Crank bearing install *need directions*

**Twilight** · 02-19-2009, 12:48 AM

Looking for instructions on how to install crank bearings and seals on a 85/86 250r WITHOUT splitting the cases.

Please?

**Billy Golightly** · 02-19-2009, 01:12 AM

for all intents and purposes, impossible to main bearings without splitting the cases. Seals you can do, but bearings, its gonna have to come apart.

**Twilight** · 02-19-2009, 03:47 AM

yet in my other thread atleast 2 people said its possible... where are they now?

**2quicktecate** · 02-19-2009, 03:58 AM

bearings impossible. i have to do mine too. or i want to atleast.

**Twilight** · 02-19-2009, 04:01 AM

have the tools to do it? haha i sure dont.

My left bearing is tight, not sure about right yet. I wonder if just doing the seals would correct the smoking problem...

**2quicktecate** · 02-19-2009, 04:06 AM

yeah i have to borrow them. i took my motor apart to look for the rattle noise. my crank bearings are tight but sound rough to me.

**Twilight** · 02-19-2009, 04:28 AM

wanna make a play date, LOL...god i need sleep

**maggiesboy** · 02-19-2009, 04:43 AM

Originally Posted by Twilight

wanna make a play date, LOL...god i need sleep

sleep.... what is that? ... oh, the stuff my wife gets, thats right

I have never heard of crank bearings coming out without splitting cases...seals yes, bearings no.

you two missed a great ride at Walker Valley on Sunday

**Twilight** · 02-19-2009, 09:26 PM

okay if my bearings are tight, i should just install new seals right?

im not splitting the cases, i'll sell it before that

**2quicktecate** · 02-19-2009, 09:42 PM

splitting the cases isn't too bad...

**Twilight** · 02-19-2009, 09:50 PM

do you need the tool to split the cases? or no?

i mean... my bearings are tight and have no wobble. wouldnt new seals be enough if its the crankcase oil?

**Billy Golightly** · 02-19-2009, 10:06 PM

Its better to do it with a tool but it can be done with out it. The 85/86 250R have some nice places casted into the cases that allow you to use screw drivers to break the seal WITHOUT getting into the seal surface. Look at the back motor mount, theres this little tab like thing you can put a piece in and pry against, and also another one behind where the kicker shaft rides thats more or less right underneath where the carb would normally sit.

Putting new seals in without splitting the cases isn't hard. getting the old ones out without scaring up the surface is a bit tricky though...

**MTS** · 02-20-2009, 12:05 AM

=
Putting new seals in without splitting the cases isn't hard. getting the old ones out without scaring up the surface is a bit tricky though...

Slide

with a deck screw works good, fer gettin em out

**Twilight** · 02-20-2009, 02:31 PM

Originally Posted by MTS

Slide

with a deck screw works good, fer gettin em out

care to explain?

**Dirtcrasher** · 02-20-2009, 04:46 PM

Why not pull the top end off and ship the lower end off to someone who isn't afraid to do the work for you..........

Honestly, you'll be lucky to get the seals in there correctly. It isn't hard, but it isn't easy either.

Maybe it's a money thing for you, but no one's gonna tell me that motor won't benefit from new crank bearings.

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