440ex motor help

[440ex power]

I have a 440ex with 11:1 comp. stage two hot cam new CDI and am running a 16 to 36 gear ratio and can't seem to get it to do more than 68 mph and my buddy with a 416ex and he is running 15 to 36 ratio and is beating me on top end please help!!!!!!!!

[PismoLocal]

what size tires are you running and what type of motor work does he have done?

[enduro400rider]

what size tires are you guys running? my 440 with a 16/36 was clocked in the mid to high 70s but that was with a carb, pipe, cam, ported and polished head ect. i was running 20s. the 416 can rev faster being its a lighter smaller piston. you might want to check your jetting, do you have a pipe? have you re-jetted it since you bored it out? bigger piston needs more gas, first thing you should check out is your jetting. next how big are you? im a pretty light kid about 145lbs. put me on a stock 400 next to a 300lb dude on an identical quad id kill him in every drag, so weight can make a differance.

[440ex power]

i am about 210 pounds and he is about 155 we both have the same tires but all he has done to the motor is a 416 piston do you have any ideas on what will make it faster. I am runninng a 190 main jet in it right now. please send suggestions. ps: i also have a white brothers R4 exhaust on it.

[PismoLocal]

get him to wear a backpack that has 55lbs of bricks in it and i bet you'll smoke him.

[440ex power]

ok i 'll try to talk him in to that ha ha ha!!!! thanks for all your help.

[sixer3]

try running different gearing?....is he maxing out at a higher top speed or just getting to his top speed quicker?

[enduro400rider]

are you running out your gearing? is it hitting the rev limiter in 5th. if it is you should be out running him in top speed. like i was saying with my 440 and that gearing i was in the high 70s. but then when my buddy hopped on it and i was riding double it would never reach the rev limiter because of the extra weight. kick the front sproket down a tooth for a little more torque.

[enduro400rider]

one more thing, i cant help you on jetting because i was running an edlebrock carb on my 440 and it didnt have jets. you might want to look into getting an edlebrock carb for your 400 i loved mine, it gave good power and it was really easy to work with. all you had to do is twist a screw one way to make it richer then the other way to lean it out. i broke a screw off inside and basically ruined the carb. i called up edlebrock they told me to send it in and they sent me a new as soon as they got it, for free. they didnt evem charge me shipping. alot of people will say the FCR carb is better which it may be, i have never riden it. but the customer support at edlebrock is awsome so i would personally go with edlebrock.