1978 Gs750e

[martinhelen]

I have a 1978 GS750E. I recently had a complete rebuild done on the engine, and transmission, I also had new coil packs put on it. Carbs have been rebuilt also. I'm thinking about out electronic ignition on it. My current problem is I have a miss in it. It is popping back through the exhaust. (Sitting on the bike it is the right side) I can't seem to get it figured out. Any suggestions. I have 700 miles on the bike since rebuild. Thanks for any help

 

[Guest]

How are your compression numbers? Valve clearance? Is the exhaust sealed with new gaskets? Timing? New o-rings on the intake boots engine side? Points new and flat with proper clearance?

 

[martinhelen]

Compression is good, valve clearance is good, all new gaskets and o-rings. I am inclined to think that elecronic ignition is probably the way to go. Points are a pain. I've got way too much time and $$ in this bike to have it miss like this. I do a lot of the work myself but the engine rebuild was done at a shop that specialises in restoration of old bikes.

 

[frosty5011]

The points are very easy to set. There's several threads already in the tech section on how to do so......look for one typed up by Earlfor.

Also, if you are sure your points are good (I'd invest in a new set, they're about $8 each) and properly adjusted, you could also have bad condensor(s). You can ride thousands of miles without having to check/re-adjust the points.

 

[martinhelen]

Already put new points and condensors on it when the engine was rebuilt 700 miles ago. I really wanted to keep this bike as original as possible but I think I'll just do away with the points and go w/ electronic ignition. I've had this bike 4 years now and it seems like I'm forever replacing the points and condensors.