Worth buying?

I found a 06 yz450f with a siezed motor. I can pick it up for $900. I went and looked at it and when I pulled the oil filler plug I found it to be out of oil. Obviously I can't say how bad the damage is but it is a otherwise clean bike. The guy said he had just had the clutch and gearbox done at a shop. He said it's not worth him fixing because he would have to have a shop do it. I on the other hand can rebuilds the entire engine myself. What is the best and worst case scenario and is it worth the risk?

I'd make 110% sure that he did take it to a shop. If he didn't, he may have attempted the work himself and messed up something in his possible lack of experience.

I'd make 110% sure that he did take it to a shop. If he didn't, he may have attempted the work himself and messed up something in his possible lack of experience.

yah I thought about that. I'm fairly confident he took it to the shop. I didn't see any tools in the garage and the guy seemed like he had never worked on a bike in his life. Hints the lack of oil and seized motor.

If it was ran out of oil, I'd look at it as pretty much a rolling chassis. I'd give 'em maybe 500 bucks.

you have to run these bikes a short time to find oil on the dipstick if it was sitting a long time other wise it drains into the crank case,so it may not be out of oil at all.

You can buy a clean, running '06 for $2500 pretty easily, whereas with the one you found, you could end up spending $2500 on the parts and necessary sublet services (like valve seat refinishing).  On the other hand, you could also buy one running and end up rebuilding it in under a year.

running and clean '06s are going for under 2000 here in central Virginia ....

I agree, it's not worth much more than $500. I just sold a clean 06 for $2200. If it ran out of oil then it likely has a damaged head, camshafts, cylinder, piston, and possibly crankshaft. Right off the bat that is $1500 just in parts before you even add the labor.

Crank: $400

Cylinder: $300

Piston: $100

Rings, pin, clips: $35

Head: $800 (or $400 if repairable)

Valves: $400

Seals and gaskets: $125

Mains and other bearings: $250

Sublet valve seat work: $250

Timing chain, oil pump, etc.: $150

 

Do the math. 

 

That ignores whether it needs wheel bearings, swing arm bearings, steering head bearings, rims, tires, cables, plastics, chain and sprockets, plastics, etc.

Crank: $400

Cylinder: $300

Piston: $100

Rings, pin, clips: $35

Head: $800 (or $400 if repairable)

Valves: $400

Seals and gaskets: $125

Mains and other bearings: $250

Sublet valve seat work: $250

Timing chain, oil pump, etc.: $150

Do the math.

That ignores whether it needs wheel bearings, swing arm bearings, steering head bearings, rims, tires, cables, plastics, chain and sprockets, plastics, etc.

I get your point but your using high end numbers. I can get a whole motor for half of the cost of your list. I was educated on the oiling system and I am now unsure if it was actually out of oil. From what I have gathered, it is likely a dropped valve or a seized bearing. A dropped valve sounds like it is basically a new head, valves, cams, and all other parts in the head. Also acylinder and piston kit. Is that about right?

Edited by grayracer513

Granted it won't be a new motor, but a running one

I learned the hard way, a dropped valve means a new crank no matter how good the crank seems. Otherwise you may be putting another $1000 into it after about 2 hours of run time.

 

Even if you don't go with high end OEM parts, aftermarket parts still add up:

 

Cylinder works standard bore piston/cylinder kit: $560

Hot Rods crankshaft: $329

Hot Rods main bearings: $65

Used head off ebay: $450

Cam chain: $25

Miscellaneous gaskets: $50

 

That adds up to $1500 right there, and that is just the major components and no labor. Any used running engine on ebay is going to cost you $1300-up and you won't really know what you are getting.

Just saying not to go into the project without an awareness of the potential cost as compared to buying a running bike, that's all.  The numbers are all for new parts, but they're pretty realistic.

Just saying not to go into the project without an awareness of the potential cost as compared to buying a running bike, that's all. The numbers are all for new parts, but they're pretty realistic.

i hear you. I will be doing all the work myself with a little help. I'm just weighing the risk. I could pay a couple grand for a running bike and end up having to rebuild it before long anyways. Just trying to decide if I want to get this one, spend a little more and know I have a sound motor

From what I could tell the rest of the bike is sound. No leaking forks. Good rims. Frame is clean and strait it's basically perfect minus the motor

If are planning on keeping it yourself and don't mind spending the time to fix it, then try to get it for $700 or so and then go through it. Then you will be in it for slightly more than a running bike (plus your labor) and you will know everything is new. I do this quite often with my personal bikes. My 2010 YZ450F was like this. At the time everyone wanted $5000 for their 2010 YZ450F's, and I got mine for $2500, then put another $2500 into it. In the end I paid the same as buying a used one, but I knew everything was new and was setup for me. I had a lot of hours into it, so I didn't really save much, but I'm ok with that.

 

If you are looking to get this bike and be money ahead then don't bother unless you are going to get it cheap and part it out.

So I decided to buy it. What's the best online parts dealer these days?

As far as price

I've been buying OEM Yamaha parts from Honda East Toledo lately. They are typically the cheapest I have seen, and they have free shipping over $100.

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