OK. After my blown motor. Got the motor tore down. Just got the cases split today to get the piston pieces out. Found a crack in the right side case. THIS SUX!!! Now i gotta find a case on ebay! Now I took it to my local dealer and found that the rod is junk. THIS STILL SUX!!!!!!

 

Bummer man. You arnt havin any luck with that thing are you?

 

If i were you when you fix it dont take it to a dealer ,id get a performance shop to do it itd probably be cheaper and you will be a lot faster...that sucks that it broke though

 

Have your crank rebuilt by a good crank guy, either twister or crankworks. Have them rebuild the crank, true it and WELD it. It will be worth the money. About the case. Sorry bro, thats the breaks sometimes. This might be a lesson to check your top end ever now and then though.

 

Shattered piston, blown rod bearing (I am guessing that is what you mean by junk), 2002 model? Are you sure that oil injector is working right?

I have rebuilt singles cranks myself with a shop press, but you are best off to have a performance shop do it like was said. I wouldn't really worry about welding the crank on a single especially unmodified.

 

opps its a blaster...lol next time ill look closer to what is broken. Sorry....

 

When you press the halves back together how do you get them straight? You'd have to use a jig in order to align them perfectly. Do you just eyeball? If you do how can you possibly get it within tolerance?

 

I have a friend that made up a stand to test the runout on Briggs & Stratton cranks. You lay the crank on it with the bearings in place and then put a dial indicator on the flywheel and output shafts. Start pressing it together while checking the indicators, and when you are sure it is right, drive it home. I have rebuilt a RM125, 2 CR250, 250R, and a tecate-4 crank this way. The first one was the RM and I was so afraid of it slinging apart since the engine will spin well beyond 12,000. It is still running today. For the most part, I don't recommend doing it yourself unless you can deal with blowing the cases if it isn't right. I am trying to figure a way to build a stand for the banshee cranks, but twins are going to be harder. Kind of sucks that the rod pin don't press out on a stock banshee crank though.