Messages

Hi, thanks for the info. I have an update . . . . though I had previously cleaned all ignition mounting surfaces, today I made double-sure and cleaned them all again including both sides of the stator core plates, then put all the components together. Before mounting the flywheel magnet I placed a piece of sheet steel across the back of the magnet and found virtually no strength, the piece of steel lifted off easily with barely detectable resistance.  Touching a screwdriver to the inside of each magnet does show there is some magnetism still present though it seems weak.

After mounting the flywheel and securing the nut, I directly grounded the coil to the engine (engine is on the bench with head removed) and then used an electric drill to spin the engine forward looking for spark on the grounded plug.

Much to my surprise, after I got the rpm's up a bit, I did see spark at the plug but it looks rather weak and dubious whether it would spark under compression.

So, in your opinions, is it safe to assume that the stator is probably ok and useable and that the fault lies with a weak magnet flywheel.  My next question is can a replacement flywheel be purchased separately?   Thanks - Dave

Hi Kevin,  just wanted to let you know that we got the nut off the clutch hub today . . .  put a bit of heat to the nut and squeezed a few extra PSI out of our compressor and the nut broke loose with the air gun.  Thanks again for your input on the nut . . . indeed Left Was Loosey !!!  Bye for now,

Dave Fisher

Hi all . . . . we've just discovered the original Motoplat CDI ignition is probably toast.  From what "tests" I've found online I think the ignition coil might be ok which leads me to believe the stator is faulty.

The stator looks a little rough and when we first took the magneto cover off the engine we found an incredible amount of corrosion on the rotor magnet and throughout the compartment, so it's not too surprising if poor maintenance has lead to stator failure.

My question now is:  is there a modern alternative that we can order to replace the Motoplat system ??

Thanks in advance,

- Dave

Hello to all . . .  we`ve got cases apart on the engine now and there are obvious signs of wear including crankshaft bearings and trans bearings.  Another item that caught our attention right away is the gear selector stop pin that moves along the length of the `Shift Drum`, if it can be called that.  The pin which protrudes about 5mm outside of the drum on each side is attached perpendicular to the shifting selector rod.  

MY QUESTION IS: can this pin be removed for replacement or repair?  I am assuming that it is a press fit into the shifting rod OR the pin might consist of 2 pieces that screw into the rod? The pin is quite worn, unfortunately can't post a photo. I can be emailed directly, [email protected] , thanks in advance for any help !!

Hello to all . . . . wondering if anyone out there has motor experience with a Sachs 125cc engine?  We have a '73 Penton Six Day and want to get inside the engine cases to evaluate condition of the transmission.  We have run into a very stubborn 25mm nut on the clutch hub that will not come free.  I am pretty sure it is a left hand thread nut, have tried both directions to no avail.

So, wondering if anyone can confirm if it is a left hand nut ?  And maybe someone has a good suggestion to bust the nut free other than a air impact wrench ??  You can email me directly at:
[email protected]  

Thanks for your help !!  - Dave