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1989 Yamaha Big Bear

Hey everyone,
I recently purchased a 1989 Yamaha Big Bear for a good price, however it needs some things.  I was wondering if anyone knew what years of the Big Bear or other makes/models that would have parts that would be interchangeable with mine.
Thanks in advance,
M

Re: 1989 Yamaha Big Bear

Reply #1
Welcome to TQC!  

Take a picture of the monster, we love pics.

Interchangability depends on the parts you need.  Most of the engine parts will swap out from 89-99 to 2001 (depending on what it is) with the warrior/raptor 350 and big bear. 
Click on the pic VVVV You know you want to....


Re: 1989 Yamaha Big Bear

Reply #2
At the moment I am looking for a seat.  I have a guy with a '93 seat who seems to think it will fit my '89 but I cant find a difinitive answer anywhere if it will fit mine.

Re: 1989 Yamaha Big Bear

Reply #3
Ok, the factory part number shows that seat fits on 89-92 BUT that can be something as simple as they changed seat cover color so they changed the part number.

If you can check out the seat in person (or even with REALLY good pics) you should be able to determine if it will fit.
Click on the pic VVVV You know you want to....


Re: 1989 Yamaha Big Bear

Reply #4
Ive only seen 2 numbers change in the part number between 89 and 95.  And based on the description that looks to be the color.  There seems to be a completely different seat assembly that can be used past 93 as well.

Thanks for pointing that out, I dont think I would have caught that before.

I appreciate all the help,
M

Re: 1989 Yamaha Big Bear

Reply #5
New question!

After wrestling with it for a few hours I finally was able to get the rear swingarm off.  There was alot of crap in there around the U bolts and on the driveshaf that I scrapped out.  My question is how clean should I actually get it and whats the easiest way to clean it?  Like can I use a hose and spray some water in there or should I just stick to scraping and wiping? Should I get it as shiney as I can or what?

The picture is where I found all the crap after I scraped a bunch of it out.

The old boot that was over this was split (I did get a new one).  I assume the previous owner rode it anyway which is why there was so much junk in there.

Thanks in advance,
M

Re: 1989 Yamaha Big Bear

Reply #6
Pretty much every swingarm I've ever taken off has some of that in it.  Even if the boot isn't split, the vent or lower seal lets it in eventually.

Usually I'll spray them out with purple power to remove most of the dirt/mud and then dunk them into the parts washer for a good deep clean. 

Do yourself a favor and very gently press the u-joint out so you can get some grease in there before it flies apart later.  Ounce of prevention is worth a pound of cure.
Click on the pic VVVV You know you want to....


Re: 1989 Yamaha Big Bear

Reply #7
I presume I should put some grease back into the swing arm down where the u bolts plug into the rear axel correct?  The junk that was in there was like grease/dirt/grossness mix so I scrapped it out.

Re: 1989 Yamaha Big Bear

Reply #8
The u-bolt or u-joint?

I coat all splines liberally with EP grease (pump grease but not the cheapy wheel bearing grease that has clay in it, if you can see through it, it's most likely EP) during reassembly but leave the bulk of the swingarm tube clean and dry.  It simply won't stay that way, but you aren't supposed to have anything in there....
Click on the pic VVVV You know you want to....


Re: 1989 Yamaha Big Bear

Reply #9
Alright cool, thats pretty much what I did.

Now I am trying to figure out if a 1999 Big Bear seat will fit my 1989.  the 3HR-24710 part is the same but the next 2 numbers are different.  All I can see based on the description is the seat color is different.  But the seller cannot find the part number.  So Im not sure if I should even toss in a bid...

Re: 1989 Yamaha Big Bear

Reply #10
I simply cannot tell you if that 99 seat will fit on the 89.  My thought is if you can get it super cheap enough, you can throw a *chance* at it.
Click on the pic VVVV You know you want to....