Coming Soon
Home > Forum


Author Topic: Splitting the cases - DIY?  (Read 1404 times)

0 Members and 1 Guest are viewing this topic.

Offline 2STROKEREVOLUTION

  • Novice
  • *
  • Posts: 8
    • View Profile
Splitting the cases - DIY?
« on: October 12, 2012, 12:43:33 AM »
I would like to get my crank rebuild and balanced on my KTM 380SX. While in their I have another thing to fix.

How difficult is it splitting the cases? Is this something I should try at home or take the bottom end to a shop? I have done multiple top ends but never the bottom. How hard is it to put back together?

Anyone with experience please help. Is it more worth it to save the $ and do it myself or save the hassle and spend the $?
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline SachsGS

  • Professional
  • *****
  • Posts: 1235
    • View Profile
Splitting the cases - DIY?
« Reply #1 on: October 12, 2012, 03:07:58 AM »
It isn't difficult to split cases. Read up on technique, take your time and it won't be a problem.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline TMKIWI

  • Professional
  • *****
  • Posts: 1634
    • View Profile
Splitting the cases - DIY?
« Reply #2 on: October 12, 2012, 03:57:04 AM »
It isn't difficult to split cases. Read up on technique, take your time and it won't be a problem.

X2.

It is a good skill to learn.
Part of the benefit of owning a 2 stroke. To do it yourself.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
If you don't fall off you are not going hard enough

Offline citabjockey

  • Expert
  • ****
  • Posts: 145
    • View Profile
    • Yamaha Vintage Enduros
Splitting the cases - DIY?
« Reply #3 on: October 12, 2012, 06:05:54 AM »
Proper tools make the job much less heartstopping. Case splitter, H bars, crank puller, make the job go smoothly. That and a good service manual.

« Last Edit: December 31, 1969, 04:00:00 PM by ' »
Yamaha CT3, RT3, MX125, SC500, Toy Prius, Diesel F250 (it all balances out)

Offline dogger315

  • Expert
  • ****
  • Posts: 113
    • View Profile
Splitting the cases - DIY?
« Reply #4 on: October 13, 2012, 12:02:44 AM »
Quote
Is this something I should try at home or take the bottom end to a shop?
If you are confident in your wrenching skills, you owe it to yourself to give it a try.
Make sure you have a proper service manual (one from the manufacturer is the best),
case splitting tool, flywheel puller and a gasket set.

I've done several post on various forums detailing the process with lot's of pictures.
Here is a link to one that shows the process on a Honda CR500 engine:
http://www.allthingsmoto.com/forums/f-235/cr500-engine-build-pictorial-part-1-a-50432/

You can get a very good deal on the case splitter and flywheel puller from Rocky Mountain
Cycle under their Tusk brand.  These are good quality tools that won't cost a small fortune
like some of the "name" brands out there.

Once you've done it, you'll see it's not hard.  Also, that new ability will give you a better
understanding of how your engine works as well as save you money down the road.

dogger
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline 2STROKEREVOLUTION

  • Novice
  • *
  • Posts: 8
    • View Profile
Splitting the cases - DIY?
« Reply #5 on: October 13, 2012, 02:34:14 AM »
Thanks for the help guys! I'll read through that CR500 thread and check into the tools. It would be nicer to be able to do it at home. There are some things I want to do when in there that no one shop does all of. Save some money for those special mods! And with it apart I can match the cases!

Anything special to put it back together? I guess I just have to read that other thread.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline 2STROKEREVOLUTION

  • Novice
  • *
  • Posts: 8
    • View Profile
Splitting the cases - DIY?
« Reply #6 on: October 14, 2012, 12:48:04 AM »
Quote
Is this something I should try at home or take the bottom end to a shop?
If you are confident in your wrenching skills, you owe it to yourself to give it a try.
Make sure you have a proper service manual (one from the manufacturer is the best),
case splitting tool, flywheel puller and a gasket set.

I've done several post on various forums detailing the process with lot's of pictures.
Here is a link to one that shows the process on a Honda CR500 engine:
http://www.allthingsmoto.com/forums/f-235/cr500-engine-build-pictorial-part-1-a-50432/

You can get a very good deal on the case splitter and flywheel puller from Rocky Mountain
Cycle under their Tusk brand.  These are good quality tools that won't cost a small fortune
like some of the "name" brands out there.

Once you've done it, you'll see it's not hard.  Also, that new ability will give you a better
understanding of how your engine works as well as save you money down the road.

dogger

This is certainly looking like something I can do. I will be attempting it in the future.

Have you ever matched the cylinder to crank ports? I figured taking it apart would allow me to do that myself. Doesn't sound hard and at least a small benefit.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline eprovenzano

  • Professional
  • *****
  • Posts: 617
    • View Profile
Splitting the cases - DIY?
« Reply #7 on: October 16, 2012, 02:26:56 PM »
Do you have a manual.  I found a free one online that I downloaded,  If you need a copy send me a PM with your email address and I will email it to you.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
Eric Provenzano
2019 KTM 300 XCW TPI
2000 KTM 300 EXC (Son's)
2001 KTM 380 EXC
Sold 1991 KDX 200... fun play bike
Sold 1999 KX250
Sold 1999 YZ125 (son's)
Sold 2001 Yamaha TTL 125 (son's 1st bike)
Sold but never forgotten 1974 Honda Elsinore CR250M
Sold 1974 Honda Elsinore CR125