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View Full Version : 2000 440ex Big bore kit



BAMF007
03-29-2008, 11:01 PM
Hey everyone,
I recently purchased a 2000 400ex with the big bore kit and the edelbrock carb on it. I have a 16 tooth front sprocket and a 36 tooth rear. The bike gets up and move very quickly but it seems to hit rev limiter very quickly. Idk what it could be. Please give me your help.

I dont know what else to tell you. If I race it against my 05 raptor 660 it beats it off the line and out of coners no problem but when the motor has to make power up top it basically hits fuel cut. Once you shift it pulls alil then fuel cut again. It doesn't sound like it is going all the way through the rpm band. Let me know what you think could be wrong.

mad440
03-31-2008, 12:51 PM
i ran into this when i was tuning my 440, my problem turned out to be not enough air, try taking you air box lid off just as a test to see if it will rev all the way out, i have a different carb than you do so i cant tell you exactly how to tune the edlebrock but i do know you have a carb tuneing issue not a gearing issue