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My YFZ Pics and a few questions
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Posted by: stjoetalon

I just got a 04 YFZ with a YZ426F swapped in.

First off, what are the pros and cons for going this route? I was kind of turned off by the swap at first but it looks good and runs really well.

Second, The bike has nothing electrical. I am wanting to go back to having lights. What would I need to purchase and/or is it even possible with this engine swap?

Third, The bike runs great. But it will not Idle at all. Where should I start to figure this out? I know nothing about carbs besides the basic principles of carburation. But I like to think I am pretty mechanically inclined. Just need some pointers

Finally, it seems like the bike runs out of gear. What size are the stock sprockets? I just want to get a starting point. Think Im going to drop 2 teeth in the back. It has a 40t on t now. I have a set of 18's on back.
http://i79.photobucket.com/albums/j121/stjoetalon/b18f47e2.jpg
http://i79.photobucket.com/albums/j121/stjoetalon/be0f9b0f.jpg
http://i79.photobucket.com/albums/j121/stjoetalon/d1fc2096.jpg
http://i79.photobucket.com/albums/j121/stjoetalon/581f03bc.jpg
http://i79.photobucket.com/albums/j121/stjoetalon/DSC00439.jpg
http://i79.photobucket.com/albums/j121/stjoetalon/DSC00440.jpg
http://i79.photobucket.com/albums/j121/stjoetalon/DSC00441.jpg
http://i79.photobucket.com/albums/j121/stjoetalon/DSC00442.jpg
http://i79.photobucket.com/albums/j121/stjoetalon/DSC00433.jpg

Here is some pics of the 440EX "progress"
http://i79.photobucket.com/albums/j121/stjoetalon/DSC00427.jpg
http://i79.photobucket.com/albums/j121/stjoetalon/DSC00428.jpg

Posted by: Mojo250

looks good, but sounds like the motor got throw in their half *** if it aint rnning right.

sounds like you may need to mess with the air and fuel screws on the carb to work on that idle. if that isn;t it, check the plug, or clean out your carb.
as for electrical, if there are no wires at all, and they were taken off, get yourself either a wiring harness from a stealership, or run it ghetto and hook them up to the switch and battery with home depot wire.
lastly, i dont know what the stock gearing is, easy to find. if it is running out of gear with that motor, than definatly change the sprockets!

Posted by: stjoetalon

Well, someone on Bluetraxx said it might be the TORS system. I just went out and looked at the bike and there arent any wires going to the throttle. So I amthinking that the guy that did the swap deleted the TORS and that might be my problem. I dont want to mess with the carb too much. It runs flawlessly everywhere but idle.

Posted by: EvilEwok

I'm confused on why someone would do this swap...?

Posted by: stjoetalon

Me too. But it sure does run good. NO Problem out running stockish 450's on the straights.

Posted by: EvilEwok

Lol, that's all that matters then. I'm still wanting to drop in a ktm engine in one of the new chassis

450 or 525.

Posted by: tar

I bet he blew up the 450 motor so he came by a good deal on this 426 motor so he put it in

Posted by: Mean250r

http://img96.imageshack.us/img96/4290/awesome6lg.jpg

Posted by: stjoetalon

You have been dying to use that havent you!

Yeah, he probably blew it up.

So...does anyone know where I can get more info on the TORS?

Posted by: Mean250r

quote:
Originally posted by stjoetalon
You have been dying to use that havent you!

Yeah, he probably blew it up.

So...does anyone know where I can get more info on the TORS?

ha ha ha ha yeah actually i was lmao

your bike is pimp, i bet he blew up the stock motor as well