Sprocket Question 73 WR250

I have a 1973 WR250. I'm looking for a 60 (or close) tooth rear sprocket. A gentleman at Unadilla was looking over my bike and thought my hubs weren't from a 73.
Does anyone here know what other years are the same as my 73? I don't want to have a sprocket made up for a 73, only to find out it won't work. I went through the micro fiche files, but my computer is so old it takes forever to download, and at times just quits and won't download them at all.
Maybe someone here has a 60 tooth they would part with. Is there a way I can measure the hub or the sprocket on the bike now to see what year it came from or to determine that it is, in fact, a 73 hub?
Thanks for any help you folks can provide.

Stick a photo up and some one will tell you within minutes what you need to know!

wow, thats a big sprocket

Here's a picture of the sprocket and hub. Sprocket has a 7" ID hole. The distance between centers on the bolt holes going around it are 3-3/4"+. The distance between centers of the holes directly across from each other is 7-9/16".
This bike now has a CR transmission in it and is great for MX. I want to race some tight New England Hare Scrambles, and would rather deal with the rear sprocket than fight with the tapered countershaft sprocket. (In other words, I can't get it off. And it's only been on there since June.)
Was hoping someone here would have a larger sprocket than this 53 tooth I have now.

The hub pictured is the correct one for your year. In fact that exact hub was used by Husky for about ten years until they went to a wider brake shoe, but the sprocket mounting dimension remained well into the 80's.

Next time you install a tapered shaft sprocket apply one small drop of thread lock to the tapered shaft just before sliding the sprocket on. This will enable the sprocket to pop off with a puller the next time.

Thanks Crash. I actually put a dab of never seize on it before tightening. I have a 10 tooth counter I wanted to try, but just can't get the other one off. Hence the need for a new or used rear sprocket. Was hoping to have it for a race this weekend.

Put your puller on, apply a fair bit of pressure then heat sprocket with a fine flame torch so the heat is mostly hitting the sprocket, I use my oxy acetylene gear or a plumbers torch. I have used bits of scrap metal behind the sprocket to protect cases and seal from the naked flane.

Here are a couple sources for rear sprockets. Stuff is pretty easy to find via Google.

http://hva-factory.com/wheels-brakes/husqvarna-rear-sprocket-sprockets-48-57-teeth

http://www.husqvarna-parts.com/catalog/item/6417224/6551911.htm

http://www.rebelgears.com/vintagesprockets.html

Hi Gord, I'll have to look at my 75 wr. My 78 is 11 and 53. My 73 had a 10 and Stahls had to cut my sprocket off. They put a splined shaft in it.

disonny, after the spline shaft went in your 73 did you then have a 6 speed? The reason I ask is because to my knowledge the only spline shaft for a 73 motor would have been the 6 speed trans out of the 74 250 or 400.

Gord...my sense is an 11 / 56 combination will be a very good set-up for you.
Don't fret pulling what you have now...the Husky puller works very well.
Make sure both jaws are pulling on multiple teeth if at all possible.
Put wrench pressure on the bolt...a gentle bit of propane torch heat on the body of the sprocket.
Another quick turn of the wrench and POP..it's off.
Some like to put wrench pressure on the bolt...then a sharp rap with a hammer (NOT a sledge!!!) on the end of the bolt and POP!

And there are many opinions regarding what to coat the taper with before assembly.
For over 40 years I've used...nothing. Squeaky clean and dry. 50 ft lbs. Re-torque after a first ride.

Also...I'll gladly trade you a new 11 for your 10...or anyone else reading this post. Or purchase it...
My little 125 WR needs all the gearing help it can get...and only one rear sprocket (53 dished) was ever made for the early 125's.
I need a 10.

Thanks folks for all the replies. I ended up having PBI make up a sprocket for me.
Those are good sources for most Husky parts Crash. But none of those or others have what I needed.
Richard, I might be interested in trading my 10 for your 11. Mine is new and has never been on a bike.

Crash, it is a 5 speed tranny in my 73. I couldn't tell you what shaft they used. They told me they cut the taper sprocket off because it wouldn't pull off.

Gord...I sent you a direct message on this...let me know...thanks!