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Post by lain on Mar 31, 2015 12:37:59 GMT -5
Any one knows if i need to recheck the torque on the engine head nuts, after i'll end the engine break in? I don't, but it couldn't hurt to do it when you check your valve lash. I check them every time I check my valves. I just give them a little push to see if they are still as tight as they were, mine have never come loose though, but results may vary! The two bolts on the side of my engine keep coming loose though, and I don't understand why. Every time I check them they are ready to unscrew by hand practically. |
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Post by scooter on Mar 31, 2015 16:27:01 GMT -5
I don't, but it couldn't hurt to do it when you check your valve lash. I check them every time I check my valves. I just give them a little push to see if they are still as tight as they were, mine have never come loose though, but results may vary! The two bolts on the side of my engine keep coming loose though, and I don't understand why. Every time I check them they are ready to unscrew by hand practically. It's vibration unless they are stripped. Have you put lock washers on them? |
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Post by lain on Mar 31, 2015 16:35:34 GMT -5
I check them every time I check my valves. I just give them a little push to see if they are still as tight as they were, mine have never come loose though, but results may vary! The two bolts on the side of my engine keep coming loose though, and I don't understand why. Every time I check them they are ready to unscrew by hand practically. It's vibration unless they are stripped. Have you put lock washers on them? Nope, never had any washers on them when I took them out of the 50cc engine when I did my BBK upgrade. They tighten up nice whenever I do tighten them, but every now and then when I take the shroud off to check stuff I find them hand loose. |
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Post by scooter on Mar 31, 2015 21:12:52 GMT -5
It's vibration unless they are stripped. Have you put lock washers on them? Nope, never had any washers on them when I took them out of the 50cc engine when I did my BBK upgrade. They tighten up nice whenever I do tighten them, but every now and then when I take the shroud off to check stuff I find them hand loose. I put lock washers on everything. They should keep your bolts from coming loose. Bolt, lock washer, washer... same for nuts. washer, lock washer, nut. |
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Post by gingel on Apr 4, 2015 2:55:16 GMT -5
I hope that these bolts will not get loose. I took pictures of the plug, now that i did around 500KM (310 miles). What do you think about the color of the plug?   |
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Post by lain on Apr 4, 2015 7:39:50 GMT -5
I hope that these bolts will not get loose. I took pictures of the plug, now that i did around 500KM (310 miles). What do you think about the color of the plug? Maybe slightly rich. You are a bit more brown than I would be comfortable with, and the heat marks on the plug threads don't reach far enough. Did you clean the threads before taking those pics? Usually with a good plug you get burn marks up to about 2 threads down from the end of the tip of the plug electrode and a sort of light brown like coffee ice cream colored but lighter... But then again this plug doesn't seem too far on the rich side, and I certainly would keep using it, maybe tweak the air/fuel slightly but that's it. |
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Post by JoeyBee on Apr 4, 2015 21:08:54 GMT -5
I agree with lain. The plug looks very good. It does look slightly on the rich side, but for air cooled engines we want to run richer instead of lean. With it running richer the engine is getting cooled, instead of running too hot from being lean. |
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Post by gingel on Apr 5, 2015 6:23:34 GMT -5
Maybe i'll try to lean the mixture a bit, see what it does. lain, i didn't understand what you said about the burn marks on the plug threads. I didn't clean the plug before taking the pictures. Do you have a picture of a plug with these burn marks on the plug threads? Thank you. |
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Post by JoeyBee on Apr 5, 2015 6:42:49 GMT -5
I think he was referring to the blackening of the treads similar to my plug.  |
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Post by gingel on Apr 5, 2015 6:56:11 GMT -5
Thank you JoeyBee. Your plug looks perfect. If you have a richer mixture, can it prevent from the threads to have these burn marks? |
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Post by lain on Apr 5, 2015 8:01:04 GMT -5
Richer mixture means cooler engine, which means the heat will not reach that far on the plug. The burn marks on spark plugs normally come from heat, not actual burning of the plug. You would see the burn marks reach far on a plug that was running lean, or shorter burn marks if it is richer. I'd personally tweak the engine to be a little bit leaner than it is, but I suppose there's no harm and may even benefit from staying at the current slightly rich setting if you are in an area that is normally warm or hot.
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Post by gingel on Apr 6, 2015 9:07:18 GMT -5
Thank you for the explanation.
I would like to replace all of the vacuum lines, and i wonder what is the correct I.D ?
Is it I.D of 4mm(5/32inch) or 5mm(3/16 inch) ?
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Post by JoeyBee on Apr 6, 2015 9:15:00 GMT -5
My TaoTao uses 3/16".
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Post by geh3333 on Apr 10, 2015 4:06:54 GMT -5
I like the looks of the plug , yes its a little on the rich side . is the scoot smoking at all ? Any bogging ? If no to both , I would leave it alone. I would also see how many miles per gallon you are getting.
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Post by gingel on Apr 11, 2015 8:53:06 GMT -5
I like the looks of the plug , yes its a little on the rich side . is the scoot smoking at all ? Any bogging ? If no to both , I would leave it alone. I would also see how many miles per gallon you are getting. I read your post about hitting that deer. I'm glad to hear that you are ok and well. I hope you'll be riding again soon.  The scooter is not smoking or bogging, but i did notice that sometimes when i'm standing with the scooter and engine is on, the exhaust gas smell like fuel. I checked the fuel consumption a few times, but i need to drive it more to be more accurate. i used the scooter with a lot of stop and go, so i got a figure of around 63 MPG. Without so many stop and go, i think i can get around 75-77 MPG. This is about the same fuel consumption i had before the rebuild. Do you think it will get better? (i only done around 400 miles) I have a CV carburetor with i think a  main jet and 35 pilot jet. (These are the stock jets). Regarding the oil consumption, it's no longer drink oil like it did. Before the rebuild it got to a point where the oil consumption was almost 1 quart for every 620 miles. (strangely it didn't smoke). After the rebuild it burned a very small amount of oil at the beginning, but now the oil level is constant, and it's still almost at the top level (i didn't add more oil since i first started it). I understand that it's nomral for a new engine to burn a small amount of oil at the beginning. |
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main jet and 35 pilot jet. (These are the stock jets).