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DIO 50 Crank Bearing Removal

This is how I take the dreaded crank bearing off the pressed crankshaft


 


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DIO Piston Install TIPS
These are some tips on installing or taking off your two stroke pistons from the crankshaft. Always keep the parts clean and take your time and do the job right. Remember that the piston always goes on with the arrow on the piston crown, pointed towards the Exhaust port. Put your rings back on or take them off with a piston ring expander. Rings are very brittle and can snap in half, very easily. Line the rings up with the single ring pin in each slot. Oil the rings and cylinder walls with two stroker oil and carefully lower the cylinder onto the piston. Use a new base gasket , scraping off the old one. When changing or working with the cylinder off, stuff the crankcase around the crank rod to stop foreign debris from entering and fallin in the crank well. Use a new head gasket every time and torque the head bolts in a cross-hatch pattern to avoid warping the aluminum head. Take your spark plug and screw it into the head before installing to make sure the plug sits flush with the top of the cylinder head chamber.





DIO Cylinder Head Dynamics
After market dio heads are all a little different and it is very important that you have the right plug length for the depth of the cylinder head. Water cooled heads take a longer plug than the air cooled ones. The point of this video is just to take your plug and make sure the plug seats well and is not to deep or too short for your particular head. Remember all the parts are different and checking them does not cost a dime and could cost a motor. Dont guess when a question could cost you nothing to ask. RH





1-Dio Piston RIngs
This explains my understanding of how piston rings work.





Ural Crankshaft Back Bearing Removal
Tool to pull the back bearing off a 750 Ural crankshaft. German made in Canada by Kottwitz Werke.





crank bearing removal on atv or motorcycle - crankshaft repair
http://www.rockymountainatv.com - the easy way to remove crank bearings from ATV and Motorcycle crank shafts. Tusk tool also pulls gears and other bearings.





Yamaha YZF R1 crossplane crankshaft technology explained
The crossplane or cross-plane is a crankshaft design for V8 engines with a 90° angle between the cylinder banks. The crossplane crankshaft is the configuration used in most V8 road cars.3d model of a cross-plane crankshaft demonstrating the 90 degree angle between the crank throws and the large counter weights.The crossplane crankshaft has four crankpins, each offset at 90° from the adjacent crankpins. The first and last of the four crank pins are at 180° with respect to each other as are the second and third, with each pair at 90° to the other, so that viewed from the end the crankshaft forms a cross. The crankpins are therefore in two planes crossed at 90°, hence the name crossplane. A crossplane crank may have up to five main bearings, and usually does, as well as large balancing weights. Crossplane V8 engines have uneven firing patterns within each cylinder bank, producing a distinctive burble in the Exhaust note, but an even firing pattern overall. Their second-order balance, owing to the 90° bank angle and 90° throws, means no additional balance shaft is necessary to achieve greater smoothness. Without the 90° bank angle, a balance shaft may be required. The other prominent design for a V8 crankshaft is the flatplane crankshaft, with all crankpins in the same plane and the only offset 180°. Early V8 engines, modern racing engines and some others used or use the flatplane crankshaft, which is similar to that used in a straight four or flat-four engine. Flatplane V8 engines may use any angle between the cylinder banks, with 60° and 90° the most common. They lack the V8 burble and the superior mechanical balance of the crossplane design, but do not require the large crankshaft balancing weights. Inherent balance of the big ends is like a straight four, and modern designs often incorporate a balance shaft for smoothness. But without balance shafts, flatplane designs have the least flywheel effect of any V8s, which allows them to be more free-revving. The crossplane design was first proposed in 1915, and developed by Cadillac and Peerless, both of whom produced flatplane V8s before introducing the crossplane design. Cadillac introduced the first crossplane in 1923, with Peerless following in 1924. Inline-4 engines can also use the crossplane concept. The 2009 Yamaha YZF-R1 motorcycle uses the crossplane crankshaft and, in the absence of the 90° bank angle of the V8, must use a separate balance shaft geared off the crankshaft to eliminate the inherent vibration (a primary rocking couple) found in this type of crank. A crossplane crank has been used in Yamaha's M1 MotoGP racing models in the past. Yamaha claims advances in metal forging technologies make this a practical consumer product.





(3)- Mating the 54mm cylinder to Stroker Crank
This is the tricky part of compressing both rings while trying to manouver a 4 kilo iron cylinder above them. It does not help with my slightly stiff, 50 year old hands. It should be a snap for you young guys. RH





how to install motorcycle crank bearings
never hit the bearings, even if you use a block of wood with it or a rubber mallet, these cases are designed very precise for this, If you do this job I recomend using an oven or a propane grill (top rack only) to heat these cases. Also since you shouldnt put an open flame on your new bearing stick the crank in the freezer that will cause the crank to shrink ever so slightly and it will slide into the WARM bearings. Sounds crazy but if your crank doesnt spin right or you have premature bearing failure, you will relize why this is done. Yes you can use open flame on the cases if you prefer but dont use it on the bearings. Make sure you remove the seals before you do this too.





Moped Crank Bearing Removal
Just showing how you can use the bearing splitter sold by harbor freight to replace bearings on your moped crankshaft. As you can see the Puch e50 crank I was using was rusted as all hell so it doesn't get much worse then that and I haven't had any difficulty.





$5 Bearing Separator
This is a bearing separator I made from some scraps around the shop... Ok it was more than $5 including the hose clamps and socket head screws... but not by much...





T84J - Disassemble Main Drive Gear
Disassemble Main Drive Gear. Remove the snap ring and the 13 rollers from the main drive gear. According to Joel Gopan, the snap ring is not absolutely required but it does control the movement of the roller bearings. I know that my experience has shown that the three transmissions I worked on did NOT have the snap ring in place. You will also remove the snap ring on the bearing side of the gear. After removing the snap rings (including the one on the bearing as your new bearing may not have this large snap ring; use a block of wood, a vise and a hammer to gently knock the bearing from the shaft.





2-stroke dirtbike motocross transmission crankshaft blind bearing removal tool
We are using a blind bearing slide hammer tool to remove a transmission bearing from a 2-stroke motorcycle engine. This demonstration was filmed in the lab at Western Iowa Tech Community College Motorcycle and Powersports Technology Program. If you would like more info on the program feel free to contact the instructor @ 712-274-8733 ext 1204 or email shane.conley@witcc.edu .





Motorcycle bottom end rebuild part 1 (of 3) crank & bearings
http://www.rockymountainatv.com - How-to disassemble and rebuild the crank and transmission on a modern 2-stroke motocross motorcycle or ATV. motorcycle crankshaft





Fixing An Oil Leaking Crankshaft Seal
Scotty Kilmer, mechanic for the last 46 years, shows how to fix those annoying crankshaft seal oil leaks. If your engine has oil dripping from the bottom, it's often a worn out crank seal that only costs a few dollars to repair IF you do it yourself. And, If you like my car help, be sure to watch my live car talk show every Saturday morning at 10 AM CST on YouTube. I answer your car questions LIVE there. Just check it out at https://www.youtube.com/watch?v=VognjkYaMjg&list=UUuxpxCCevIlF-k-K5YU8XPA&f eature=c4-overview . And remember, every TUESDAY I upload a new video, so don't miss them.





XS650 Crank Bearing Removal
Here is a very simple and easy way to remove stubborn crank bearings without destroying them.




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