Bike has stage fright/blown motor?

[usafcommando]

I moved this from the biikes only frum to here....

Pretty sure my pistons ate themselves on a ride tonight and the motor completely seized. Was very
strange though....after riding at a "sporty" pace, nothing out of the ordinary, went to accelerate not hard so clutch in hit second, through second, clutch in and the revs dropped to zero. Sooo instead of letting the clutch out I held it and coasted to a stop. Bike has 22k on it and i bought it with 17k on it. Took and breath and tried to start, click, sh!t. Tried to roll it in first, yeah right. So I either spun a bearing(s) or destroyed a ring(s), or piston(s) or who knows what. Wont know til I get it apart. The funny thing was it didn't smoke or vibrate or knock or show any signs it was going to die, just did. However when it did die, i looked through the oil window and it was jet black (less than 300 mi on oil change with mobil 1 10w30). . Sooooo on the way home in my buddies truck I decided lets make the most out of it and decided im gonna rebuild (depending on whats wrong) and bore it out 2mm over to make it a cbr637rr lol. Thoughts? Questions? Sympathy?...anyone with a loner bike for me to use in between ...

[usafcommando]

Update...today went home and experimented with it. Rolled it down the driveway and popped it in 4th and it started and idled went about 200yds and it died again in the same fashion...wtf?? Tried again in third and motor made a horrible thunking noise bucked a little and died. Did the same thing in second and the same thing happened, except more violent. So i think that rules out any wiring issue me thinks. Drained the oil to find it was not as black as i thought and looked alright, but there was what looked like a silvery dust in the oil...ekk. Is my motor truly done for or has someone had the same problem. Again there was no warning of anything wrong...no smoking, no smells, just no starting. Starter would not crank the engine either, it clicks like it engages then but just stops and doesnt turn. Pretty sure the engine is done.

[ga_skyline_rydr]

Just out of interest what year and make is your bike?

[usafcommando]

Sorry its an 03 cbr600rr

[ga_skyline_rydr]

Don't remember ever hearing a Honda doing what you are describing. Honda's usual claim to fame is bad stators or rectifiers.

[ROCKER]

Try the simple things first.
It idled but only goes Click click when you try to start it, usually means dead battery.

[DecepticonDon]

Don't remember ever hearing a Honda doing what you are describing. Honda's usual claim to fame is bad stators or rectifiers.

+1

check for electrical issues before taering into the motor.

[NiceGuysFinishLast]

Dude. Check your battery, and check your gas.

[usafcommando]

Im not tearing into it yet dont worry...checked the battery and got a solid 12.6 volts (did that last night).
I mainly work on cars and only have some minor bike experience but I know all the basics and how everything works (electrics and sensors and what not)...my biggest worry, as well as my friend who races and builds bikes, is the starter not being able to turn the motor over. I dont think its the starter as the bike dying and starter not turning over would be weird and unlikely. And yes i have about a full tank and there was fuel in the line when i pulled the gas tank; the fuel pump primes and runs as well. Could this be a fuel issue though? What would it be and why so sudden? There seems to be a strange mix of electrical and mechanical problems with the bike, like problems that wouldn't necessarily go hand in hand.

[NiceGuysFinishLast]

Did you check the battery under load? It can read fine and still drop way down when you try to start the bike.

[usafcommando]

Didnt try that...will do tomorrow, i was checking continuity with everything and got tired so i came in. Thinking about it that could make sense, as the battery wouldn't be able to hold up while the bike was running. QUestion though...I know on most cars, once the car is started the alternator is essentially running the car, hence the constant 14.4 volts for most. Im less familiar with generators/statos, but do they support most, if all, of the bike's electrical load as well? I ask this cause that could possibly explain the bike dying for no particular reason...:confused:

[Wheedle]

Did you check all the fuses? The main fuse on the solenoid? Sidestand switch, clutch switch, gear position sensor, wiring to the battery and starter? Do you know that the starter is indeed getting full voltage when you try to start it? Have you pulled the plugs to check them and to see if the motor will turn without the plugs? There will still be some resistance from the cam drive and valve springs.

A slivery dust in the oil at 22k likely is clutch plate wear ( drive and driven ) and general bearing wear, not unexpected, especially if the oil and filter have not been changed regularly in the past. Usually lunching an engine is very dramatic.

Honestly, since the problem started with a pull on the clutch, I would start with that switch.

Or... not to be an ass... but take it to someone who knows what they're doing? Or buy a manual?

[Wheedle]

Didnt try that...will do tomorrow, i was checking continuity with everything and got tired so i came in. Thinking about it that could make sense, as the battery wouldn't be able to hold up while the bike was running. QUestion though...I know on most cars, once the car is started the alternator is essentially running the car, hence the constant 14.4 volts for most. Im less familiar with generators/statos, but do they support most, if all, of the bike's electrical load as well? I ask this cause that could possibly explain the bike dying for no particular reason...:confused:

Modern sportbikes are designed to function at high rpm, and produce very little charge at or near idle. Its not a good idea to run a bike ( especially a fuel injected bike ) without a battery in it.

[Over TWO Customs]

I would pull the clutch cover. I have seen some destroyed clutches lately that locked down a motor with the quickness. 12.6 volts has no impact on cold cranking amps. I have also seen batteries pull 12 volts and not crank dick.

[usafcommando]

The more and more I think about it, the more I think it could very well be the battery. Ill get o'reilys to check it out tomorrow. I have had the car i built (280zx) seize up on me after a large chunk of metal kicked up and punched a hole in my oil tank from a construction site. Knucklehead (me) didnt notice the oil pressure drop to zero and the temperature spike, all of a sudden it konked out. But remembering it, it was a little more spectacular...and smelly lol. Im gonna feel pretty retarded, and relieved, if its just the battery haha. I do have a motor lined up cheap if it turns out to be something more sinnister.