Pics of engine teardown. What went wrong?

[joey83]

Hey guys. Bought this Banshee a couple weeks ago and got it torn down last night. According to previous owner it had low hours on rebuilt top end and he loaned it to a friend and the friend returned it with a bad motor.

I'm about to start going back together with it and don't want it to lean out and burn up again. Are there any common problems I need to look for? Intake boots etc look good. I 'm guessing he filled it up with straight gas and burned it up. The left rod bearing got HOT and it threw a rod through the case. Any opinions??? Thanks!!

 

[joey83]

[Phelps]

looks like lack of oil

[joey83]

[joey83]

[#1JUANstunna]

Straight gas FTW! That's my guess

[joey83]

Left side had broken rod. This is the right side piston.

 

[ginger]

looks like it had minimal oil or a bearing blow up

[joey83]

looks like lack of oil

 

WOW that's a sick bike! Thanks for the reply. Straight gas you think? Paranoid about melting this thing down after a fresh rebuild....

[sheerider1026]

Straight gas. That engine was ran with no lubrication. My guess is that someone topped the tank off thinking it would be ok since it still had a little mixed gas in it. Dumbasses

[dajogejr]

Pull the other side piston and look for the same discoloration, that's a whole lot of heat, especially to break at the big end of the rod like that.

[ClayAiken]

"Lent it to a friend, Came back with mad motor" Straight Gas....

[lms1977]

Can you look at the gas in the tank? Is it mixed although sometimes its hard to tell.

[wfobasheeboy]

can you say GOT OIL

[T_Shee]

just make sure you do a leak down test when u get it back together. do a search on here if you need help with it. ask any question you have and u will get a quick response. good luck