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Alright guys. I finally pulled the plug and bought a 1981 YZ465. Going to pull everything down and looking to see what all she will need. Just hope this artificial hip will start her up. And she does have a decompression in the cyl head. What do y’all think?
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Looks like an excellent starting point. I may have a few misc. parts laying around for a 465 if you need something.
Posts: 430
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Location: Madison, MS USA
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Tell Aaron I said get up off that Gunnar Gasser throttle assembly John.......lmao
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Looks like a great candidate. Check your frame for cracks or breaks.
I have one that looks similar and the frame has stress cracks at several weld points.
On that note: anyone know if the 81' 250 frame is the same as the 465?
I was G before the "moto drive" to Vital
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Location: Spring, TX USA
beware of the front downtube. Check it very closely for horizontal cracks in the area level to the DG badge on the pipe. I had a crack develop there and had it welded up before it got outta hand.
If there's nothing wrong, keep an eye on the downtube from time to time.
Larry Navarro - Spring,TX. Damm glad to meetcha!
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Nice find of a great bike. 250 frames are the same and looks like a better starting point than the one I picked up! Lol
I'm working on upgrades to the rear shock like real valve piston and a Fox remote reservior with compression adjuster. Should be a lot of fun when done!
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Thanks for the info on the 250 frame. Did you say Fox shock? I need to get a frame for this one.
I was G before the "moto drive" to Vital
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I have an 81 YZ250 frame, I will sell. Do you have any other after market YZ goodies you would sell? Anything for 1980 YZ125?
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Edited Date/Time:
A later model YZ two stroke throttle will work perfectly and I think you get a little more reliability from it. I've run the old whirlpool style throttle and prefer the modern version. The original throttle housing from that year will set you back $150 at least when they come up on Ebay. I am also running a late model clutch perch and lever with the quick adjust. Use OEM cables for clutch and brake if you can find them. There is a difference between OE and aftermarket. find the specs to file the slide from stock 2.5 to 3.0. I lost all that info when my old laptop shit the bed. I think Eric Gorr can cut the head to run pump gas or you could run 100LL Avgas at 32:1 with any decent oil. I use Maxima SuperM. For the swingarm bearings and bushings, OEM is best but $$$$. Triple clamps from a 84 or 85 will put the bars over the fork tubes for a more modern feel. You jsut need to use your 81 steering stem.Uni still has air filters available and the chain rollers are still a dealer item as are the swingarm blocks. The rollers are the same as whats on the Banshee. I found some pegs from a late model YZ/YZF that with a little grinding and drilling the peg mounts work just fine. Mine were ti so I have that trick factor going. There is on Ebay some where a milled bit for the clutch arm that will help soften the clutch pull. Look for a shift drum on Ebay as they are kind of fragile. I split and replace now in 20 minutes once I get the bottom end out of the frame. You can still get a V-force reed block for it. Add that with a PFR pipe and silencer and it will be really crisp. I run a hardened bolt in place of the shock/swingarm clevis pin. The stock one can bend. Do lots of digging on Ebay for small parts. Wiseco pistons are fine, just make sure you have a good machinist to set it up for you.
The older I get, the faster I was.
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I got the frame covered with the confirmation of the 250 swap. Thank you tho.
The 125G is actually my achilles heal. I have too much, nah that's not possible. I do have an nos cone pipe I'll sell you.
I was G before the "moto drive" to Vital
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Now it’s apart. Time to get some parts ordered.
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Looks like you need donor frame. I have parts from a 1981 YZ250. I think some parts swap over.
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I could use the rear fender hoop if anyone has a junk frame but the seat mounts all the way back are good. 
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Getting there. Waiting on the wheels and forks to get done.
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Lol ,of all the bikes you chose to get with an artificial hip you picked a yz465. The only thing worse would have been a 84 CR500
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