the bike died on me while I was going about 50mph. luckily, I was going in a straight line when the wheel locked. but the engine won't turn over now. the consensus is, the engine has seized.
what I'm wondering is, what parts am I possibly needing to replace? would be hard doing it by myself or am I better off sending it to a mechanic?
i wouldnt know but that really does suck. i would probably tak it to a mechanic, but also, im not that mechanically inclined.
The engine "seized" ? That's kinda unusual for a four stroke, at least without lotsa accompanying loud noises. Can you give more detail on the "seizure" ? Did it make a buncha noises like bangs or crashes or like it suddenly swallowed a big rock? Or did it just lock the rear wheel like someone had stomped on the rear brake without any other noises? Depending on the particulars of the event, it may be that the engine itself is not seized & that the problem lies in the tranny or the drive chain. What happens when you try to start it? Does it make any noises at all or does it just sit there like the starter button is only connected to air?
well, the engine started bogging down then died, locking up the rear wheel. I'm not sure if there were any noises as this all happened on a pretty busy highway so I couldn't hear very much over all the cars passing by. when I tried to start the bike up again, it wouldn't turn over. when I tried to start it up, I could hear the starter clicking, but nothing else.
if it's not a seizure, then what else could it be?
Put it on the center stand and put it in at least 2nd gear or higher. Try to turn the engine over by moving the wheel in the normal direction of travel. You should be able to get some movement. If you pull the plugs you should be able to turn it over real easy. If you can't than it is probably seized or something else is seriously wrong.
that or, put into a high gear, and sit on bike and try to push it and see what happens. if it is seized, and you are mechanically inclioned, it would make a winter project for you, good luck. :thumb:
it its posible to seize the crank/rod, wristpin, or even a piston, those things are alittle hard to do and generaly require good amount of flogging in a high heat, no lube enviroment.
I am in posession of a seized motor. Looks to me like the pistom seized to the cylinder wall, the con rod ripped the wrist pin out, and then the rod slammed into the case. The cases are damaged, so the motor is not fixable. The PO just did a motor swap. I helped do the swap in exchange for the bad motor. There were enough good parts left to make it worth my while.
It is indeed rare for a 4-stroke motor to seize, but I'll bet yours did. I'd advise just to purcahse a different motor. You can prolly find one for about $350-$500 depending on mileage.
start tearing it down to see what wrong and go from there
no sense in guessing
$350 - $500? :o
crap.
Quote from: krushchev$350 - $500? :o
crap.
Before you freak out, check to see if it
is seized by using one of the methods mentioned above or put the bike in neutral, take out the spark plugs, pop off the right side ignition cover, and take a 19mm wrench or socket to the nut on the end of the crank and try to rotate it clockwise. Should rotate with little effort. If you can't budge it, it is locked.
If you can wait, you'll prolly be able to find a $350 (or less) motor eventually.
alright, I tried manually turning the engine by putting it in 6th gear and turning the rear wheel forward. wouldn't budge. while I was trying this method, I found that the left plug was loose.
and there was no measurable oil level. meaning, the oil level wasn't even touching the dipstick even when it was screwed all the way in. :oops: :x
I had topped off the oil about a month ago. so I guess I had an oil leak somewhere. funny, cause I've never noticed any puddles of oil at any time.
in any case, I'm going to have to do something about the bike soon because it was my only form of transportation.
Yes you have serious problems then, you should check your oil everytime you fill up with gas, to be on the safe side check it everytime you ride, oil seems to be important. I'd start looking for a motor because you dont know what other damage you have done and you could fix it and sieze something right away again. That sucks though. :dunno:
You're checking the oil level with the bike on the centerstand, I hope? If you're checking on the sidestand, the level might not be quite as low as it looks.
But yeah, no oil would explain it!
yeah, I checked it while it was on the centerstand.
I can't believe the oil level went down that fast though. from full to empty in only a month?l
rip the engine down, and see what is screwed if your pistons are ok and the bores arnt scored, pop new rings on them, i have a crank assembly with rods still on it thats in good shape. get some new bearings from crank and counter ballence shaft, new gaskets and seals, bolt it all back together