Honda 400ex Carburetor Float Adjustment
Honda 400ex Carburetor Float Adjustment Kit
Few things can stop your quad in its tracks faster than a bad carburetor. With the highest quality 2003 Honda TRX400EX carburetor and OEM parts from our inventory, you know you can trust your repair. Even better, because we have the lowest prices on 2003 Honda TRX400EX carburetor and OEM parts, you can likely afford other essential parts. Haha, i thought my float was stuck, so after spending $22 on a new float needle, about 4 separate cleanings, and then a final 4 hour totall disassembly and soak in heavy duty carb cleaner it still poured gas out the overflow tube. I was totally stumped. The overflow screw was balls tight so i. Pilot Screw Adjustment for the Recon 250 ('97 and up) This may also be suitable information for the same year 250SX quad. Note:-The pilot screw is factory pre-set. Adjustment is not necessary unless the carburetor is overhauled or new pilot screws are installed.-The engine must be warm for accurate adjustment. Modified carburetor may cause the engine to overheat, and result in serious engine damage. To have your engine’s carburetor modified for high elevation use, contact an authorized Honda Power Equipment Dealer near you for assistance. To find a dealer near you, go to powerequipment.honda.com or call Honda Customer Relations at 770-497-6400.
1999 Honda 400ex Carburetor
This may also be suitable information for the same year 250SX quad.
Note:
-The pilot screw is factory pre-set. Adjustment is not necessary unless the carburetor is overhauled or new pilot screws are installed.
-The engine must be warm for accurate adjustment. Ten minutes of stop-and-go riding is sufficient.
-Use a tachometer with gradations of 50 rpm or smaller that will accurately indicate 50 rpm change.
1. Turn the pilot screw clockwise until it seats lightly, then back it out to the specification given.
CAUTION: Damage to the pilot screw seat will occur if the pilot screw is tightened against the seat.
TOOL:
Pilot screw wrench 07908-4220201
INITIAL OPENING:
'97 (except California type): 2 7/8 turns out
'97 CA type: 2 3/4 turns out
'98 - 2001: 2 5/8 turns out
After 2001: 2 turns out
2. Warm the engine up to operating temp.
3. Stop the engine and connect a tachometer according to the tach. manufacturer's instructions.
4. Start the engine and adjust the idle speed with the throttle stop screw.
IDLE SPEED: 1,400 +/- 100 rpm
5. Turn the pilot screw in or out slowly to obtain the highest engine speed.
6. Readjust the idle speed with the throttle stop screw
7. Turn the pilot screw in gradually until the engine speed drops 100 rpm.
8. Turn the pilot screw counterclockwise the number of specified turns.
FINAL OPENING:
'97 (except CA type) 3/4 turn out
'97 CA type/'98-2001: 7/8 turn out
After 2001: 1/2 turn out
9. Readjust the idle speed with the throttle stop screw.
For those who do not know, the throttle stop screw is on the right side of the carb. right behind the mounting stud where the carb. attaches to the intake rubber.
The pilot screw is on the front center underneath side close to the engine cylinder.
The above info. was taken from Honda's '97-'04 Recon service manual, and I hope this helps many. Print it out, and get it covered with your greasy fingerprints, and then throw it away!
I do not have a tach or a pilot screw wrench, but I do have ears and a screwdriver. I used these baseline settings to dial my wife's bike in perfectly. You can too.