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07-17-2017, 09:56 AM | #1 |
Join Date: Mar 2016
Posts: 44
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Main Jet Upgrade did not work at all
I tried rejetting two carbs I have. When trying different jets, all led to the scooter bogging down under full throttle. The only jet I have that works properly is not marked so I don't know what size it is. I have a 24mm and 26mm carb. The unmarked jet works best in the 26mm carb. Any ideas of why the other jets led to the bogging down in both carbs?
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07-17-2017, 07:38 PM | #2 |
Join Date: Mar 2010
Location: Houston area
Posts: 945
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Can you tell by looking at the holes if the numbered jets are bigger than in the original un-numbered jet? You may be able to see that with a magnifying glass.
-Did you take a look at your spark plug tip after running the numbered jets to see if they made your insulator darker or lighter? -jetting is really trial and error, but spark plug readings can speed up the process a lot.
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"Beer never broke my heart" - Luke Combs |
07-18-2017, 06:55 AM | #3 |
Join Date: Dec 2013
Location: Western New York
Posts: 454
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What size jets have you tried? What other changes have been made to your intake/exhaust system? Since you mentioned 24 and 26 mm carb....I presume it's a 150cc scoot.
If the unmarked jet is the original, it is probably in the 105 to 108 range. If you are changing it out with a 120 or larger, is no wonder you're having problems. Need more info from you, to be helpful. |
07-18-2017, 12:05 PM | #4 |
Join Date: Mar 2016
Posts: 44
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Thanks for the replies guys. I was trying the larger jets, which is probably why it was bogging down. I'm still learning, so forgive me. I had the mentality that larger jet means more fuel, more power. But it looks like the 105 range is where I belong.
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07-19-2017, 07:06 AM | #5 | |
Join Date: Dec 2013
Location: Western New York
Posts: 454
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Quote:
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07-19-2017, 12:11 PM | #6 | |
Join Date: Mar 2016
Posts: 44
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Quote:
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07-18-2017, 07:51 PM | #7 |
Join Date: Mar 2010
Location: Houston area
Posts: 945
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The carb on my 125Cc scoot is a Keihin clone, so my jet numbers correspond to different sizes than your gy6.
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"Beer never broke my heart" - Luke Combs |
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