Dang it! This sounds expensive!

[Zoom555]

Hey guys! I finished building my Phantom today! It fired right up and I headed down the street but idle was set a bit high so I shut it off and peddled back to my garage. I turned idle down a half turn went down my driveway and pop the clutch. The engine seized and won’t move. I have not taken it apart yet.

I got the engine from B-E off eBay as an open box with no warranty or return policy.

Any suggestions on my next steps?

I know they sell the cylinder kits but they don’t come with gaskets or the needle bearing. I suppose I should really take it apart and see what’s going on.

 

[ImpulseRocket]

Do you know what generation the cylinder is? If not, pull the jug and see what happened (and take some pictures of the ports and piston.)

 

[ImpulseRocket]

As for the wrist pin bearing, no sweat there. An MS460 bearing is the same spec and easy to find and fairly cheap. Base gaskets are YD100, also easy to find and cheap

 

[Zoom555]

Do you know what generation the cylinder is? If not, pull the jug and see what happened (and take some pictures of the ports and piston.)

It’s a 3rd generation. I’ll try and get it apart tomorrow and post some pictures.

The cylinder looked really nice. No edges to get caught on or scratches. I was hesitant to buy a return but figured I take a gamble

 

[ImpulseRocket]

I can think of a few things it could be, obviously none of them good.

We're you running the 20:1 break in ratio at least?

 

[Zoom555]

I can think of a few things it could be, obviously none of them good.

We're you running the 20:1 break in ratio at least?

Yeah I was.

What are a few of the possibilities?

 

[GW's Motorized]

Yeah I was.

What are a few of the possibilities?

The cylinder and head could have become really close friends

 

[Chainlube]

Yeah I was.

What are a few of the possibilities?

A little chain bounce as you headed back to the barn and the chain gets stuck between the drive sprocket and the housing. Pull the clutch arm cover off and take a peek.

 

[ImpulseRocket]

Wrist pin clip failure is actually top on my list. The other two suggestions are also likely.

 

[Zoom555]

Got it taken apart! The bottom piston clip broke.

There is a decent gouge in the cylinder wall and bits of the ring stuck at the top. I think I could clean it up but not sure how to proceed from here.