Search found 1210 matches

by Rob Frankham
Tue Nov 04, 2025 5:56 am
Forum: Post 1970 Airheads
Topic: E5/E10 Petrol
Replies: 11
Views: 9754

Re: E5/E10 Petrol

I think it's fair to say that, to get the best results from either type of fuel, the engine needs to be set up to run on that type. This is possible why switching from one to the other without re-tuning will result in larger than expected changes in economy and performance.

Rob
by Rob Frankham
Wed Oct 29, 2025 6:23 am
Forum: Post 1970 Airheads
Topic: Got a "tiny" charging problem...
Replies: 28
Views: 7224

Re: Got a "tiny" charging problem...

Just one comment... The voltage at the battery terminals should read around 14 volts with the engine running at over 3000rpm. It may take a while to achieve that if the battery is low to start with but, if it never gets to that level, there could be another issue. I wouldn't be particularly worried ...
by Rob Frankham
Tue Oct 21, 2025 7:42 am
Forum: Post 1970 Airheads
Topic: Got a "tiny" charging problem...
Replies: 28
Views: 7224

Re: Got a "tiny" charging problem...

My apologies, read the first page and thought it was a new post.
by Rob Frankham
Mon Oct 20, 2025 4:22 pm
Forum: Post 1970 Airheads
Topic: Got a "tiny" charging problem...
Replies: 28
Views: 7224

Re: Got a "tiny" charging problem...

In the first instance, you really do need to sort out why the charge lamp isn't lighting. The tests you have done suggest that the problem is in the wiring or conductors between the bulb and the voltage regulator/diode board (i.e. the blue wire) or between the bulb and the positive supply. You don't...
by Rob Frankham
Mon Oct 13, 2025 4:12 am
Forum: Post 1970 Airheads
Topic: Mono vs twin shock pannier frame fitting?
Replies: 4
Views: 4276

Re: Mono vs twin shock pannier frame fitting?

The Monoshock frames and the twinshock pannier frames are different and won't fit... certainly not in a 'bolt on' sense. To add to the mix, frames for the: a) Short wheelbase /5 series, b) The R45/R65 series, c) The GS/LS series, d) The 'R' series also won't fit. You need to source a set from a twin...
by Rob Frankham
Sat Oct 11, 2025 5:32 am
Forum: Post 1970 Airheads
Topic: Recommended garage or mechanic .
Replies: 2
Views: 4697

Re: Recommended garage or mechanic .

Kurt in S.A. wrote: Fri Oct 10, 2025 11:27 am Welcome! I googled that city name and find one in New York and the United Kingdom, even Canada!!

Kurt
Not to mention Australia...

Rob
by Rob Frankham
Sat Oct 11, 2025 5:24 am
Forum: Post 1970 Airheads
Topic: Dead R65
Replies: 4
Views: 5041

Re: Dead R65

A bit late now... but for what it's worth, the arrangement described above (i.e. all of the current passing through the starter relay) doesn't apply to the R45/R65 models, the R80LS or the monoshock models. On these models, the battery power to the starter relay is fed via a spur from the main power...
by Rob Frankham
Sun Sep 28, 2025 5:57 am
Forum: Post 1970 Airheads
Topic: E5/E10 Petrol
Replies: 11
Views: 9754

Re: E5/E10 Petrol

I've run on E10 apart from a few 'test' fill ups with E5 since it first came in. Can't say that I've noticed any real performance difference apart from a slight reduction in fuel consumption (less than 10%) which is what you would expect. Also no issues with degradation of plastics so far. I do wond...
by Rob Frankham
Fri Sep 26, 2025 4:13 am
Forum: Post 1970 Airheads
Topic: 1970 R75/5 chassis wiring harness question
Replies: 7
Views: 16138

Re: 1970 R75/5 chassis wiring harness question

This has been pretty well covered by gspd but I can't resist the invitation to elaborate... :roll: The coil of the solenoid has a very low electrical resistance... it has to have so it can carry enough current to pull in the solenoid. This means that if you put a bulb in series with a twelve volt ba...
by Rob Frankham
Thu Sep 25, 2025 3:53 am
Forum: Post 1970 Airheads
Topic: R75/6 LED turn signals. Dash light won’t flash
Replies: 11
Views: 13129

Re: R75/6 LED turn signals. Dash light won’t flash

They (diodes) aren't rated in watts and you can't infer a wattage by multiplying amps by volts since the two ratings refer to different conditions. That's why I asked what specific diode you (Rob) would recommend for this application. The few times I've needed diodes for a project, I would simply e...