kennymcmack
Cadet
- Joined
- Apr 27, 2009
- Messages
- 7
Suzuki DT60 1984
So I was cruising around yesterdayat about 90% throttle and all of sudden the RPM's dropped to about 30% (I don't have a tachometer so I will just describe the RPMs in percentage). I came back to idle then gradually revved up again. Everything is normal up to about 30%. As I move the throttle to 50%, 75%, and 100% throttle, the RPMs don't increase, they just stay at the same level as 30%. Anyone know what might this be?
Back at the garage, I've been looking at the mechanisms and linkages in the engine for a while and noticed that when I throttle up, 2 linkages are moving; 1 linkage is connected right to the carb and it moves through the entire range of motion, the other linkage is connected to a rotating plate under the flywheel and only moves between 30% and 100% throttle position. (I think this advances the timing or something. I don't know many details about the engine operation) This rotating plate does not start moving till the throttle linkage gets to about 30%. So I believe the problem has something to do with this rotaing plate, since the engine works fine up to this throttle setting.
Also, I took the flywheel off and I discoved there was a woodruff key clinging on to the magnet in the flywheel. I don't know where this came from, because there is already an identical woodruff key in the shaft, which keeps the flywheel aligned.
Also, I just talked to my neighbor and he suggested that it may be the main venturi. He says there are two fuel inputs in the carbs, one for idleing and one for the rest of the throttle range. He said the main needle might be clogged which would explain why I can't accelerate but I can idle normally. What do yall think?
Thanks, Kenny.
So I was cruising around yesterdayat about 90% throttle and all of sudden the RPM's dropped to about 30% (I don't have a tachometer so I will just describe the RPMs in percentage). I came back to idle then gradually revved up again. Everything is normal up to about 30%. As I move the throttle to 50%, 75%, and 100% throttle, the RPMs don't increase, they just stay at the same level as 30%. Anyone know what might this be?
Back at the garage, I've been looking at the mechanisms and linkages in the engine for a while and noticed that when I throttle up, 2 linkages are moving; 1 linkage is connected right to the carb and it moves through the entire range of motion, the other linkage is connected to a rotating plate under the flywheel and only moves between 30% and 100% throttle position. (I think this advances the timing or something. I don't know many details about the engine operation) This rotating plate does not start moving till the throttle linkage gets to about 30%. So I believe the problem has something to do with this rotaing plate, since the engine works fine up to this throttle setting.
Also, I took the flywheel off and I discoved there was a woodruff key clinging on to the magnet in the flywheel. I don't know where this came from, because there is already an identical woodruff key in the shaft, which keeps the flywheel aligned.
Also, I just talked to my neighbor and he suggested that it may be the main venturi. He says there are two fuel inputs in the carbs, one for idleing and one for the rest of the throttle range. He said the main needle might be clogged which would explain why I can't accelerate but I can idle normally. What do yall think?
Thanks, Kenny.