Dear friends,
Now I have chance to upload the Garelli Mosquito 39B pictures. This is 2-strokes 38CC, which is run good in the around 1950-1960. But then lost and forgotten in the garage, until now I found and try ro restore it. Probably last time before I, someone has try to restore/modification it. So, when I find it just found 2 cables came out from the magneto. But all other part (carburetor and cable, piston, engine mounting,bike frame etc in good condition).
Main problem is there is NO SPARK to ignite the sparkplug and just found 2 wires tangle from the magneto it's useless for me, leaving a question where should I get to start from. Coz I dont have too much experience on engine (esp electricity), may know the principle but the practise..NILL
I believe the first step is try to get some spark , later step to add fuel/air mixture to make this running again.
So attch is some pictures of the motobike. Originally it has no battery (accu) and ON/OFF switch. Only a cylinder compression release valve on the engine which is push to open during initial starting pedal and after gain some speed (for spark) then close the valve to start the compression. To shut off the engine, just open the valve again to leak the compression. There is spring lever to disconect the engine from tire and back to normal bike
I have conduct some test using Voltmeter set to AC measurement
1. When I measure the 2 cables (vice versa between those 2) and pedaling, it oscillate between 40-50V AC, more faster pedalling then bigger the reading
2. When 1 cables measure (vice versa between those 2) and 1 terminmal attch to body, pedalling, just gain 7-10V.
3. Do you think this is a AC Magneto generator ? Trying to measure 2 cables using DC measurement but can not get the reading.
4. Actually what current is enter the sparkplug, AC or DC current ?
That's it I'm dead blind...
Pls kindly give your opinion, if u may having this situation
. I heard there is a chance to modification using CDI (not to use platina again) to increase the AC voltage. What if just feed those 50V AC to CDI unit to generate spark? Is it possible just plug those 2 cables to simple CDI unit ?
Thak you guys sorry for my bad English
Rgds,
4nn4
Now I have chance to upload the Garelli Mosquito 39B pictures. This is 2-strokes 38CC, which is run good in the around 1950-1960. But then lost and forgotten in the garage, until now I found and try ro restore it. Probably last time before I, someone has try to restore/modification it. So, when I find it just found 2 cables came out from the magneto. But all other part (carburetor and cable, piston, engine mounting,bike frame etc in good condition).
Main problem is there is NO SPARK to ignite the sparkplug and just found 2 wires tangle from the magneto it's useless for me, leaving a question where should I get to start from. Coz I dont have too much experience on engine (esp electricity), may know the principle but the practise..NILL
I believe the first step is try to get some spark , later step to add fuel/air mixture to make this running again.
So attch is some pictures of the motobike. Originally it has no battery (accu) and ON/OFF switch. Only a cylinder compression release valve on the engine which is push to open during initial starting pedal and after gain some speed (for spark) then close the valve to start the compression. To shut off the engine, just open the valve again to leak the compression. There is spring lever to disconect the engine from tire and back to normal bike
I have conduct some test using Voltmeter set to AC measurement
1. When I measure the 2 cables (vice versa between those 2) and pedaling, it oscillate between 40-50V AC, more faster pedalling then bigger the reading
2. When 1 cables measure (vice versa between those 2) and 1 terminmal attch to body, pedalling, just gain 7-10V.
3. Do you think this is a AC Magneto generator ? Trying to measure 2 cables using DC measurement but can not get the reading.
4. Actually what current is enter the sparkplug, AC or DC current ?
That's it I'm dead blind...
Pls kindly give your opinion, if u may having this situation
. I heard there is a chance to modification using CDI (not to use platina again) to increase the AC voltage. What if just feed those 50V AC to CDI unit to generate spark? Is it possible just plug those 2 cables to simple CDI unit ?Thak you guys sorry for my bad English
Rgds,
4nn4
