[Schroeder]

Probably another victim of the "backwards oil filter" installation.

Yep, seems that way. I hope Honda has learned something from that for their current models.

 

[jaggy22]

Hmmm...well, that's not good news...

The part that threw me was it seemed to spin over manually without extreme effort.

Probably another victim of the "backwards oil filter" installation.

I wouldn’t be surprised. The good news is that the new oil filter was installed correctly… Not that it helps at this point LOL.

New motor ordered And will do a tear down and cleaning of the rest of the bike while I wait for it along with some other parts like a desperately needed chain.

 

[DannoXYZ]

Get a 300 engine!

 

[jaggy22]

Get a 300 engine!

I seriously considered it, but the prices were double over the deal I got for this 250 motor with 6k miles on it - that doesn't count for the ECU or tuner I'd need. I'll salvage the damaged motor and who knows... Maybe rebuild it and bore it out for fun. Always wanted to do a complete engine rebuild. For now though, this 250 will perfectly serve its purpose as a cheap track bike to get me back out there Front suspension work might be next, but we will see after it is up and running.

 

[jaggy22]

Stripped down more of the bad motor today in preparation to split the case (waiting on a tool to come in tomorrow). Was able to drain out metallic and sludgy oil from the bottom end. Even though the PO paid for an oil change (indeed, fresh oil was in there), I am beginning to believe it wasn't necessarily an oil starvation issue as much as it was a neglected oil change that caused the rod bearing to grenade itself.

New motor is delayed at the carrier due to several employees out with COVID, so I'm going to take advantage of the extra time and clean more of the bike while it sits there patiently waiting.

 

[Schroeder]

I am beginning to believe it wasn't necessarily an oil starvation issue as much as it was a neglected oil change that caused the rod bearing to grenade itself.

How many miles does the bike have on the clock. Honda says you can go 12,000km (~8,000 miles) without changing the oil so to get the engine to disintegrate like that the previous owner would have to have ridden the bike well beyond that (or he never did the 600 miles change when breaking the engine in).

 

[jaggy22]

How many miles does the bike have on the clock. Honda says you can go 12,000km (~8,000 miles) without changing the oil so to get the engine to disintegrate like that the previous owner would have to have ridden the bike well beyond that (or he never did the 600 miles change when breaking the engine in).

It has 31k miles on the ODO, so a reasonable amount of time to be neglected. Could have been low on oil too.

 

[DannoXYZ]

More likely low on oil from damage. Old oil doesn't cause that severe of damage.

 

[jaggy22]

Replaced the new motor and reassembled today. Will put new oil and coolant in tomorrow and see if it fires up.