Is it the coil?

[oldenoughtoknowbetter]

I have a recently acquired 1996 PD Classic with low (7000) miles. Took it out for a 60 - 70 mile run today and running fine. Then it started to run rough at low revs. Tick-over's dropped from 1100 to around an erratic 700 RPM. First impressions were that it'd dropped a valve but it seems to be much smoother and pick up well at higher revs. I have a compression tester so can have a look at that if needs be. And so I'm thinking coil. The bike's absolutely standard. Any ideas?

 

[Rob Farmer]

It's probably just crap in the carbs. Drop the float bowls and have a look.

 

[oldenoughtoknowbetter]

Thanks. Just tried that. Not even a speck of dirt in the float bowls.

 

[dipper]

same problem R100 gs, Carbs as clean as a whistle, going to look at the coil, leads etc. next. just a quick one are the carbs easy to balance?

 

[oldenoughtoknowbetter]

I also have a R100RT with around 200,000 on the clock. The Bings on the RT have take-off points for vacuum tubes and are a piece of cake to balance. But the PD doesn't seem to have those take off points so again, any suggestions how to balance these appreciated also.

 

[Rob Farmer]

The GS carbs have the vacuum take offs underneath the carb next to the pilot mixture screws. Your RT must be a heavy flywheel machine to have the vacuum take offs on the side of the carbs.

 

[Ogmios]

i'd check all the above and change the plugs, HT caps and leads, they're cheap enough and it eliminates them.
- but also maybe check the choke gaskets too.

Good Luck.

 

[dipper]

Choke Gasket !!! I'm going to get a manual, and thanks

 

[BillN]

oldenoughtoknowbetter and Dipper

You need to search the Airhead Forum - lots of info around and about this and these subjects.



It is a matter of elimination and regular maintenance