New Member

[Davie_Hall]

Hi all, been looking on here for a couple of weeks. I dont have an r65 but I do have an r45, which will either become an r65 through time or be replaced by an r65 so the 45 can be turned into an r48, i.e an r45 withan 800 engine fitted.
will be picking your collective brains over the months for best mods
Hello once agian
Davie

[Bob_Roller]

Welcome Davie, ask all the questions you want .

I think we only have two other members here with R45's, not a very common bike here in North America .

[Davie_Hall]

They are not very common over here either, mine lives alongside a k1200lt and an r1100gs, and its the most used,its pathetically slow BUT I smile every time I ride it. Its just like when you first started to ride, you always wanted more speed.

[Bob_Roller]

We've got a member here (username Mick) from Kinghorn, Fife, Scotland, that rode his '81 R65 round the world, (except for the watery areas) .

Not a very prolific poster on the forum .

http://mickrtw.blogspot.com/

[Lucky_Lou]

Welcome Davie ...Kelso Kelso do you go to the Annual Country music bash there?  friends of mine keep inviting me up there , to date ive resisted but if theres a Airhead to be visited that may swing it....Barry is your man for the r45,s no doubt he will chip in soon.
This may be of interest....given the other bikes in your stable
http://www.gabfesters.org.uk/

Lou

[Barry]

Welcome Davie,

Good to see another R45 owner.  R45's are identical to R65's in every respect except for cylinder bore size, carb size, final drive ratio and speedo ratio so most spares are interchangeable.

[montmil]

Looking forward to seeing some photos of your R45, Davie, and your other rides, too. Post some snaps when you can. We love pictures and simple motorcycles!

Monte

[nhmaf]

Welcome aboard, and with a "rara avis" no less !

We have one member here in the US (DeeG) who has an R45, and I think one fellow who seldom posts anymore also somewhere on the upper left coast..

[montmil]

...We have one member here in the US (DeeG) who has an R45, and I think one fellow who seldom posts anymore also somewhere on the upper left coast..

Oh, Mike...
Expect you'll be hearing from our member-buddy Barry very shortly; just as soon as he parks his R45.

Monte

[Barry]

Monte,

He already did  a few posts up.

... and how did you know I'd just parked the R45 a few minutes ago after a cold wet ride home from work. I can't say it was much fun and not what was forecast at all but that wasn't the bikes fault.

... and now I'll have to clean it again. :-/

[Davie_Hall]

Hi Barry just wondered how optimistic is you speedo mine seens a long way out at 70 sat nav says about 58

[Barry]

Hi Davie

Airhead speedo's like most others are reckoned to be optimistic except the North American 85 MPH version which is supposed to be close to spot on.

Truth is I have never checked mine other than to observe RPM vs MPH at different speeds according to the chart below. On that basis and if the rev counter is accurate (a big IF perhaps) my speedo is not too bad reading 5 mph high at 60 MPH.

Airhead speedos are matched to the final drive ratio fitted to the bike so you might want to check you have the correct one fitted. On the lower part of the speedo face you should see W1441 which is correct for a 3.89:1 final drive ratio. I read somewhere that the W means 'Wegsteckenzahl' ('travel-distance-index-number'), which equals the number of rotations for 1 mile.

BTW I calculated that if you multiply your final drive ratio by 370 it should give you the correct speedo ratio. Can anyone check their speedo and confirm if I am close with that figure.

[Davie_Hall]

Hi Barry thanks for the chart , I spent ages looking for one but never found one. Now looking at the revs=speed,my speedo doesnt seem so bad, havind said that a while back the mileage & trip on mine started working again but at a greatly increased rate i.e going to work is 20 miles and the mileage would increase by maybe 60 miles, but as the mileage increases this has lessened,and now looking at your chart at 4000rpm my speedo reads 60mph whereas when I got the bike it was nearer 70 so maybe this has been the problem?
Out of curiosity where are you based?

[Barry]

The chart is something I knocked up on an Excel spreadsheet. It's all simple maths with the only potential error being the tyre fitted. I measured the exact rolling circumference of a standard 4.00 X 18


I'm near Macclesfield in Cheshire Davie.

I confess I had to look up Kelso on Google maps to see you are up in the Scottish Borders.

[Rob Valdez 79 R65]

They are not very common over here either, mine lives alongside a k1200lt and an r1100gs, and its the most used,its pathetically slow BUT I smile every time I ride it. Its just like when you first started to ride, you always wanted more speed.

No doubt you have heard "It's more fun to ride a slow bike fast, than a fast bike slow."