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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Splitting cases?
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[QUOTE="jmics19067, post: 312871, member: 27963"] use heat. warm up the area around the bearing with a propane torch. if you can guestimate about 350degrees farenhiet. if you can the eaisest quickest way to change the bearings is to put the new bearings in a freezer. remove the dowels and bearing retainers of the bearings you want to change. clean the cases extremely well finishing up with soap and water. Blow dry with an air compressor. Heat the cases up <luckily I know someone who used to own an old Bultaco dealership and he has an oven in his shop for specific reason> to about 350 using welding gloves or oven mitts hold the case 8 10 inches away from a hard peice of wood and smack it flat against the wood . Most of the time they pop right out . If the area behind the bearing is clean then you can just drop the new bearings in while the case is still warm. Install your dowels and bearing retainers using blue loctite on the screws. if you have everything ready, the crank and transmission all clean and set to go in, poor a little gear oil on the gears , shafts and bearings and then a little 2 stroke oil on the crank bearings .lay the right side case on 2 4x4 one under the front engine mount and one under the rear engine swingarm pivot .<if this is the case with kawasakisnot sure > put your trans and your crank in the right case . smear you sealer on stingily but making sure you cover all that needs to be sealed or line up your gasket. now just line up the left case on top . if the cases are still warm it should go right together with maybe a slight help from a rubber mallet. Install your case screws and torque. Spin the crank to make sure it rotates freely and install you shift shaft and lever and go thru the gears to make sure they are alright Watching this being down by someone who has done it often is shear poetry in my eyes. talking 15/20 minutes from when the cases are out of the oven till youhave a complete bottom end ready to have its clutch and all put back in . The only key being organized before you start. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Splitting cases?
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