426f question

5 replies to this topic
  • Stinger1133

Posted July 10, 2011 - 07:58 AM


I just bought a 2000 yz426f. I remember seeing on here somewhere a thread for putting the 426f engine in an aluminum frame a long time ago. Does anyone know if this thread still exists ? I have searched everywhere but can not find it. I have my bike stripped down and want to buy an aluminum frame on fleabay. Thanks.

  • grayracer513

Posted July 10, 2011 - 08:18 AM


It's a lot of work, and you'd need to use a wet sump kit for the engine (which I adamantly recommend against doing) or build an external oil tank, just for starters. You can save as much weight by using a frame from an '03-'05 YZ450 and have fewer problems to work out.

  • Stinger1133

Posted July 10, 2011 - 08:21 AM


I didnt know that would work. That sounds good. This is my first 4stroke and got a really good deal on it but it needs work. Engine runs really strong and transmission shifts really smooth. I will look into the 450 frames and see what I can find. Thanks.

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  • QuietFlight

Posted July 10, 2011 - 08:30 AM


but it needs work. Engine runs really strong and transmission shifts really smooth..

how much work could it need?

  • Stinger1133

Posted July 10, 2011 - 08:57 AM


On the bottom of the engine the oil drain plug is cracked and has been jb welded. The rear shock is shot and leaking oil everywhere. The front forks are for a 250lbs rider I think because they are really stiff. the rear wheel spokes are all loose and the wheel wobles. Thats really about it. I am thinking of getting a set of good used cases from ebay and fixing the cracked plug issue. I am going to get the rear shock redone. The front forks I can do here. As for the wheels, I will probably get new ones. I will post some pics of the cracked part of the engine.

  • Stinger1133

Posted July 10, 2011 - 09:12 AM


Here is a pic of the cracked case that has been jb welded.

Posted Image

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