Introduces extra fuel for cold starts.
Spray aerosol carburetor cleaner through every passage, passage mouth, and jet. Ensure fluid exits cleanly from the corresponding exit hole.
Flip the carburetor over and remove the four screws securing the float bowl.
Remove the single screw holding the brass needle valve seat and pull the seat out. Inspect the tiny fuel filter screen attached to the rear of the seat. 4. Jet Removal
. This data is vital because the BDS26 uses slightly different settings for the front and rear carburetors to account for engine heat and airflow variations Key Technical Specifications (GV250 Standard) Carburetor Type MIKUNI BDS 26 (Double) Main Jet (M.J.) : Front 90 / Rear 87.5 Jet Needle (J.N.) : 2nd clip position for both : 1,450 – 1,550 rpm Float Height Pilot Jet (P.J.) Maintenance & Service Tips Ultrasonic Cleaning
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Submerge the aluminum bodies and brass jets in a carburetor cleaning solution or an ultrasonic cleaner filled with a 50/50 mix of simple green and water for 30–45 minutes.
Tap the side of the bowl gently with a plastic mallet if the gasket is stuck. Lift the bowl straight off.
Remove the four JIS screws on the bottom.
Once mounted back onto the engine, perform these final steps to optimize performance. Synch and Idle Adjustment
What (coughing, leaking, stalling) are you trying to fix?
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Guide to Rebuild Mikuni BDST Carburetors - LiteTek
Thread the mixture screw in until it lightly seats, then back it out to the factory default specification (e.g., 2.25 turns). 2. Setting the Float Height
If the distance is not between 13.0 mm and 14.0 mm, carefully bend the small metal tang on the float arm using needle-nose pliers until the specification is reached. 3. Slide and Top Cap Reassembly
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Introduces extra fuel for cold starts.
Spray aerosol carburetor cleaner through every passage, passage mouth, and jet. Ensure fluid exits cleanly from the corresponding exit hole.
Flip the carburetor over and remove the four screws securing the float bowl.
Remove the single screw holding the brass needle valve seat and pull the seat out. Inspect the tiny fuel filter screen attached to the rear of the seat. 4. Jet Removal
. This data is vital because the BDS26 uses slightly different settings for the front and rear carburetors to account for engine heat and airflow variations Key Technical Specifications (GV250 Standard) Carburetor Type MIKUNI BDS 26 (Double) Main Jet (M.J.) : Front 90 / Rear 87.5 Jet Needle (J.N.) : 2nd clip position for both : 1,450 – 1,550 rpm Float Height Pilot Jet (P.J.) Maintenance & Service Tips Ultrasonic Cleaning
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
Submerge the aluminum bodies and brass jets in a carburetor cleaning solution or an ultrasonic cleaner filled with a 50/50 mix of simple green and water for 30–45 minutes.
Tap the side of the bowl gently with a plastic mallet if the gasket is stuck. Lift the bowl straight off.
Remove the four JIS screws on the bottom.
Once mounted back onto the engine, perform these final steps to optimize performance. Synch and Idle Adjustment
What (coughing, leaking, stalling) are you trying to fix?
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Guide to Rebuild Mikuni BDST Carburetors - LiteTek
Thread the mixture screw in until it lightly seats, then back it out to the factory default specification (e.g., 2.25 turns). 2. Setting the Float Height
If the distance is not between 13.0 mm and 14.0 mm, carefully bend the small metal tang on the float arm using needle-nose pliers until the specification is reached. 3. Slide and Top Cap Reassembly
