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Offroad => MXU => Topic started by: waterman on March 29, 2025, 09:26:09 AM

Title: MXU 300R carburetor adjustment
Post by: waterman on March 29, 2025, 09:26:09 AM

Hello, recently I replaced in my MXU 300R the carburetor. Could anyone give me please an advice, how to adjust fuel mix?

Title: Re: MXU 300R carburetor adjustment
Post by: Ruffus on March 29, 2025, 06:35:16 PM

Welcome here!
Please put a few pics of your carb in here to know what we talking about. Makes things easier.

Title: Re: MXU 300R carburetor adjustment
Post by: waterman on March 30, 2025, 11:48:06 AM

This is the new carburetor that I have installed https://www.amazon.com/BH-Motor-Carburetor-MXU-300-2009-2010/dp/B0C9J1VNB7/ref=sr_1_1_sspa?crid=16AP5I2P08VOW&dib=eyJ2IjoiMSJ9.Mket41yCd7EqhB5raO2fDgkMQF6GWwH3rfHJao4qpFTSyzE8UKXVAI5BFxDlUw1VTL7xDcfOZF4MX1eh8VfMoGhTbuCEQy2ptpscR8BZ8zDH9leTyJIN5wV4vWAFOrA_8vIXyFcc7B6K1KN9edPlwsAzKxLWEWINzfh6DN6trJ9n_2T08ySha89pZudbKKqniSgTCjyHMmZxrQFNS7v5Xw1XnzggaSKrUvXVCZZXO7FNHVYvQdNjL3RrIcZtjhHO_D7Txwpgy-I_DxY5tRBIPsngNJprcKYzztbs7Wdx9fs.2jeL52GC0FheQaLtrKMtsVV95i-vAI7_eEz_MlPXQvc&dib_tag=se&keywords=kymco+mxu+300+carburetor&qid=1743335149&sprefix=mxu+300+carb%2Caps%2C191&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1

Title: Re: MXU 300R carburetor adjustment
Post by: Ruffus on March 30, 2025, 09:10:05 PM

AFAIK (pls see pic) the only adjustment on this carb can be made in this opening (red arrow) with a special D-screwdriver.

Second regulation is with the idle wheel (black handle) to adjust your air intake.

Title: Re: MXU 300R carburetor adjustment
Post by: waterman on March 31, 2025, 10:37:30 AM

Yes I know that. But I don't know the procedure to adjust the fuel mix

Title: Re: MXU 300R carburetor adjustment
Post by: Ruffus on March 31, 2025, 06:35:44 PM

Assumed motor is running?
If YES
-turn the throttle adjuster (black knob wheel) on slack
-turn D-screw 1 1/2 turns out (appr 1300 rpm)
-turn throttle adjuster at rpms desired

Title: Re: MXU 300R carburetor adjustment
Post by: waterman on April 01, 2025, 11:35:47 AM

Thank you very much