few questions with motor swap

[pyro7478]

i have a 2001 400ex and recently bought a 2005 motor and put it in today but the splines on the sprocket dont line up, if i buy a sprocket for an 05 will the teeth line up with the chain? 2nd question how is reverse engaged, i noticed the little lever on the bottom of the motor but what do i have to do to shift into reverse? thanks in advance.

[bullett]

To shift into you reverse you turn a knob and then push down on the shifter as if you were gearing down. You might wanna look into the knob for the reverse engagement

http://media.photobucket.com/image/400ex%20front%20plastic/mikody/IMG_0190.jpg

to the left of the warning plate black knob

[MtnEX]

I thought once about doing this myself for the reverse.

I just never found an engine or bottom end for a reasonable price.


I bet the reverse engagement just requires that the lever you found be held in one direction as you downshift.


If so, if I were you I swear I would do a little research and figure out if there is any way you can borrow the engagement off of a KFX 450R.

It's the bomb!

http://www.********.com/images07/kfx450rreverse2.jpg

[MtnEX]

Well, that didn't work...

So do a google image search and look until you see a picture of the right handlebar.

Your hands never come off the bars for this.
It has a thumb lever right by the throttle.
Cable operates the reverse lever so you can shift down into reverse.

[guenther]

I'm interested to hear the solution to your question. I'm not trying to hijack your thread but this goes along with it. Do you think $125 is worth it for a 2005 bottom end (just case), transmission and connecting rod? If so, could I take everything else off my 2001 to make it complete?

[MtnEX]

Originally posted by guenther
I'm interested to hear the solution to your question. I'm not trying to hijack your thread but this goes along with it. Do you think $125 is worth it for a 2005 bottom end (just case), transmission and connecting rod? If so, could I take everything else off my 2001 to make it complete?

I know you didn't ask me, but I'll answer with my opinion anyways...

If it is known-good... HECK YES!!!


I was finding them for like over $600 just for the bottom end... sight unseen (ebay).


I'd buy it up... get a bolt-on bore kit (cylinder & pistion) pick up a reworked ported head, and a new set of hot cams. Then I'd put that in and sell the complete 2001 engine. I'm thinking you could almost break even.

If I could have found a bottom for that price I would have just snatched it up, even if I just kept it around until I needed to go into the stocker top end. Then I would have swapped bottoms while the top was off for service.

[pyro7478]

thanks guys. as for the other question though even though the splines on the inside of the sprocket are different (between the 01 and 05 engines) will the teeth on a 05 sprocket fit the chain on my 01 400 (now 440)?

[MtnEX]

I would guess they both use the same 520 o-ring chain... so I would guess yes.

Cross-reference the OEM chain part numbers or check an aftermarket chain.

[00300ex]

I did this swap ... all i had to change out was the starter and sprocket and sprocket retainer ... for the reverse i just got the switch off ebay from a newer 400ex and drilled a hole in my front fender and put it in there ... if you have any ques let me know its been a year or so since i did mine but ill try and help

[riotact]

Why did you have to change out the starter?You would think they would be the same.

[00300ex]

the mounting holes are a little diff

[pyro7478]

ok thanks. i thought the chains would be the same but wanted to be sure. about the starter the new motor has one (luckily).