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Backfiring
by: geh3333 - Jan 7, 2015 23:32:18 GMT -5
via mobile
Post by geh3333 on Jan 7, 2015 23:32:18 GMT -5
Bashen is correct you have to be a motorhead to know this stuff it is the valves leaking by the seals after you shut it down and the metals cool. Then It will smoke at start up until some expansion occurs as the parts heat up and stop the sippish and will keep on doing this until you fix it. So if you don't fix it always check you oil level otherwise you may be running with low oil level and will do real damage. Yes I heard the popping, also you have idling way to high the idle should only be 1500-1800 after it warms up. Also after you start it cold does the idle ever drop or does it always idle that high and never drop? Also the rear wheel should not be spinning after say 5 minutes if it is Lower the idle so that the rear wheel Barely Wants to turn or not turn at all. Alleyoop That makes sense. What about leaky gaskets? Would they cause the issue I am having with the popping and/or smoke on startup after long periods of sitting? I haven't changed to new gaskets the last couple times I cracked everything open down to the piston. Last time I saw the head gasket it looked like there was shavings of it coming off. Also noticing lower compression as of lately but not sure if it's just due to the extremely cold weather causing parts to not be sealed entirely until they warm up or something along those lines. Yes it drops, usually around 4-5 minutes in this weather. The autoenricher is brand new with the carb I just installed today. The video did not go far enough to see it slow down. It was about 15 degrees during the video. I imagine it is hard for the needle to heat up when freezing cold gas is pumping by it. The wheel does not spin at all during the idle or startup. If I lower the idle the engine cannot stay alive after the autoenricher kicks in until after a ride when it is this cold out. Even in cold weather my scoot will idle around 1500 rpms even a little lower . I use to have to let it warm up forever and sometimes even take it for a ride before it would idle in this cold weather , however after finding I had a big vaccum leak it solved that instantly. U didn't install the new rings yet did you ? If not it still could be the rings leaking. That is the oil loss. |
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Post by lain on Jan 7, 2015 23:40:33 GMT -5
That makes sense. What about leaky gaskets? Would they cause the issue I am having with the popping and/or smoke on startup after long periods of sitting? I haven't changed to new gaskets the last couple times I cracked everything open down to the piston. Last time I saw the head gasket it looked like there was shavings of it coming off. Also noticing lower compression as of lately but not sure if it's just due to the extremely cold weather causing parts to not be sealed entirely until they warm up or something along those lines. Yes it drops, usually around 4-5 minutes in this weather. The autoenricher is brand new with the carb I just installed today. The video did not go far enough to see it slow down. It was about 15 degrees during the video. I imagine it is hard for the needle to heat up when freezing cold gas is pumping by it. The wheel does not spin at all during the idle or startup. If I lower the idle the engine cannot stay alive after the autoenricher kicks in until after a ride when it is this cold out. Even in cold weather my scoot will idle around 1500 rpms even a little lower . I use to have to let it warm up forever and sometimes even take it for a ride before it would idle in this cold weather , however after finding I had a big vaccum leak it solved that instantly. U didn't install the new rings yet did you ? If not it still could be the rings leaking. That is the oil loss. No, I haven't installed the new rings yet. I haven't had the weather to do it. It has been below freezing for a while now, and I can't spend the 2-3 hours straight working on it in this weather to do it. The popping noise worries me the most. It seems to be getting worse and I don't want to damage more parts and keep getting stranded places and have to push it. Sure, it starts and moves really fast and can get me places, but I don't want to end up damaging more parts or having a total breakdown. I want to fix this so it works as best as possible in all conditions. |
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Backfiring
by: geh3333 - Jan 7, 2015 23:46:31 GMT -5
via mobile
Post by geh3333 on Jan 7, 2015 23:46:31 GMT -5
Even in cold weather my scoot will idle around 1500 rpms even a little lower . I use to have to let it warm up forever and sometimes even take it for a ride before it would idle in this cold weather , however after finding I had a big vaccum leak it solved that instantly. U didn't install the new rings yet did you ? If not it still could be the rings leaking. That is the oil loss. No, I haven't installed the new rings yet. I haven't had the weather to do it. It has been below freezing for a while now, and I can't spend the 2-3 hours straight working on it in this weather to do it. The popping noise worries me the most. It seems to be getting worse and I don't want to damage more parts and keep getting stranded places and have to push it. Sure, it starts and moves really fast and can get me places, but I don't want to end up damaging more parts or having a total breakdown. I want to fix this so it works as best as possible in all conditions. I def agree , how does ur plug look ? Were your rpms dropping while it was popping ? |
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Backfiring
by: alleyoop - Jan 7, 2015 23:47:09 GMT -5
Post by alleyoop on Jan 7, 2015 23:47:09 GMT -5
Just a F.Y.I if the rings are leaking it would smoke all the time not just at start up. If it smokes as you ride then I would say it is your rings that are shot. But if it just happens after a shut down and only smokes for a little bit until it warms up then it is not your rings.
