One of my students tired starting our project bike while it was in gear thinking it was a good way to test the clutch sensor...everything worked (except the clutch sensor) so the starter motor tried to turn the engine over while the bike was in gear...and failed, of course...it sounded like it started to and then seized up real hard.
Now the problem is that even with the bike in neutral, it won't turn over at all...just continues to sound like something is seized up.
So he tried to start the bike with the bike in gear and without pulling in the clutch? When doing that (accidentally) doesn't the bike suddenly lurch forward as you freak out and take your thumb immediately off the starter? I think everyone has done that once. Never had it break a bike though. Sorry to hear how difficult this project has become....
Yeah, I felt the same way...I couldn't think of what would have gone wrong which is why I asked you guys...as for the project being a pain, that's the way these things go sometimes...not a big deal
Starter sure as heck sounds like it's engaging just fine...can't see it, of course, but I'd bet my job it's working just fine. Starter goes, but then it just sounds like the engine is seized up and won't turn over
Rear wheel still spins in neutral just fine and with the clutch pulled while in gear...but that should be that way since it's essentially no longer connected to anything else, right?
So after reading all of your comments this morning and then doing a little more looking around the internet and thinking, I'm pretty sure that we just hydrolocked the engine by overfueling it. I'm not 100% certain that's what happened, but I think that may be our issue. I'm going to go try to start it again and if it was hydrolocked with gas, it should just turn over again just fine like it did before.
If it did not start, odds are good you didn't do any damage. Hydro lock usually blows the rings off the cylinder walls, and can bend the rod if it's an extreme case. Since you couldn't get the motor to turn past the point that it stopped, it's unlikely that it caused damage. If you didn't force it past the point where the liquid couldn't be compressed, shouldn't be an issue.
That's kinda what I'm hoping for. Since we didn't have ignition and we didn't even attempt to force it beyond where it stopped, I'm hoping we're still good to go.
The other question on my mind, however, is why did it happen in the first place?
We don't know for sure if it did hydro lock. If it did, one or all cylinders.
Why would it while in gear and not in neutral.
IF it did in one cylinder, and you didn't pull the plug to blow it out the only place I know for the fuel to go, into the crank.
SO strange as it sounds would be tempted to reproduce the problem. BUT before I did, pull the injectors.
With no points of ignition turn the bike over first in neutral and see if you get fuel. This would give a hint about the ecu. Is it seeing what it needs to try and run the bike.
IF the ecu is happy, will fire the injectors and coils.
Depending on what you find would determine were to go from here.
This is a pain, but a fantastic trouble shooting experience.
Put up what is need to run, and then divide and conquer. Process of elimination.
Cross out what you determine is NOT the issue. Your class will learn 10 times more than if it fired right up.
If an injector stuck open, it would constantly spray fuel, for as long as the pump runs. First time the intake valves open, it all gets dumped into the cylinder. More than a few cc, and the piston can't get to tdc.
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