Splitting the cases on a Tri-z

[ssskipeee]

As you may be aware the piston in my z was shot and left a bit of a mess down below so i have to strip the bottom half to clean that out too.

as i`ve never stripped an engine in a bike before i have no clue on splitting the cases and what to do/what not to do so any help would be great.

[edog]

Do You Have A Manual?

[ssskipeee]

no i dont i dont have anything yet just starrting out

[Dirtcrasher]

Your not in Kansas anymore Dorothy..................

Your gonna need alot more than just a manual, or a really big fat wallet....

[rugabugadouglas]

i know on my 110 a air chisel and some wood shims helped me alot

[sblt500r]

i know on my 110 a air chisel and some wood shims helped me alot

i hope your kidding! an air chisel is very bad for aluminum cases!

[GoodKarma]

Don't worry, you shouldn't have to be a Massachusetts rocket scientist to figure it out!

Go here, http://www.drivehq.com/file/ShowFolder.aspx?G=1&shareID=233462 , and download the manual. Look very closely to how things are put together, before you take it apart. You'll get there, just take your time and don't get in a hurry. There are a bunch of folks on here that are very good with these, and more than willing to help you finger stuff out as you go along.

Things should start to fall apart with just a little tap, or you missed a bolt!

[Rennat_2006]

I had the manual when i tore down and split the cases on my 125 and it was easy.

Im actaully doing it again right now as we speak because the guy i traded it to for my 540 siezed up the big end of the connecting rod!

[Dirtcrasher]

[QUOTE=GoodKarma]Don't worry, you shouldn't have to be a Massachusetts rocket scientist to figure it out!

LOL - He's not building a rocket, I could help if that were his post....:D

As far as splitting cases go -

I'd be willing to bet that well over 50% of every case that gets split is ruined in the process or the parts get lost and the order in which they were installed isn't the same when going back together.

Splitting cases isn't simply taking bolts out, looking at some pretty pictures and placing parts on a bench and then reinstalling them in the same order.

It is checking tolerances, making certain parts are assembled correctly, diagnosing the cause of a failure, replacing critical parts while it is apart and so on and so on.

How many crank seals and bearings get damaged during installation?

How many motors seize up again because the lean condition was caused by an intake leak? or a lean carburetor condition?

How many piston rings get broken because the cylinder is slightly spun during the install? or not aligned properly on a fourstroke? or even with the right markings UP?

How many cases leak after there split because someone used a screwdriver?

How many crank threads are ruined from not using a puller?

How many 250R counterbalancers crack or back out because they were ignored?

One tiny detail can immediately launch a motor someone just spent 500$ on. I'm not talking about race motors but just a simply 2 stroke, and they don't get any easier than that.

I'll never claim to be a "genius" but a dam good mechanic and machinist I am. I still screw up, and hate myself when I do but I certainly won't advise anyone to split an engine case without a whole lot of top end rebuilds under there belt.

If they don't realize that the motor and machine need to be absolutely spotless before the spark plug is even removed then they are much better off leaving the repair to someone more qualified than themselves. :beer

[ceaserthethird]

Well Said ... DirtCrasher !

Put it back together , Pressure Wash it ...

Look's like the Tri z was beat pretty hard ...