How to free up a stuck motor on a CBR250RR

Hey All,

Well I had my newly acquired CBR250RR MC22 delivered to @Phil today, its a 1993 model and its been in storage for a few years , Phil initially hooked a battery up and there was no lights, disco is dead on this one.

He found the main fuse was missing and fitted a replacement and the all lights on the dash came on, he confirmed the oil was fresh and there was the correct amount in there. When he hit the starter, I could hear the starter solenoid click so it lead me to believe maybe the solenoid was the culprit. Phil then removed the starter motor lead from the solenoid and tried pushing 12v directly to the starter motor and it just cracked and popped.

We have 2 options in my mind, either the engine is locked or we have a dodgy starter motor. Phil is going to remove the starter motor and test that tomorrow, but I was interested in finding out what process you would use to free a stuck motor.

For me, I have always been told, 2 tables spoons of oil down each cylinder, leave for 24-48 hours then try the starter, if that doesn't work, remove the engine side cover and use a socket with a long shaft on the crankshaft bolt to manually rotate the engine and free it up.

Any ideas would be appreciated, although Im hoping its just a starter motor

Cheers

Chris

 

Looks prime to become a race bike

 

Haha, i stepped up and paid $345 aud for this little gem delivered to Phils place

Bargain

 

WHAT A STEAL!!!!!

 

some diesel down each plug hole and leave a few days. then with plugs out give a gentle turn.

 

Risky, we know you love diesel, but olive oil is a lot healthier

 

might make you more regular.lol

 

If it's rust that is your problem a lot of the old timers use Molasses to dissolve the rust. It's not a fast process but it will remove the rust and not effect the fresh metal. It's a great way to soak parts to remove rust. Normally water it down 1:5 or something. Stinks when it starts to ferment.

 

If it's seized up you'd be mad not to strip it anyway Murdo. It's a good way to get engines apart without causing any more damage than what is already there.

 

I spray some WD-40 inside to help things stay loose. I wouldn't put anything except engine oil, petrol or something that will dissolve or burn up into the cylinder. If it's damaged, it's not gonna be fixed by pouring stuff in there. Like Fox said, rip it apart if need be.

 

well, the word from Phil is that engine is stuck pretty hard, he is pulling the engine out tomorrow and will whip the head off. He left oil in each pot overnight then removed the engine side cover and cranked with a breaker bar, no movement at all. He removed the exhaust as it was full of water, so I guess now its a parts bike. We have bought so many non runners where its been a 50c fuse or a clean of the carbies and they run, I had to buy a lemon at some point at least I didn't pay alot for it.

On a positive note, anyone need MC22 parts, I have plenty

 

Hmmmm

 

Hahahahaha interesting. Track bike build.

 

Willing to ship to the US?

Items I'd consider: head, radiator, harness/ECU, that "useless" rubber bit that the plug wires thread through..