Okay so the 1978 gs400 ran well enough when I bought it. But when I got it home I started to have problems. As of now it is running on one cylinder all the time with the second kicking in momentarily ever few seconds. Under a load it will only run on one cylinder. I put in new plugs and points and set the static time per the manual. I cleaned the carbs twice, the second time they soaked over night. I have swapped the coils/ condensers from side to side and cleaned a bunch of grounds. The thing is that the running cylinder have swapped sides a few times. Never while running. It just starts and runs on the other side. Ideas?
-
June 2, 2010 10:29 a.m. snipes Reader
-
June 2, 2010 10:41 a.m. Woody SuperDork
Clean all the electrical connectors in the ignition and all contacts inside the fuse box.
-
June 2, 2010 11:01 a.m. Huh New Reader
Woody wrote:
Clean all the electrical connectors and all contacts inside the fuse box.
+1
-
June 2, 2010 12:23 p.m. 44Dwarf HalfDork
Seen this before. It is likely a corroded ign wire. the plug ends should unsrew from the wire then cut the wire back about 1/4 inch and re-thread the cap back on. you should do the coil ends too. The coil ends are likely one of two Styles. the nicer kind have a plastic nut over a rubber Farrell and the wire just pushes on to a pin inside the coil. loosen the nut slide it back pull the wire out cut it back and push it in the hole and reinstall. the other type has a plastic clip with a tapered plastic fitting. use a small screw driver to lift the latch and pull out the clip careful they break easy.
Most bike stores will have a roll of ign wire on the self its real wire not carbon fiber core stuff like cars.
44
-
June 2, 2010 1:05 p.m. snipes Reader
Thanks guys. I will try these tonight.
-
June 2, 2010 9:14 p.m. snipes Reader
44Dwarf wrote:
Seen this before. It is likely a corroded ign wire. the plug ends should unsrew from the wire then cut the wire back about 1/4 inch and re-thread the cap back on. you should do the coil ends too. The coil ends are likely one of two Styles. the nicer kind have a plastic nut over a rubber Farrell and the wire just pushes on to a pin inside the coil. loosen the nut slide it back pull the wire out cut it back and push it in the hole and reinstall. the other type has a plastic clip with a tapered plastic fitting. use a small screw driver to lift the latch and pull out the clip careful they break easy.
Most bike stores will have a roll of ign wire on the self its real wire not carbon fiber core stuff like cars.
44
Worked berkeleying great!
-
June 2, 2010 9:42 p.m. BoxheadTim Dork
It stopped running on both cylinders now?
Congrats!
-
June 4, 2010 8:16 a.m. snipes Reader
Woody and Huh,
I went through and cleaned the all the plugs the best I could. And it is running even better now. But do you have any tips on cleaning the inside hole of the bullet plugs? I am thinking a tiny pipe cleaning brush.
