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I also ordered a couple of 13 11 1 338 134 springs as per Snowbum's article, they fit perfectly in the carbs and made the bike idle marvelously but it was absolutely impossible to rev the bike at all without it flooding and stalling. Has anyone else had this problem? I'm thinking maybe the springs ...

Not knowing the details of your points booster, I can't really comment but, if it's essentially substituting a semiconductor switch for the points (no matter how triggered)... as you say, the energy dissipated in the igniton system is dependant on the coils rather than the switching method so your ...

Hmmm..Your point seems a valid but.. Is a dead short worse than a totally fouled plug? Good point, a dead short is not worse than a fouled plug as an open circuit will cause the coil to generate it's highest possible HT voltage which stresses the coil insulation and may lead to damage on electronic...

I would certainly not short the plug leads on electronic ignition although I've done it on points ignition including with my kit built ignition amplifier in place after noting that there are several blocking diodes in the electronic circuit to protect against a back emf and there is a condenser to a...

No I don't believe it will work at least not while maintaining the same cam timings. As you say type 248 R45 and R65 cams have the same basic timing as type 247 cams so the the standard 35hp R45 cam is a 308 and the 27hp R45 cam is a 284 and those 284's by the way are very rare outside of mainland E...

There may be some corrosion. I'd peel back the rubber and squirt in some WD-40 then let it soak.

Thanks for that ME, I had not noticed. Maybe we will have to require a login to access all forums then. For a long time it's been that one can view the post '70 Airheads and other forums without having to login. But due to the denial of service problems we've been having, perhaps we will have to lo...

Have checked resistance in the coils with the battery disconnected. (LH primary gives 1.5, RH primary 1.6, LH secondary 6.51k, RH secondary 6.72) the coils look like they could be original.. These numbers don't appear to align with anything I can find online - any thoughts? (The resistance of the m...

Yes BMW saying zero clearance but free moving isn't all that helpful especially as I found that the pushrods needed to be removed to check free moving over the full arc. The measurement I did was to check the gap with the a 1.5 thou feeler gauge which wouldn't quite fit so I assumed a 1 thou gap and...

Tom H Ca wrote: ↑Sat Aug 16, 2025 9:20 am My '73 R75/5's are aprox. 6 1/2". I even matched them up to a 7" and they are smaller.

Tom

Same size as the R65 headlamp which can be used to upgrade a/5 to a H4 halogen bulb.