I have a 1984 Suzuki FA50 moped that ran fine until about six months ago. One day I tried to start it, and the throttle got stuck while trying to rev the engine. It would not budge from idle. I unstuck the throttle by twisting it as hard as I could (who says brute force doesn't work?). The throttle remained "unstuck," but the moped just wasn't the same -- it would immediately shut off as soon as I applied the throttle. I let it be and saved the repair for another day.
Fast-forward four months. I decided it would be a stellar idea to create a teardown for the moped, clean the carburetor, and figure out the throttle problem. I managed two of the three (teardown is almost done, and the carb is clean), but to this day I cannot figure out what the heck is wrong with the throttle. Since it's a pretty involved piece of machinery, I created another teardown that described the stuck cable problem in greater detail. Please take a look at it here:
I would love to hear any suggestions you have on how I can fix my Suzie's throttle. I miss riding it.
+
+
== Update ==
+
I have since resolved the stuck throttle problem. After screwing with the throttle for hours, I figured out I've been inserting the cylinder off by 180 degrees.
+
I was actually about to order another throttle cable online, when I came across a schematic (which I already had in my manual). I glanced at it, and noticed the position of the cylinder in relation to the carburetor. What I found odd was that the notch (which I've seen dozens of times before) was 180 degrees rotated from how I was inserting it...
+
So I went outside, rotated the cylinder 180 degrees, and presto-blamo the entire cylinder assembly went into the carb about twice as deep as before!
+
What sucks is that I've tried the cylinder in that position before, but it didn't want to enter the carb in my previous try. I had actually rotated the cylinder multiple times, trying to insert it into the carb, and the only position that I thought worked was the one I was trying all along.
+
Finally after inserting it correctly, reassembling the throttle handle (I took it apart out of desperation), trying to get the thing started and fine-tuning it for three hours, I managed to go for a ride down the street!
+
...And then the weather turned inclement and poured rain for a week straight, rendering the moped useless for a while longer...
I have a 1984 Suzuki FA50 moped that ran fine until about six months ago. One day I tried to start it, and the throttle got stuck while trying to rev the engine. It would not budge from idle. I unstuck the throttle by twisting it as hard as I could (who says brute force doesn't work?). The throttle remained "unstuck," but the moped just wasn't the same -- it would immediately shut off as soon as I applied the throttle. I let it be and saved the repair for another day.
Fast-forward four months. I decided it would be a stellar idea to create a teardown for the moped, clean the carburetor, and figure out the throttle problem. I managed two of the three (teardown is almost done, and the carb is clean), but to this day I cannot figure out what the heck is wrong with the throttle. Since it's a pretty involved piece of machinery, I created another teardown that described the stuck cable problem in greater detail. Please take a look at it here:
http://www.ifixit.com/Teardown/Suzuki-FA50-Moped-Throttle-Cable/1577/1
I would love to hear any suggestions you have on how I can fix my Suzie's throttle. I miss riding it.