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Topic: Stranger things can happen, 1989 RM 250 (Read 1231 times) previous topic - next topic
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Stranger things can happen, 1989 RM 250

Started out with replacing stator. Bikebandit. Screws must have been hair short as even with blue loctite they backed out. Stator dropped, flywheel rubbed and it stopped working  :\'(

Gets new stator, no spark, WTF ??   #HMM
Do all the usual diagnostics, drank a wobbly pop and looked at it.   #LOL
Cleaned grounds, jumper from coil ground to engine, cleaned coil ground, etc, etc, etc, etc (make me puke)
At this point I'm left with two possibilities.
Either CDI puked at same time new stator did,
OR the new stator was wired backwards.
Run jumper jumper wires from red to black, and black to red (a$$ backwards)
And now I have spark !! I:I


Re: Stranger things can happen, 1989 RM 250

Reply #1
That must have been a 5 pm on Friday afternoon boo boo.  Does the same stator fit multiple years and multiple configurations?  Could this have actually been the wrong year model part?
Click on the pic VVVV You know you want to....


Re: Stranger things can happen, 1989 RM 250

Reply #2
In my previous when I was even considering used, 87-91(92) 125 & 250 shared stators and cdi (first few yrs) Tho I think the cdi from any of that "era" would work, maybe slightly different map.

Re: Stranger things can happen, 1989 RM 250

Reply #3
That must have been a 5 pm on Friday afternoon boo boo.  Does the same stator fit multiple years and multiple configurations?  Could this have actually been the wrong year model part?
   #LOL

Ya, $hit, it's 4:45 and I need one more to make production  :-T1

Re: Stranger things can happen, 1989 RM 250

Reply #4
I just had a very similar problem with my boat. I replaced the "switchbox"(basically a CDI box and more) and it started to run but it ran like supreme shit. Sputtering and popping. I finally figured out that the new switchbox had the first and third cylinder(it's only a 3cyl) were reversed. There was no way to reverse the plug wires or coil leads. it's built dummy proof. has to be a bad switchbox. Those types of problems can drive you larrys shee crazy! lol

Re: Stranger things can happen, 1989 RM 250

Reply #5
I just had a very similar problem with my boat. I replaced the "switchbox"(basically a CDI box and more) and it started to run but it ran like supreme shit. Sputtering and popping. I finally figured out that the new switchbox had the first and third cylinder(it's only a 3cyl) were reversed. There was no way to reverse the plug wires or coil leads. it's built dummy proof. has to be a bad switchbox. Those types of problems can drive you larrys shee crazy! lol

So you can't "fix" the problem with your boat? Are they replacing box? Refund?

Re: Stranger things can happen, 1989 RM 250

Reply #6
I had to use a longer plug wire and swap the first and third plug wires. I figured it out by marking TDC of each cylinder on the flywheel at the timing mark. then I hit it with the timing light while turning it over. WTF!!! why is number 3 showing up in number one's place and number 1 in number 3's place. lol Ez fix but it cost me a 215$ stator to figure it out.