Any one got a big bear front diff apart?

[chopperhed]

I know I'm new here but not new to PowerToys. My collection includes a 71 CB750 Chopper, A 78 XS100 bagger, an 81 IT 175 Enduro, a 76 XT500 DP, and a 78 Peterborough boat. My quad experience is limted to the OLs HondaYamaSuki Special. I gave it to her last Christmas. Its a 85 Suzi Quadsport chassis, with a 1980 Honda XR200 motor, and modified Raptor plastics. It features an FMF Turbocore silencer, a Custom built cable side kick starting system, and dragon scale paint. Pics to follow.

More to the point, I have her dads 95 350 bigbear in the shop for some work, and Ive run into an issue in the front diff. Everything I`ve seen says that the front diff carrier bearings are 35x72x17. Unfortunately, the bearing boss on the carrier I have here is only 32mm. There is 3mm of play between the carrier and it supporting bearing. Everything i know from all my experience says this is WRONG.`The carrier and ring gear look to be in decent shape, there is NO obvious wear on the carrier bearing bosses. the bearin gs look to be brand new, but yet I have this problem. The carrier I have here is a limited slip diff, and it fits the CVjoint splines, sorta. I`m kinda lost, so if you have a stock diff on the bench, could you measure the bearing bosses for me.

That would be awesome.

Edited April 24, 2012 by chopperhed
had the bearing size wrong

[oxidized_black]

i have a link for your bike for a service manual if you need one ....

http://www.quadcrazy.com/atvforum/yamaha-atv-forum/11168-yamaha-atv-service-manuals.html

at the bottom of the list it shows you where to go with the passwords ....

[chopperhed]

It comes up as expired.

. I suspect I have an aftermarket or mistaken carrier. There was some previous work done by a sketchy individual. he soaked them for a big buck, he could have swapped in something else.

but....

u never know with a job like this.

[oxidized_black]

the link works fine. if you want to send me your email address, i can send you this file. just pm me here if you like ...

[chopperhed]

I have the official yamahaha service manual, but it doesn't give dimensions for that particular part. All the replacement bearing listings I can find say the bearings and seals are correct. The quad was built january 95. there are no supplements in the manual that covers it. I'll see if a local tech can give me some info tomorrow.

[oxidized_black]

i didn't notice you were in edmonton, i deal with riverside yamaha in st. albert. i bet they can help you out. i sent you the manual too ...

[chopperhed]

I'll be giving all the local hotshots a call.

[chopperhed]

got the email. its the same manual i have