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OK... 1) 13.3 volts is too low for an airhead charging circuit with a fully charged battery but, as has already been said, if the battery is low (or in poor condition) it can pull the charging voltage below the optimum. FWIW, the optimum should be regarded as between 13.75 volts and 14.2 volts. Adv...

To get 13.3 Volts means the charging system is doing something. Only just Just off idle you wouldn't expect to see more than 13.3 volts so when you say off idle what revs are we talking about and does the voltage increase at higher revs to 14.0 Volts or something near ? That’s the problem, the volt...

To get 13.3 Volts means the charging system is doing something. Only just Just off idle you wouldn't expect to see more than 13.3 volts so when you say off idle what revs are we talking about and does the voltage increase at higher revs to 14.0 Volts or something near ? That’s the problem, the volt...

What model/year bike are you talking about? You should probably measure the resistance across the slip rings on the rotor. Carefully life the brushes off and slip in a business card. Measure ring to ring. The bike is a ‘83 R100RS, with the brushes lifted and a probe of the multimeter on each ring, ...

Hi everyone, I have a on-dash voltmeter and I noticed that it showed quite a low voltage when off-idle (around 13-13.3v), knowing that these voltmeters aren’t always accurate, I double checked with a multimeter at the battery poles and shows the same low voltage So, first thing first since it’s the ...

I was lucky enough to find a set of perfectly chromed NOS headers for my airhead at a very good price, but the crossover pipes are missing, can anybody give me the precise lengths of both pipes so I’ll try to make them?

Thanks in advance, Leo

So, I noticed that my alternator system is not charging the battery at all, still have to properly diagnose the problem but before doing any testing I wanted to ask about the necessity of a generator light, because I remember reading about the fact that not having one would make the alternator NOT c...

Well... rigid lines are intrinsically more - well - rigid really than flexible lines so they are less likely to expand under the pressure of braking but, bearing in mind the lengths of hose involved on an airhead, I can't see that it'll make any noticeable difference. Any reason for moving away fro...

Title is pretty self explanatory, I was looking forward to some suggestions/advices that anyone could give me about said swap, and if it's doable or wether it has any sense doing it

Also, what's the thread size of the rear brake master cylinder where it connects to the brake hose?

A '83 bike will have two crossovers. They are pretty much interchangeable but you can't mix them (obviously). There will be a slight performance difference but not really noticeable. Rob Found a nice pair of chrome NOS dual crossover headers, now I just have to fabricate the crossover pipes but tha...