Suzuki Dirt Bikes Forum

Loaned the bike to a friend was working. Got it back and was told it died and wouldn't
start on the track. I managed to start it for just a few seconds two times. It would sputter and die. Now the kick start lever is stuck fast....won't move. The bike will roll out of gear. Clutch works... Any ideas? Maybe a bearing???

I don't mind tackling this if I have a starting point. I've never worked on a motorcycle before but have worked on cars extensively. Bikes are my new hobby and I know I need to learn to repair them so.....

Please give me your opinion as to the problem!

Thanks!

Marty  

sounds like he/you seized the engine by over revving it or something, maybe he didnt put mixed gas in, flat gas will kill ur smokers  
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03xr100 soon to be crf150r expert
id rather be a loser than a quitter

I mixed the gas they used. They were only out an hour or so. My point in letting people know it was on loan when it first stopped running was so that they'd understand I don't know what happened the moment it quit. It could have been over rev'd I'm sure....but I really don't know. The engine did kick over a couple of times after I got it back and seemed to have pressure..but then it locked up tight.

Thanks for the reply!  

It sounds like your piston seized.  
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I love the Turtle Posse!

yup. your piston is probably seized and it felt like it had pressure because of the piston rubbing against the cylinder wall im guessing. your going to need to take  the head and the cylinder off. and if you dont have a manual i highly recomend you get one. your gonna need a clymers...~pat  
PEACE GUYS ITS BEEN A BLAST!!!!! ~patrick

yep you have a seized top end. you might have to resleeve it, depending on how bad it is.  
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The only reason a four-stroke can beat a two-stroke is because of the double displacement advantage

1996 RM125

top ends normally dont just seize. they naturally seize on there own if the top end is worn, a worn piston or cylinder will cause this. if its driver error then the only thing i can think of is they overrevved it. but its common sence to shift once the engine goes flat. on 2 strokes when the rpm's go past the powerband the engine goes flat. it revs higher and sounds like your going faster but you start to slow down. if this happened on a track then they probably wrecked and the thottle got stuck or it was worn to begin with.  
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Ride 2 strokes, buy 2 strokes, save the 2 stroke.

1998 cr125
2002 cr80

yeah. it can be a combo of things too. lean jetting. over revving. worn topend. an air leak in your cylinder. anything really. sounds like it was operator error though. ~pat  
PEACE GUYS ITS BEEN A BLAST!!!!! ~patrick

yeah i forgot lean jetting, dirty air filter also. but pat you cant say it was driver error because they never said when the last time the top end rebuilt. there is a 50/50 chance that it is your fault or its there fault. if it was driver error, i doubt it would have broke anything, if anything the ring or a small peice of the piston could have broke. but it would have loosened up after the bike cooled down. i am going to say its your fault because it had to be a worn top end or dirty air filter. just becuase it is still seized. the only way to find out is to tear down the engine, look at the damage and measure to see if everything is in spec. if the top end is in spec and the filter is clean or you dont see any small dirt particles in the engine then you can safely say it was there fault.  
______________________________
Ride 2 strokes, buy 2 strokes, save the 2 stroke.

1998 cr125
2002 cr80

The way you said it would start for a few seconds and then shut off sounds like the spark plug fouled, but if the kickstarter won't move then it is seized up. Happend to me on my YZ 125 4 days after I got it. $1100 to fix. Worst feeling ever man  

$1100 to fix a seized engine? jesus..........I have no where near that in my 490, even with a spare jug bored fifty over and another head. Tats a lot did you have a shop do it?  
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The Idle of a 500 2 stroke is Akin to the Devils Heartbeat


I'm not afraid of the dark, I own the NITEMARE that lurks within.

1100. you must have blew out the crank too. that is the only thing i can think of that would cause it to cost that much. my friend destroyed his engine one time and seized the crank, broke the rod, shattered the piston, destroyed teh cylinder and head and it cost him roughly that much to get it fixed.  
______________________________
Ride 2 strokes, buy 2 strokes, save the 2 stroke.

1998 cr125
2002 cr80

Well I ordered a clymers and am going to tackle this myself.

Just for clarification, the bike wasn't actually run at a track. It was just some off-road area. My friend and his son borrowed the bikes with his son riding the RM.

When I got the bike back he told me it stopped running I tried to kick start it and it sputtered briefly with throttle and then died. Did this a couple of times and I parked it for the winter. Tried to start it this spring and it didn't fire at all. A more knowledgeable friend pulled the plug and checked it. Spark was there and the plug wasn't fouled. He didn't think it was seized. A couple of weeks later I got back to it and cleaned the fuel system. Tried to kick it and it slowly locked up. It couldn't be a crank bearing or something could it? I'm going to take the engine apart but want to know if I should start top or bottom to locate the problem based on what you all think.

Thanks again.  

i am going to take a guess at it. the top end is worn. you let him borrow it and it died becuase the top end is worn. when it died a peice of the piston chipped off and fell into the crank. it would kick and sputter becuase the top end isnt seized and its in roughly decent condition, but its worn. so as your kicking it the crank is spinning and this peice of metal is sitting down there then as it keeps spinning the peice of metal got lodged into the crank. if i am correct you will need to have the cases split and might have to get a new crank, depends on if you can get that metal out.  
______________________________
Ride 2 strokes, buy 2 strokes, save the 2 stroke.

1998 cr125
2002 cr80

elko6:
i am going to take a guess at it. the top end is worn. you let him borrow it and it died becuase the top end is worn. when it died a peice of the piston chipped off and fell into the crank. it would kick and sputter becuase the top end isnt seized and its in roughly decent condition, but its worn. so as your kicking it the crank is spinning and this peice of metal is sitting down there then as it keeps spinning the peice of metal got lodged into the crank. if i am correct you will need to have the cases split and might have to get a new crank, depends on if you can get that metal out.

I agree, sounds like a circlip or piece of piston skirt.

I would not try kicking it over untill you have pulle dthe top end and looked!  
Dave H 2006 YZ250
(2008 YZ 125 son)