Please help

[DemonShee]

I was wondering if any of you would be kind enough to share some tips on disassembling the case of a Banshee. I need to get my stock crank out to send to the buyer ASAP. Any tricks you could share or tips of what not to do? I am trying to get my hands on a manual but I am extremely pressed for time and might not be able to wait.

 

Please help me out

 

Notice I asked politely, please no smart ass remarks, I dont need em and neither does anyone else.

[Wallrat]

I dunno how much of the engine you already have disassembled so I'll try to start at the beginning. I'm doing this from memory so some steps might be out of order.

 

Remove the carbs and all the intake crap.

Drain the oil

Drain the coolant by popping off the hose going into the water pump (right side)

Remove the exhaust.

Disconnect the electrical

Remove the engine from the frame

Remove the stator cover

Use an impact wrench or clutch holding tool to remove the flywheel

unscrew the stator and timing plate

remove the sprocket

remove the water pump cover

I think you might be able to remove water pump stuff at this point

remove the clutch cover

remove the clutch using an impact or clutch holding tool

remove the kickstarter assembly

remove the primary gear crap

remove the shift assembly stuff

loosen the head bolts by turning 1/4 turn at a time starting with #10 and working down to #1

remove the head

loosen the cylinder bolts in a criss-cross pattern by turning 1/4 turn at a time

remove the cylinders

pull out the piston retaining pins

push the needle bearings out of the pistons

remove the pistons

loosen the case bolts 1/4 turn at a time counting down (i think there's 12 or 14)

try pulling the cases apart, you might need to TAP the cases with a rubber mallet.

lift the top case half off

remove the crank

 

I think that's pretty much it. Make sure you put all the individual parts into labelled baggies.

[DemonShee]

Thanks a bunch wallrat! I know there is generaly no real science to doing this stuff but ya never know, I have seen some people make some pretty bad mistakes before.

[DemonShee]

Well so far I have the motor out

Cylinders were already off

removed both side covers

 

Now I need to remove the clutch and the stator/timing plate. Do you have to use a Yamaha specific puller for both of these or can you use a universal puller for bearings/steering wheels for cars as well? I have removed the nuts on both with my impact wrench.

 

Once this is done and I have removed the case bolts like wallrat described, does the case simply split? I mean does the crank and tranny parts stay in the bottom half in the position they should be so all I have to do is remove the crank and place the new crank in. put a new seal on and marry the halves back together again or is it alot more complicated than that?

[cb67rs1]

Nope its thats easy

[DemonShee]

SWEET!! Man I am liking 2-strokes more and more.

[ssanddemon]

DemonShee, make sure to use the actual puller for a yamaha flywheel or you will damage it, they bend easy. Any bike shop will have one for $15-20. This motor is real nice to work on, everything stays in the bottom case, so you don't need to grow extra arms to keep the guts together during reassembly. The shee motor is a snap compared to everthing else!

[99Banshee]

Thats all you goto do to split the case...well hell I was going to pay a shop to do it for me to replace my crank but from the sounds of that i can do it myself..plus i already have the cylenders head and pistons out and its laying in my basement..That will save me $200

[99Banshee]

o yah.. sry about asking a questio in here but sence im hear anyway... I wanna lighteen my flywheel if im going to be takig it out anyway..Ive heard it helps..not sure what it improves but anyway where or what do I goto do to lighten it...

[badassbanshee479]

you dont need a puller for the clutch just pull the bolts out of the pressure plate, remove the fibers and plates, then there will be a big nut holding the inner hub on, bend the retainer away from the nut, hold onto the basket with a rag and hit it with an impact, after the nut is off, the clutch assembely should just slide off. after you get that off, make sure to remove the two filups screws holding the bearing retainer on that is behind the clutch basket, the retainer is conected on the top and bottom case halfs, other than that, pull the case bolts, tap the front and rear of the cases and then lift and there is your crank. make sure you get some yamabond to mate the two halfs together, also watch and make sure all the seals fall into there groves, and watch the crank bearings, I know the stock ones have pins in them that sit in groves on the case halves. (my hot rods crank does not have them though) just keep an eye out if you are puting a stock crank back in.

Edited December 7, 2005 by badassbanshee479

[ssanddemon]

o yah.. sry about asking a questio in here but sence im hear anyway... I  wanna lighteen my flywheel if im going to be takig it out anyway..Ive heard it helps..not sure what it improves but anyway where or what do I goto do to lighten it...

445944[/snapback]

PM Boonman about the flywheel, I hear he does a good job of getting them light but still sturdy. The flywheel mod helps by reducing the inertia needed to get the motor spun up. As you know, the shee doesn't have much grunt on the bottom, and the lightened flywheel makes it feel snappier down there.

[Shee-Male]

nice to see sanddemon being helpful ....You know ya love me

Anyways...Ya definatley lighten your flywheel you will love it...I do

If you work with or have access to a lathe its not that hard to do, your just removing material from the flywheel without removine the contacts for your ignition, I did my own and it was pretty sraight forward, I took about 7oz's off.

[ssanddemon]

I live to serve.