somewhere between 2000 and 2500 RPM
3. After having been properly warmed up it starts to sputter, and the idle drops so that i have to constantly keep throttling it to keep it from dying (which i sometimes can't)
4. The exhaust pops when i try to start it again (which sometimes works)
5. The spark plugs have been a bit all over the place seeing as i have tried different carb settings, but generally they seem to indicate an engine running to rich
6. After it has cooled down again, it starts right up again and seemingly runs fine until the problems recur
These are the things i have tried:
1. Cleaned carbs and reassembled them correctly
2. Installed new fuel filters and checked fuel flow
3. Adjusted the carbs (no vacuum ports, so only by ear and feel, starting from baseline (which i was told was 0.75 out on the mix screw..?) I have tried several settings, both richer and leaner...)
4. Adjust valves and rocker arm end play
5. Set timing (A little difficult. Could be because the cam chain is worn?)
6. Swapped coils and spark plug wires (from another R75/5 awaiting restoration)
Newbie questions for the almighty forum:
- There seems to be a problem with the valves... After i have set them correctly (intake = 0.10 mm, exhaust 0.20 mm), they seem to not want to stay there. What does this indicate, and could it be the source of the problems?
- Could it be the condenser or the points?
- Could it be a carb problem?
I bought the bike in May, so i don't know a lot about it other than what i have been told by previous owners. It had an engine overhaul late 2011, where the valve seats were changed so it can run on unleaded fuel. The rocker arms were also supposedly changed.
I'm having problems with my beloved airhead. Here are the symptoms:
1. It starts right up from cold, no need for choke (always been like this)
2. Runs fine, except for sputtering somewhere between 2000 and 2500 RPM
3. After having been properly warmed up it starts to sputter, and the idle drops so that i have to constantly keep throttling it to keep it from dying (which i sometimes can't)
4. The exhaust pops when i try to start it again (which sometimes works)
5. The spark plugs have been a bit all over the place seeing as i have tried different carb settings, but generally they seem to indicate an engine running to rich
6. After it has cooled down again, it starts right up again and seemingly runs fine until the problems recur
These are the things i have tried:
1. Cleaned carbs and reassembled them correctly
2. Installed new fuel filters and checked fuel flow
3. Adjusted the carbs (no vacuum ports, so only by ear and feel, starting from baseline (which i was told was 0.75 out on the mix screw..?) I have tried several settings, both richer and leaner...)
4. Adjust valves and rocker arm end play
5. Set timing (A little difficult. Could be because the cam chain is worn?)
6. Swapped coils and spark plug wires (from another R75/5 awaiting restoration)
Newbie questions for the almighty forum:
- There seems to be a problem with the valves... After i have set them correctly (intake = 0.10 mm, exhaust 0.20 mm), they seem to not want to stay there. What does this indicate, and could it be the source of the problems?
- Could it be the condenser or the points?
- Could it be a carb problem?
I bought the bike in May, so i don't know a lot about it other than what i have been told by previous owners. It had an engine overhaul late 2011, where the valve seats were changed so it can run on unleaded fuel. The rocker arms were also supposedly changed.