Alleyoop
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Backfiring
by: geh3333 - Jan 7, 2015 23:56:03 GMT -5
via mobile
Post by geh3333 on Jan 7, 2015 23:56:03 GMT -5
That's true , u should get oil burning when it passes the rings also . he's losing a lot of oil it sounds as if a front end teardown is in the near future .
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Backfiring
by: alleyoop - Jan 8, 2015 0:02:01 GMT -5
Post by alleyoop on Jan 8, 2015 0:02:01 GMT -5
Lain, for the popping at idle feed it more fuel you have a BBK and you did not change the pilot jet so it is most likely to lean for the bbk and free flow filter and exhaust. So turn the Fuel Ratio mixture screw Counter clockwise 1/4 at a time and see if you can at least get the popping to stop. If you do then you can see and test HOW MANY turns it is out and that will help to tell you what size bigger pilot jet you need.
Alleyoop
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Post by geh3333 on Jan 8, 2015 0:36:03 GMT -5
I thought that was mentioned earlier , I could be wrong . that's one of the first things to check when you hear popping. We were talking about a vaccum leak causing a lean condition making the popping noise . if you haven tuned the carb in yet u def need to do it . hopefully that's your problem " that is with the popping"
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Backfiring
by: jerseyboy - Jan 8, 2015 8:14:17 GMT -5
Post by jerseyboy on Jan 8, 2015 8:14:17 GMT -5
this thread is getting hard to keep track of....its like a vortex spiraling out of control..lol
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Post by lain on Jan 8, 2015 11:03:56 GMT -5
jerseyboy yeah I know, I am trying to keep the subject on the popping/backfiring but figuring out what it is keeps us all over the place. geh3333 I will try to check for leaks, I don't have brake cleaner anymore like it says to use in the videos I've found, can I use something else to check, maybe wd40 or no because it is flammable? alleyoop Does the mixture screw have a minimum and maximum? It seems it just screws forever in either direction.
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Backfiring
by: alleyoop - Jan 8, 2015 12:22:31 GMT -5
Post by alleyoop on Jan 8, 2015 12:22:31 GMT -5
Are you sure your know which is the mixture screw...LOL about 8 turns counter clockwise and it will come out.
It appears you are turning whatever screw all over the place and you are not telling us what turning it one way did and or turning the other way did EXPLAIN IN DETAIL VERY IMPORTANT to know how the motor acted when you where turning it in either direction. How the motor acted will help in the diagnose.
STICK TO ONE THING AT A TIME, Get one thing fixed then move on to another.
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Post by lain on Jan 8, 2015 12:39:27 GMT -5
Are you sure your know which is the mixture screw...LOL about 8 turns counter clockwise and it will come out. It appears you are turning whatever screw all over the place and you are not telling us what turning it one way did and or turning the other way did EXPLAIN IN DETAIL VERY IMPORTANT to know how the motor acted when you where turning it in either direction. How the motor acted will help in the diagnose. STICK TO ONE THING AT A TIME, Get one thing fixed then move on to another. I am turning the mixture screw. When I turn it it does not do much to the popping but does make the engine rev higher or lower. I have a friend over who has a better phone than the last one I used, I'm going to take a video while I adjust the screw. |
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Backfiring
by: alleyoop - Jan 8, 2015 13:25:45 GMT -5
Post by alleyoop on Jan 8, 2015 13:25:45 GMT -5
Well turning that mixture screw you want to set it where you get the HIGHEST IDLE.
QUESTION:
After the motor warms up say 5 minutes of idling does it POP MORE OR LESS.
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Post by lain on Jan 8, 2015 13:28:51 GMT -5
The video uploads are going to take forever, they were recorded in HD. Youtube says upload will take an hour and a half...
It seems now it is smoking constantly, more when revving. The problem seems to be getting worse, nomatter how much fuel I mix into the carb I still get the popping, and now I have constant smoke! I adjusted the fuel screw out (counterclockwise) to the point where I could see the air behind the scoot ripple like how it does when theres gas in the air, at that point the engine stalled. I tried starting it up, it wouldn't idle, so I turned up the idle when I got it on again until it stayed alive. There's still popping all the time and now there's smoke all the time.
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Post by lain on Jan 8, 2015 13:29:40 GMT -5
Well turning that mixture screw you want to set it where you get the HIGHEST IDLE. QUESTION: After the motor warms up say 5 minutes of idling does it POP MORE OR LESS. Less, as you will see when the video finishes uploading, will take a while. |
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Backfiring
by: alleyoop - Jan 8, 2015 13:51:53 GMT -5
Post by alleyoop on Jan 8, 2015 13:51:53 GMT -5
I think what you are seeing is WHITE SMOKE to much fuel Turn the Fuel Ratio Screw Clockwise. Actually do this
Turn it clockwise until it stops then turn it counter clockwise 2 1/2 turns.
Alleyoop
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..BAD TO THE BONE..
