Motor won't turn over

[SD moto man]

I can't get my motor to turn over after installing a good condition used motor on my bike.

First I tried engaging it going down hill and it skidded my tire a few times, so I know the clutch is fully engaged. I took off the clutch case and it appears the small gear that turns the motor is locked up. I took off the cylinder head and can't get the piston to move up or down.

Now what?

 

[crassius]

assuming that a 'good condition used motor' was turning freely before being installed, it is likely that something fell into one of the ports or down the spark plug hole during install - could also be that something loose got into the gear train

I'd pull the drive gear off the crank first to see if the piston freed up, if not, pull the barrel to check for debris.

 

[Bikeguy Joe]

But was it really a "good condition" used motor?

 

[scotto-]

But was it really a "good condition" used motor?

Yes it was, it ran like a champ when I removed it nearly 2 years ago then it sat on a shelf in my dry garage. Possibly the bearings froze up for who knows what reason. I cheerfully refunded moto's money. I'll split the case when I find time to see what the hay is up with it. Piston, rings and cylinder look fine still.

 

[Bikeguy Joe]

Keep us posted on what you find.

 

[scotto-]

Keep us posted on what you find.

I certainly will when I can find the time......moving out of my house ATM after 18 years in it.....I'm swamped .

 

[Bikeguy Joe]

I bet, I lived at my previous address for 20 years and it took three days to move.

 

[Mike B]

Why are you moving out of your house?

Bigger house?

 

[scotto-]

Why are you moving out of your house?

Bigger house?

Unfortunately not......short sale

 

[Mike B]

Ooouuu, smaller house.

Bummer dude.

 

[scotto-]

It's more like no house.....yeah, bummer.