I was previously running the CNS carburetor on my 70cc Thatsdax engine and tried tuning that to no avail. I then gave up and went back to the NT carb and ordered a 71 and 72 jet from dellorto direct. I tried a 71 first and it didn't seem to make much a difference compared to the stock #70 although the engine did seem to run more smoothly. I checked the spark plug and it was still very oily and dark.
Today, I swapped out the 71 for the 72 size jet and it seemed to run a bit more smoothly and the engine started to 2 stroke more often (it didn't much with the stock and 71 jet). I checked the plug again right after running the engine at full throttle and it was still very oily.
I then checked the air filter and it was saturated with oil so I cleaned it. The only other problem that I can see is that I have the spark plug (An NGK B5HS) gapped to .015" when it may run better with a wider gap. Should I look at switching to a B6HS since it's warmer out? I haven't run it since cleaning the air filter so that might help. Please let me know what you would do.
Thanks,
Techbiker
Today, I swapped out the 71 for the 72 size jet and it seemed to run a bit more smoothly and the engine started to 2 stroke more often (it didn't much with the stock and 71 jet). I checked the plug again right after running the engine at full throttle and it was still very oily.
I then checked the air filter and it was saturated with oil so I cleaned it. The only other problem that I can see is that I have the spark plug (An NGK B5HS) gapped to .015" when it may run better with a wider gap. Should I look at switching to a B6HS since it's warmer out? I haven't run it since cleaning the air filter so that might help. Please let me know what you would do.
Thanks,
Techbiker