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need help
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yzrider03
New User
| Posts: 7
| Joined: 07/08
Posted: 10/04/08
04:13 PM
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Ok i was riding my 2003 yz125 at my local track for bout an hour when it started acting like I had just started it and bogging down the whole time so i rode it for a while thinking it would quit but it didnt and my bike just quit and wont start and rolls in gear and also is real easy to kick?? Anyone know whats the problem
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Posted: 10/04/08
04:23 PM
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your top end is shot.
--------------------------
'05 yz125
go blue and you'll need a wheel chair
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bhorrigan
Addict
| Posts: 3281
| Joined: 11/06
Posted: 10/04/08
05:12 PM
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Sounds like you have lost compression due to a worn out top end. Time for some maintenance.
![bhorrigan]()
Bill H. 2000 CR250R
![bhorrigan]()
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Posted: 10/04/08
07:17 PM
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When i first asked about this problem I was like "how the hell can everyone just say that thats the problem, when all they kno is my short discription"
its your top end, its almost unmistakable. same thing happend to me, pretty much the way you explined it.
no compression - easy to role in gear - wont start no matter what = new topend
ps. get a wiseco pistion, great pistion, moves the powerband down alittle ***
rockymountainmc.com - i got an air filter, wiseco pistion, gaskit kit, and wristpin bearing, on two day air shipping for just 107. 5 bucks for 2 day air. killer.
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elko6
Addict
| Posts: 4365
| Joined: 11/07
Posted: 10/04/08
08:03 PM
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ok here is the thing with wiseco. they only make one size piston. oem or stock has 4 different sizes. because each cylinder is diferent. now what you need to do is measure for spec. measure the cylinder diameter, piston diameter, and ring end gap. if the cylinder is out of spec then i suggest you get your cylinder replated by wiseco and get a wiseco top end kit and gaskets, always use new gaskets. if the cylinder is still in spec then i suggest you look on the piston it will have a letter. get the oem piston with the same letter. it should be a, b, c, or d. the oem will have a more accurate fit for your cylinder and provide you with better performance.
______________________________
Ride 2 strokes, buy 2 strokes, save the 2 stroke.
1998 cr125
2002 cr80
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atkkid250
Addict
| Posts: 2341
| Joined: 07/08
Posted: 10/05/08
11:02 AM
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yeah.. oem and wiseco, the ongoing battle. o and dont try to start it anymore! you can mess thigns up. and i like oem, but sometimes its easier to get wiseco, but oem will have hte best fit for your engine! ~pat
PEACE GUYS ITS BEEN A BLAST!!!!! ~patrick
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Posted: 10/05/08
05:18 PM
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damn, i just ordered mine. everything fit perfect.
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elko6
Addict
| Posts: 4365
| Joined: 11/07
Posted: 10/05/08
06:28 PM
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were talking about a difference of like .01-.03 mm. it will seem like it fits the same but it will not perform the same, you may not notice a difference. but some people can. no matter what to you the bike will run better. but if you know what your bike feels like when its running its best then you may notice a slight decrease in performance.
______________________________
Ride 2 strokes, buy 2 strokes, save the 2 stroke.
1998 cr125
2002 cr80
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