91 650 superjet wont shut off

[CaMo_FroG]

ok here is my problem...

i have 1990 SN superjet it has a factory B-pipe, and a MSD ignition, other wise stock, lately the stop switch/ lanyard switch wont kill the motor..

I've taken apart the switch assembly on the handle bar and cleaned all the contacts with electrical cleaner and carefully put back together .. worked a few times till i went riding again... didn't seem corroded.

im not certain but its most likely possible the plug wires are original ... (red)

also the only other thing i can think of is that i put new plugs in it ..
they were NOT resister plugs and the ones i took out were? is this were my problem is ? or is it something to do with the CDI going bad? or is it in the MSD?

any help is appreciated i dont think its the handle bar switch as i've swapped it with my other ski (93 sn sj) and it still does the same thing. (other ski works fine- all stock)

 

[fast superjet chase]

is it reving up on its own or just at an idle and wont shut off

 

[B0000M]

could be corrosion on the plug further down in the engine bay, or a broken cable. try disconnecting the plug near the back end of the engine bay and putting a short across that with a bit of wire or something to see if that will stop it.

 

[anthony_]

I had the EXACT same problem on my '90 SN back in March. I just needed to replace the silinoid (not sure if that's spelled correctly). Got that replaced and the problem completely went away. Rode all summer without any reoccurances. The part cost me like $30 or something.

good luck.

 

[CaMo_FroG]

it doesnt rev it just idles and wont shut off ...after the kill as been pulled or repeated times hitting the red button...

the solenoid huh? i'll check that out thanks