robbieisurfriend
Member
- May 1, 2007
- 85
- 0
ALright guys I just had my local shop go through my bike because it will not start for some strange reason. It is a 1989 YZ 250wr with 175+lb compression and new crank seals (leakdown test great.)
Got freezing rain on it and hasn't started since. Might or might not be the cause though because I was having random hard starts since I bought it. I was also going through plugs more than I should. Sometimes I would spend an hour trying to start it and sometimes it would start first kick. Now all it does is backfire if kicked and occasionally spudder for a second or two when you push it. Figured gas froze in the carb, went through it two times and my local shop went through it two times, clean as can be. Theres fuel and air, and compression, three of the four things it needs to run. All that leaves is spark.
Nows where the REAL ISSUE lies. . .
What electrical component is it? My shop guessed stator from his experience but said it was a coin toss. He tested the spark at the plug and it would jump a gap fine. The resistance in the stator was off but he assured me that almost all bikes/ manuals are wrong when the leave the dealer floor. All connections are good, the cdi box is not cracked and looks sealed well and the stator looks about the same. Kill switch is fine. The only reason he guessed stator was because he has only seen 2 bad cdi boxs in 30yrs and hundreds of stators, especially on yamahas like mine. I was thinking it was the cdi box because it got wet, its on the bars, and it back fires but wont run. He then told me that timing can be thrown off by weak spark also.
All I know to do is throw parts at it till it runs. I really just need some help with guessing. I have little experience and just know what Ive been told and a little bit of common sense. Coil, stator, or cdi box? I can get both the stator and cdi box for about $200 a piece :(. Makes me hesitant to throw cash at it. I also found that I can buy the stator coils for a 1991 WR 250(which is the replacement for the stator in my bike. Part numbers a different by a couple of numbers but on my bike the part number for the one that replaces the original is the same as the stator on the WR. Is it a safe $100 assumtion that the coils will fit on my original stator alright. I cant even put into words how bewildered and frustated I am with it right now. :bang: I spent less than $500 on it and it still needs the tranny fixed so parting it is still a possibility. I like the bike though and would love to keep it. Any thing you guys have for me will be greatly appreciated. Thanks, Rob.
Got freezing rain on it and hasn't started since. Might or might not be the cause though because I was having random hard starts since I bought it. I was also going through plugs more than I should. Sometimes I would spend an hour trying to start it and sometimes it would start first kick. Now all it does is backfire if kicked and occasionally spudder for a second or two when you push it. Figured gas froze in the carb, went through it two times and my local shop went through it two times, clean as can be. Theres fuel and air, and compression, three of the four things it needs to run. All that leaves is spark.
Nows where the REAL ISSUE lies. . .
What electrical component is it? My shop guessed stator from his experience but said it was a coin toss. He tested the spark at the plug and it would jump a gap fine. The resistance in the stator was off but he assured me that almost all bikes/ manuals are wrong when the leave the dealer floor. All connections are good, the cdi box is not cracked and looks sealed well and the stator looks about the same. Kill switch is fine. The only reason he guessed stator was because he has only seen 2 bad cdi boxs in 30yrs and hundreds of stators, especially on yamahas like mine. I was thinking it was the cdi box because it got wet, its on the bars, and it back fires but wont run. He then told me that timing can be thrown off by weak spark also.
All I know to do is throw parts at it till it runs. I really just need some help with guessing. I have little experience and just know what Ive been told and a little bit of common sense. Coil, stator, or cdi box? I can get both the stator and cdi box for about $200 a piece :(. Makes me hesitant to throw cash at it. I also found that I can buy the stator coils for a 1991 WR 250(which is the replacement for the stator in my bike. Part numbers a different by a couple of numbers but on my bike the part number for the one that replaces the original is the same as the stator on the WR. Is it a safe $100 assumtion that the coils will fit on my original stator alright. I cant even put into words how bewildered and frustated I am with it right now. :bang: I spent less than $500 on it and it still needs the tranny fixed so parting it is still a possibility. I like the bike though and would love to keep it. Any thing you guys have for me will be greatly appreciated. Thanks, Rob.