K
Keepthedrivetommy
Guest
Hi all,
I was having this problem last october when it started going really down hill and causing major power problems. So I want to make sure that it doesnt happen again. you can refer to the original thread I created, http://www.motoredbikes.com/showthread.php?t=6955&highlight=diagram.
Ok so, I would get my bike up to top speed, 32, and then when I let off the throttle, I would hear this metal on metal clanking noise. I knew it wasnt good. so I looked at some other threads, and found that the wrist pin bushing or even the wrist pin might be shot. It turned out my piston was burned up from too lean of a fuel mixture. So I replaced the piston, cheacked the bushing and wrist pin, and both were fine, no cracks. And boom, my engine was back to life.
But now it is starting to get a little warmer, I can get my bike up to full speed again, but the metal on metal noise is still there. I have power, and the bike runs beautifully and Im using one of those oil mixtures that can be used for any air-cooled 2 stroke between 20:1 and 50:1. But the same problem is present when I get to my top rpm and let off the throttle, there is that horrible clanking noise. It lasts 2-3 seconds until the bike slows down a little.
So I know its not the wrist pin/bushing, last time I checked they were fine. Im using an appropriate fuel mixture, because this oil is appropriate for all ratios. I can't think of what the problem might be?
Any ideas gents?
Also, Im curious. Here is an example. Augi bought that sale/deal motor kit from daxa couple months back to review it. It was the 60 or 65, but he took the kit, and standard 26 in wheel bike, put em together and within 2 days, he was pulling 37 no prob. I have a 26 in wheel bike, same engine but the 70 instead, and have never been able to go over 34 without feeling like the engine's rpm's might rip it apart if I keep it at that speed for another 2 seconds. Other people say they can go 40 downhill...don't the rpms get RIDICULOUSLY HIGH AND LOUD at that speed. Might there be something seriously wrong with my bike that I have never been able to approach those speeds, even if the wind was at my back and I was going downhill, without feeling like my engine was going to explode?
PS...Im sure the simplest answer to my problem is to buy the titan...thank you to anyone who was thinking of saying that, but that answer is ruled out due to obviousness, if thats a word.
I was having this problem last october when it started going really down hill and causing major power problems. So I want to make sure that it doesnt happen again. you can refer to the original thread I created, http://www.motoredbikes.com/showthread.php?t=6955&highlight=diagram.
Ok so, I would get my bike up to top speed, 32, and then when I let off the throttle, I would hear this metal on metal clanking noise. I knew it wasnt good. so I looked at some other threads, and found that the wrist pin bushing or even the wrist pin might be shot. It turned out my piston was burned up from too lean of a fuel mixture. So I replaced the piston, cheacked the bushing and wrist pin, and both were fine, no cracks. And boom, my engine was back to life.
But now it is starting to get a little warmer, I can get my bike up to full speed again, but the metal on metal noise is still there. I have power, and the bike runs beautifully and Im using one of those oil mixtures that can be used for any air-cooled 2 stroke between 20:1 and 50:1. But the same problem is present when I get to my top rpm and let off the throttle, there is that horrible clanking noise. It lasts 2-3 seconds until the bike slows down a little.
So I know its not the wrist pin/bushing, last time I checked they were fine. Im using an appropriate fuel mixture, because this oil is appropriate for all ratios. I can't think of what the problem might be?
Any ideas gents?
Also, Im curious. Here is an example. Augi bought that sale/deal motor kit from daxa couple months back to review it. It was the 60 or 65, but he took the kit, and standard 26 in wheel bike, put em together and within 2 days, he was pulling 37 no prob. I have a 26 in wheel bike, same engine but the 70 instead, and have never been able to go over 34 without feeling like the engine's rpm's might rip it apart if I keep it at that speed for another 2 seconds. Other people say they can go 40 downhill...don't the rpms get RIDICULOUSLY HIGH AND LOUD at that speed. Might there be something seriously wrong with my bike that I have never been able to approach those speeds, even if the wind was at my back and I was going downhill, without feeling like my engine was going to explode?
PS...Im sure the simplest answer to my problem is to buy the titan...thank you to anyone who was thinking of saying that, but that answer is ruled out due to obviousness, if thats a word.
