Helping an old friend and his 125

[cubguy]

Did you put on a new coil or upgraded to an electronic ignition?
If so it may be on backwards. I replaced a EI on a simplicity a while back,
the motor would start on the bench but when I hooked it up the the drive line it wouldn't turn fast enough to hit.

[TommmR]

Originally Posted by cubguy

Did you put on a new coil or upgraded to an electronic ignition?
If so it may be on backwards. I replaced a EI on a simplicity a while back,
the motor would start on the bench but when I hooked it up the the drive line it wouldn't turn fast enough to hit.

I did put on a new coil, and was careful to hook it up as the old; power to +, points to -.

[cubguy]

sounds good to me. Before I would get into a major overhaul, what would it hurt to switch the coil around? What faces back, try putting it forward.

[TommmR]

Originally Posted by cubguy

sounds good to me. Before I would get into a major overhaul, what would it hurt to switch the coil around? What faces back, try putting it forward.

Gotta wait till I get the starter back tomorrow-

[Matt G.]

Originally Posted by cubguy

sounds good to me. Before I would get into a major overhaul, what would it hurt to switch the coil around? What faces back, try putting it forward.

He has it hooked up correctly...installing it backwards is not going to magically solve an unrelated problem. So, don't bother, TommmR.

[cubguy]

Originally Posted by Matt G.

He has it hooked up correctly...installing it backwards is not going to magically solve an unrelated problem. So, don't bother, TommmR.

Thank you for your input, sir. Although it is most likely unrelated, If you have eliminated all other possibilities it wouldn't hurt to try. Maybe that is the reason for slow turning, maybe it isn't. I'm just trying to help a guy out.

[Matt G.]

Originally Posted by cubguy

Thank you for your input, sir. Although it is most likely unrelated, If you have eliminated all other possibilities it wouldn't hurt to try. Maybe that is the reason for slow turning, maybe it isn't. I'm just trying to help a guy out.

Understood, but there is no reason at all for that to even be possible. The only thing the ignition circuit shares with the starting circuit is the ignition switch, and even so, connecting the coil bassackwards is NOT going to magically fix an unrelated problem elsewhere. Period.

TommmR-

You say you tried a different negative battery cable...did you replace the two positive cables (battery to solenoid, solenoid to S/G) with new cables? Those can get corroded inside and not conduct well, and they weren't particularly large wire to begin with, IMO.

[David a Calkins]

hi i,m new hear but not new to this problem .i went through with my 125 ,i though it was my hydro ,even pulled it apart ,repalced bearings ,,placed it back ,and still same thing ,rolled the engine over by hand and heard a sound coming from the cam cover ,pulled cover ,and seen weight move on c/r tied a thread on spring ,and removed spring ,replaced with new spring .besure you leave thread on spring ,didn,t need spring going down the pan ,i used a needed noise ,and put engine back in place ,and first try ,it was running ,so hope this helps .David

[TommmR]

Originally Posted by Matt G.

Understood, but there is no reason at all for that to even be possible. The only thing the ignition circuit shares with the starting circuit is the ignition switch, and even so, connecting the coil bassackwards is NOT going to magically fix an unrelated problem elsewhere. Period.

TommmR-

You say you tried a different negative battery cable...did you replace the two positive cables (battery to solenoid, solenoid to S/G) with new cables? Those can get corroded inside and not conduct well, and they weren't particularly large wire to begin with, IMO.

I just got the starter back, and determined I wasted money on the rebuild as it is no better.
I did replace the positive cable from the solenoid to the starter, soldering all terminal ends that were previously crimped on; am not getting any significant voltage drop on anything.

But to David's point, I'm suspicious of the compression release. Is the cam cover the one next to the points cover? It seems impossible to remove it with engine installed as the bottom bolts are bound by the frame.

[_DX3_]

You would be better off pulling the head and verify the exhaust valve lifts slightly during the compression stroke. Otherwise you will have to remove the bolts that holds the motor to the frame and lift the motor up to remove the cam cover.