Help crank shaft play

[andrewjtheis]

Hey guys. Need a little help. I?ve been a diesel mechanic for nearly 20 years, but 2t is a little foreign to me. Even on a 8cyl Detroit this much play is NUTS! Please take a look at the vid (it?s 11sec long) and let me know how fcked I am. Thanks all. https://youtu.be/P3uLmZxEmk4

[arminhammer]

She is a no good!!!

[Gasser Nate]

Yep that left hand side main bearing is cactus bud. If it is a early model Gasser you can replace the crappy roller bearing for a ball bearing. I?ve found they last way longer than the rollers do. It may have had those silly sealed bearing that Gasgas persisted with for a few years too, Had the motor been drowned before? What year is it?

[andrewjtheis]

It?s a 2010 EC250. I thought it was running rough due to jetting. Well... not likely. I?m absolutely crushed because I sold my KTM to make room for this bike (just got it, never ridden it except testing).

[Gasser Nate]

Rebuild it and it will be a better bike than the Ktm mate. It does suck when you buy something that has been poorly maintained. 2010 had the silly sealed main bearings. If you buy aftermarket ones make sure to pluck the seals out.

[Jakobi]

Does she vibe a lot?

The bearings are C4 so some play is expected (on a cold engine particularly), but from your video sounds excessive.

My 2010 had the sealed mains mentioned above. They lasted 260hrs and were ok when pulled down but there wasn't a lot of lubrication left in them.

These engines are easy to work on. Given that she's a new bike to you think of it as foreplay! Crack her open and see how the slug and big end looks. A couple fresh mains and button her back up. You'll know where you're starting from and get many hours enjoyment from it.

Regards poor running, have a look in the carb..