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Post by colddog on Oct 5, 2015 17:10:22 GMT -5
So I got my scooter running for a week or two and today it decides to be a snitch again and starts acting up, I put a new wire and spark plug. New carb with #75 jet and #35. New CDI new rectifier. And now it bogs out adjusted the air and fuel mixture, nothing. Idle screw nothing. Even has a new petcock/diaphragm. I have no clue what's going on a lil help would help in so many ways. Also has new fuel filter and lines.
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Post by katastroff on Oct 5, 2015 17:22:37 GMT -5
Take all of those new parts off, then reinstalled them 1 at the time and see witch one will give you those symtoms.
Not all carbs of the same size will give you the same performance.
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Post by colddog on Oct 5, 2015 17:29:44 GMT -5
I'll try that and I'll let you know what happens thank you
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Post by colddog on Oct 5, 2015 17:38:27 GMT -5
Also the old carb had #33 and #18 jets on it, while the new has #75 #35 pretty big difference maybe I'm overlooking something? Friend gave me an air intake might try it after I reinstalled everything and if its working better to see if it works out fine. Also do you think it needs a valve adjustment I have not been able to do it cause I don't have the tool to measure it, heard it should be 00.3 and 00.4. Not sure though.
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Post by katastroff on Oct 5, 2015 17:54:46 GMT -5
The redneck way to check your valves is with a cola can. Cut a piece of it and use it as a feeler gauge, the thickness is between .002 and .003 witch is a very acceptable valve lash.
P.S.: A beer can will work too.
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Post by colddog on Oct 5, 2015 17:57:46 GMT -5
The redneck way to check your valves is with a cola can. Cut a piece of it and use it as a feeler gauge, the thickness is between .002 and .003 witch is a very acceptable valve lash. P.S.: A beer can will work too. You my friend are one heck of a life saver. Thank you so much I'll go get an empty bee.... Errr soda can and try it XD |
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Post by paulmohr on Oct 5, 2015 18:46:46 GMT -5
A 75 main jet sounds about right, but the 35 pilot jet might be a bit big. Can you turn your air fuel screw all the way in without the engine dying? If you can the pilot jet is too big.
A 33 main jet and 18 pilot jet I think would be waaaay lean. I didn't even know you could get a 33 main jet. That would be more the size of a stock pilot jet. Maybe it was a carb that uses a different numbering system, they are not all the same?
Also don't forget about the metering rod, spring and diaphragm. That could also cause it to bog down under a load.
I agree with Kat, try swapping out parts one at a time to see if you can isolate which part might be causing the problem. If your scooter truly had a 33 main jet and 18 pilot jumping to a 75 and a 35 is a HUGE step. However normally with a stock carb I think they run around 75 main and 31-33 pilot. I have only worked on a few scooters though so I could be wrong. Maybe someone with more experience can confirm or correct me.
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Post by colddog on Oct 5, 2015 18:52:04 GMT -5
A 75 main jet sounds about right, but the 35 pilot jet might be a bit big. Can you turn your air fuel screw all the way in without the engine dying? If you can the pilot jet is too big. A 33 main jet and 18 pilot jet I think would be waaaay lean. I didn't even know you could get a 33 main jet. That would be more the size of a stock pilot jet. Maybe it was a carb that uses a different numbering system, they are not all the same? Also don't forget about the metering rod, spring and diaphragm. That could also cause it to bog down under a load. I agree with Kat, try swapping out parts one at a time to see if you can isolate which part might be causing the problem. If your scooter truly had a 33 main jet and 18 pilot jumping to a 75 and a 35 is a HUGE step. However normally with a stock carb I think they run around 75 main and 31-33 pilot. I have only worked on a few scooters though so I could be wrong. Maybe someone with more experience can confirm or correct me. Currently working on reinstalling parts one at a time, thanks for the help and yea I found it weird those where the numbers on the main and pilot jet. |
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Post by colddog on Oct 5, 2015 19:37:01 GMT -5
Okay uninstalled and reinstalled everything one by one, noticed that it turns on faster now but it still bogs out, I'll have the check the diaphragm on the carb.
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Post by colddog on Oct 9, 2015 20:42:30 GMT -5
It was the valves guys took my time and fixed it now it an idle till it run out of fuel! Just gotta adjust the carburetor.
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Post by colddog on Oct 10, 2015 10:58:55 GMT -5
It's working like a dream now thank you all for your help. You guys have been amazing.
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