Thursday, June 28, 2012

Success



So I decided to take a couple of days off and enjoy what was supposed to be a couple of days of clear winter skies in what has been about a month or so of miserable rain and wind, I ordered a new set of points and a new condensor along with a couple of idle jets to try out to see if I could get to the bottom of this starting and idling issue. When I got to the shed with new parts in hand the promised weather had not arrived, so I set about changing these bits over. Flywheel off and I took the top off the wiring junction box so I could take the stator plate off and low and behold this is what I found, in the top picture you can see that the screw securing the black earth wires had vibrated itself off completely and was sitting in the back of the box, also the screw holding the green "hot" wires was as loose as it could be before it too fell out, that explains a lot....My wiring doesn't look that flash in that picture but I've done it myself and I know its solid and functional.
I decided to change out the points and condensor anyway and perhaps keep the old ones as emergency spares. In the second photo you can see the expert wiring connection from the condersor unit to the points, nice work Planet Vespa.
The third photo is the new and old points units, you can see that the bottom one has a slightly bent stem where the fixed point half is located next to the wooden cam thingy, this meant that it could only open a little way which was why I found it hard to clean the points in the first place.
With the new units in place soldered and screwed, I put the flywheel and everything else back on and gave it a kick. Third go she sprang to life and I let her warm up for a minute or so, still having to crack the throttle to keep it running, once it was warm it idled, a bit rough but I wanted to take it for a run before I adjusted the idle. I rode into town and down the same hill I had to bump start it a week ago and she began to burp, fart, backfire so I turned around so I could get back to the top of the hill under her own steam, it wasn't pretty and she gave up the ghost at the top of the hill. Now I'm no soldering guru, in fact I had no confidence in my soldering on the ctop of the condensor at all, since it came off twice before it stuck, in my wisdom I put some electrical tape over my solder with the thought that if it did come loose I could limp home, I'm not even sure what it actually does other than " condense" the spark before it heads out to the coil and then the plug, anyway some reading to do there.
It turns out that the moving part of the points was catching on the tape so through the hole in the flywheel I cut and pulled the tape off and bang she started first kick and ran well, phew and the solder was holding tight, double phew.
I adjusted the idle and off I went, she was like a new bike, the sun came out and I enjoyed a lovely 80km ride. On day two she started second kick but because of the cold took a few goes to stay running, no throttle involved, she idled and warmed up by itself. I refueled and had another trouble free 45km ride, I had to adjust the idle again but that was all.
I just have one thing I need to do and that is to figure out how to gap the points, the gap is bigger than it should be and the only information on setting the gap I can find is for a different points set up, shouldn't be a problem, theres a ton of info out there. I'm pretty happy to have her running well again, now I'm not touching a thing.

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