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80cc bbk help
by: JerryScript - Apr 24, 2015 12:51:33 GMT -5
via mobile
Post by JerryScript on Apr 24, 2015 12:51:33 GMT -5
Try restricting your air intake while starting, if it helps, then you need a larger pilot jet.
The pilot jet provides fuel throughout the throttle range, the main jet only when the butterfly is open, and vacuum is high (not during starting even if you turn the throttle).
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80cc bbk help
by: JerryScript - Apr 24, 2015 11:28:30 GMT -5
via mobile
Post by JerryScript on Apr 24, 2015 11:28:30 GMT -5
The pilot jet will be the issue while starting, what size do you have in there now?
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80cc bbk help
by: JerryScript - Apr 24, 2015 9:41:25 GMT -5
via mobile
Post by JerryScript on Apr 24, 2015 9:41:25 GMT -5
96 May be too big. That size is normally used on a 100cc BBK,  is usually enough for a 80cc BBK. |
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80cc bbk help
by: JerryScript - Apr 24, 2015 0:15:18 GMT -5
via mobile
Post by JerryScript on Apr 24, 2015 0:15:18 GMT -5
If it is turning over ok, it's not the starter motor necessarily. Did you up jet your carb? Sounds like it's starving for fuel. It almost starts because it almost has enough fuel, opening the throttle at low RPM opens the butterfly allowing more air in, and starving it.
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Oil leaking
by: JerryScript - Apr 23, 2015 10:57:16 GMT -5
via mobile
Post by JerryScript on Apr 23, 2015 10:57:16 GMT -5
Clean the engine, then blow a small bit of flour on the suspect area, then run it till it leaks enough to see the source of the leak. Post a pic and we should be able to figure out where it is coming from.
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Post by JerryScript on Apr 23, 2015 10:41:16 GMT -5
Very few do a valve adjustment during PDI, assuming the factory set then right. I do set my valves during PDI, example, my 150, ccame with exhaust set at zero tight.
Is the enricher working?
Do you have to turn the throttle at all when starting it cold?
Is the plug boot new?
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Post by JerryScript on Apr 19, 2015 23:46:55 GMT -5
I always like to read about your scamping trips! Very nice pics, thanks for sharing!
Only problem with reading your scamping reports is the twitch it gives me in my throttle wrist!
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Post by JerryScript on Apr 18, 2015 23:58:24 GMT -5
Those pieces are circular, the pieces he found are rectangular, just like the probe clip inside the performance coil/boot sold by many dealers, including Scrappy's where I bought mine.
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Post by JerryScript on Apr 18, 2015 12:48:18 GMT -5
The most important thing is the spark plug ceramic should not be white. If it is, then your lean and hot, not good. If the plug ceramic is coffee brown, your good to go. Sounds like your mechanic already knows it's not fouled which would be to rich (fouled is dirty or too dark).
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Post by JerryScript on Apr 17, 2015 22:02:27 GMT -5
^^^+1 What he said!
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Post by JerryScript on Apr 17, 2015 22:00:37 GMT -5
Looking good! With those LEDs, looks like resistance is futile
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Post by JerryScript on Apr 17, 2015 15:28:57 GMT -5
Most look like a fat D. The one in my "performance" boot was rectangular with three or four windings
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Post by JerryScript on Apr 17, 2015 11:08:13 GMT -5
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Post by JerryScript on Apr 17, 2015 9:58:17 GMT -5
Only way is if you pull the plug boot when the valve cover is off. Then it could make it down the cam chain shaft. There is nothing internal that size, so it must have come from outside
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Post by JerryScript on Apr 17, 2015 9:51:37 GMT -5
"Feels hot" is subjective, you need some real data. Pull your spark plug and post a picture of the business end, you want a nice coffee brown color. You could also buy a candy thermometer, and put it in the oil filler tube right after a ride to see your actual temp.
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is usually enough for a 80cc BBK.