Opposite Spark Plugs Don't fire

[ryonker]

I have a 79 Suzuki GS750L. Two of the cylinders and respective plugs aren't firing (opposite sides of bike). We couldn't see a spark and the plugs/cables were relatively cool. The other two work just fine.

Is this likely the starter coil? I know nothing about motorcycle mechanics.

[Nessism]

Is the bikes maintaince up to date? Points and condenser in good shape and properly adjusted? Plugs in good shape? If you don't know the answer to these questions, get a manual and do all the maintaince first. BassCliff has a manual for your bike - 8 valve 750.

Good luck.

http://members.dslextreme.com/users/bikecliff/

[ryonker]

Assuming good maintenance

Assuming good bike maintenance, what are you thoughts?

[Nessism]

Assuming good bike maintenance, what are you thoughts?

My thoughts are that you should verify the condition of the ignition system elements - points, condensers, plugs. Next step is check for proper voltage at the coils and resistance of the plug caps. Don't assume anything. To Measure is to Know.

[ryonker]

Thanks!!!!

I will do this!