1981 YZ465

MXDAD140
Profile picture for user MXDAD140
Posts
446
Joined
12/4/2007
Location
Madison, MS US
MXDAD140
Edited Date/Time 4/29/2018 9:14am
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?



|
newmann
Profile picture for user newmann
Posts
24444
Joined
4/1/2008
Location
US
newmann 2/8/2018 9:35am
2/8/2018 9:35am
Looks like an excellent starting point. I may have a few misc. parts laying around for a 465 if you need something.
MXDAD140
Profile picture for user MXDAD140
Posts
446
Joined
12/4/2007
Location
Madison, MS US
MXDAD140 2/8/2018 9:38am
2/8/2018 9:38am Edited Date/Time 2/8/2018 9:49am
newmann wrote:
Looks like an excellent starting point. I may have a few misc. parts laying around for a 465 if you need something.
.
MXDAD140
Profile picture for user MXDAD140
Posts
446
Joined
12/4/2007
Location
Madison, MS US
MXDAD140 2/8/2018 9:39am
2/8/2018 9:39am
newmann wrote:
Looks like an excellent starting point. I may have a few misc. parts laying around for a 465 if you need something.
Thanks. I’ll be making me a list soon. It has a 490 bottom end in it.

The Shop

See All »
GIwasB4
Profile picture for user GIwasB4
Posts
2585
Joined
7/24/2008
Location
Beverly Hills, CA US
GIwasB4 2/8/2018 1:12pm
2/8/2018 1:12pm
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?
wfoyz250
Profile picture for user wfoyz250
Posts
410
Joined
1/19/2011
Location
Spring, TX US
wfoyz250 2/8/2018 1:29pm
2/8/2018 1:29pm
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.
450exc115
Profile picture for user 450exc115
Posts
664
Joined
11/6/2014
Location
Hebron, CT US
450exc115 2/8/2018 3:37pm
2/8/2018 3:37pm
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!
GIwasB4
Profile picture for user GIwasB4
Posts
2585
Joined
7/24/2008
Location
Beverly Hills, CA US
GIwasB4 2/8/2018 3:47pm
2/8/2018 3:47pm
450exc115 wrote:
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...
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!
Thanks for the info on the 250 frame. Did you say Fox shock? I need to get a frame for this one.


wfoskir
Profile picture for user wfoskir
Posts
181
Joined
6/11/2017
Location
Half Moon Bay, CA US
wfoskir 2/8/2018 9:03pm
2/8/2018 9:03pm
450exc115 wrote:
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...
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!
GIwasB4 wrote:
Thanks for the info on the 250 frame. Did you say Fox shock? I need to get a frame for this one. [img]https://p.vitalmx.com/photos/forums/2018/02/08/242763/s1200_ftc.jpg[/img]
Thanks for the info on the 250 frame. Did you say Fox shock? I need to get a frame for this one.


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?
AHRMA361
Profile picture for user AHRMA361
Posts
2468
Joined
4/1/2008
Location
NE, OH US
Fantasy
232nd
AHRMA361 2/9/2018 3:09pm
2/9/2018 3:09pm
450exc115 wrote:
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...
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!
Race Tech did my 1981 YZ250 shock. Different valving, dual rate Eibach springs. Awesome workmanship and works beautifully.



captmoto
Profile picture for user captmoto
Posts
5139
Joined
4/22/2009
Location
Rancho Cucamonga, CA US
captmoto 2/10/2018 2:55pm
2/10/2018 2:55pm Edited Date/Time 2/10/2018 3:16pm
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.
GIwasB4
Profile picture for user GIwasB4
Posts
2585
Joined
7/24/2008
Location
Beverly Hills, CA US
GIwasB4 2/11/2018 9:18am
2/11/2018 9:18am
wfoskir wrote:
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?
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.






MXDAD140
Profile picture for user MXDAD140
Posts
446
Joined
12/4/2007
Location
Madison, MS US
MXDAD140 2/11/2018 2:59pm
2/11/2018 2:59pm
Now it’s apart. Time to get some parts ordered.











wfoskir
Profile picture for user wfoskir
Posts
181
Joined
6/11/2017
Location
Half Moon Bay, CA US
wfoskir 2/12/2018 7:00am
2/12/2018 7:00am
Looks like you need donor frame. I have parts from a 1981 YZ250. I think some parts swap over.
450exc115
Profile picture for user 450exc115
Posts
664
Joined
11/6/2014
Location
Hebron, CT US
450exc115 2/12/2018 8:30am
2/12/2018 8:30am
I could use the rear fender hoop if anyone has a junk frame but the seat mounts all the way back are good. Smile
MXDAD140
Profile picture for user MXDAD140
Posts
446
Joined
12/4/2007
Location
Madison, MS US
MXDAD140 4/25/2018 12:47pm
4/25/2018 12:47pm
Getting there. Waiting on the wheels and forks to get done.
MaxPower
Profile picture for user MaxPower
Posts
2646
Joined
8/15/2006
Location
NJ US
MaxPower 4/25/2018 1:15pm
4/25/2018 1:15pm
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
MXDAD140
Profile picture for user MXDAD140
Posts
446
Joined
12/4/2007
Location
Madison, MS US
MXDAD140 4/25/2018 1:53pm
4/25/2018 1:53pm
MaxPower wrote:
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...
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
Just had to have it. lol

Pit Row

See All »
wfopete
Profile picture for user wfopete
Posts
356
Joined
7/27/2015
Location
Dover, AR US
wfopete 4/29/2018 7:43am
4/29/2018 7:43am
MXDAD140 wrote:
Getting there. Waiting on the wheels and forks to get done.[img]https://p.vitalmx.com/photos/forums/2018/04/25/257585/s1200_13E47F31_3686_4E46_9E90_F3798868B8DA.jpg[/img]
Getting there. Waiting on the wheels and forks to get done.
While you are waiting on your wheels; clean up your #*^!&$ garage!
Achahoish 4/29/2018 9:14am
4/29/2018 9:14am
MXDAD140 wrote:
Now it’s apart. Time to get some parts ordered.[img]https://p.vitalmx.com/photos/forums/2018/02/11/243450/s1200_C3678600_6BD1_4BE4_A48D_94F3A4DCFD5A.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2018/02/11/243451/s1200_33C0CC1D_4886_476B_ABED_F57E31F2144C.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2018/02/11/243452/s1200_B844B295_5576_44EF_93B3_37D590AB805F.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2018/02/11/243453/s1200_E7CE0516_66A8_4CEF_8B0C_F7A3414E5F6E.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2018/02/11/243455/s1200_98E2CADF_9B0F_451C_8BE3_CC98CEDE30D9.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2018/02/11/243457/s1200_C681943E_7979_410F_9BCA_12DC092FE9F3.jpg[/img]
Now it’s apart. Time to get some parts ordered.











Seriously dude; get some parts trays, or steal a couple of the wife's roasting trays. You are going to ,lose nuts & washers & bits.
Or you will drop down onto your kness & kneel on one of those little SOBs

Post a reply to: 1981 YZ465