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nextasex

Jan 31 2005, 07:36 PM

How many teeth on a 2004 400EX front sprocket, and the same question for a 2005 400EX...? I will be going down a tooth on 4 of these quads, the kids want more power to go up olds

Thanks,
Frank

SandSlinger

Jan 31 2005, 08:04 PM

Stock on a 400ex is 15t.

SS

Ifly

Jan 31 2005, 08:08 PM

I went down 1 tooth and it helped out alot

Kevin

Jan 31 2005, 08:10 PM

stock on the 400 is 14 i beleive

nextasex

Jan 31 2005, 10:09 PM

Darn it, I knew I was going to get conflicting answers

So is it 15 or 14. I don't have the quad right here with me or else I would just go out and count for myself.

Help?

RodSmith32

Feb 1 2005, 06:11 AM

my '01 is a 15 tooth

Rusty

Feb 1 2005, 07:26 AM

According to ServiceHonda.com, front sprocket (23801-HN1-000) is 15 tooth. Looked in the service manual, but no real good picture.

Brotron

Feb 1 2005, 12:05 PM

I have 2003 and a 2004 400 ex and the front sproket on both of them as they came from the factory is a 15 tooth.

Mike_socal

Feb 1 2005, 03:09 PM

I'm pretty sure the 05 counter shaft sprocket is a 14 tooth. From what I hear, the counter shaft spline count is also different for the 05. The 04 is a 15 tooth.

nextasex

Feb 1 2005, 03:14 PM

Thanks guys!

Frank

desertbound

Feb 1 2005, 05:02 PM

Up to an 04 400ex has a 15 tooth. The 05's have 14 tooth sprockets. And yes, the splines are different as well.

nextasex

Feb 1 2005, 05:36 PM

QUOTE (desertbound @ Feb 1 2005, 05:02 PM)

Up to an 04 400ex has a 15 tooth. The 05's have 14 tooth sprockets. And yes, the splines are different as well.

Does this mean the 2005 gearbox has different gear ratios than the 2004's?

Thanks,
Frank

dunetrip

Feb 3 2005, 02:01 PM

2003 has 15. I just went to the 14.

desertbound

Feb 3 2005, 05:14 PM

QUOTE (nextasex @ Feb 1 2005, 05:36 PM)

QUOTE (desertbound @ Feb 1 2005, 05:02 PM)

Up to an 04 400ex has a 15 tooth. The 05's have 14 tooth sprockets. And yes, the splines are different as well.

Does this mean the 2005 gearbox has different gear ratios than the 2004's?

Thanks,
Frank

Yes. They added reverse, and the gear box is a little taller than the 04 and below. SO they went with the smaller sprocket to counter the taller gears. My wifes 05 400ex will pull my fat butt around no problem. It is completely stock. It will keep up with my brothers 04, and I have built his motor and regeared his.

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