Top Speed, Tach and false neutrals

[drewboid]

Not sure which version of Bing carbs you have - the ones with a separate metal disk on top are vulnerable to air leaks at the edge of the disk. My R75/6 would not go over 75 and the last 1/4 of the throttle gave no apparent increase in power. A little gel epoxy around the edge of the disks sealed the air leaks and restored performance. A torn diaphram in the carb can also cause a similar problem.  YMMV

[steve hawkins]

Actually, we do have a sprung sriveshaft on the R65 that acts like a cushion drive.  So that the shock loading of the transmissiion from either direction is reduced.  

cheers

Steve H

[Justin B.]

Steve, is that on all or just the post '80 bikes?

[mikethebike]

Actually, we do have a sprung sriveshaft on the R65 that acts like a cushion drive.  So that the shock loading of the transmissiion from either direction is reduced.  

cheers

Steve H

Sorry! My mistake.

[awaffa2003]

With my riding style, i don't think there is anyway around this. I have to ride slower, or at least accelerate slower cuz preloading works, but it takes such a long time! I shift so fast sometimes that i'm bringing up my fromt wheel shifting into second. But i'll work it out thatnks for the comments. and the cush drive IS on the later bikes, somewhere around 80 i believe.

[Rob Valdez 79 R65]

Steve, is that on all or just the post '80 bikes?

It was one (of many) innovation(s) introduced with the R45/R65 in 1978.


Leave us not forget the spring/ramp dampener on the input shaft of the transmission, as well. image

[willr65]

That's gotta be a picture of a pre-81 R65 gear assembly Rob!
This is what the guts of my 1982 vintage gearbox looks like!   :-?

[Rob Valdez 79 R65]

That's gotta be a picture of a pre-81 R65 gear assembly Rob!
This is what the guts of my 1982 vintage gearbox looks like!   :-?

It is from an early transmission, but it was the dampener that I was wanting to show.

[ipanemaguy]

Steve,
I trust you are the 65-er in the UK with the good looking red framed bike.  In the hopes that you are indeed that person, I ask you to give some details of the comment about dual-pot calipers from later bikes being usable on the r65.  Which specific calipers are best suited, alternatives, what shimming is necessary??  If you have pictures drop me a message at;
xkp8rt9@yahoo.com

regards.

[steve hawkins]

My bike started life as a 1979 R65 with a pair of silver ATE twin pot calipers (one pot each side of the caliper, working in opposition to each other).

However they needed some serious work so I swapped them for a pair of used Brembo twin pot calipers from a post 81 R65.  However I did not change my master cylinder to the later type, so they were a bit firm and lacked feel, but were powerful.

Recently I have gone from a dual disc setup to a single disc using one of the Brembo's and an appropriate post 81 R65 master cylinder.  The plan being to upgrade the single disc to a full float like Rob Valdez.  I find that I have gained feel and progression, reduced unsprung weight, but lost outright power.  This is not an issue as I do not have a large fairing, generally do not carry luggage and do not carry a pillion.

The bottom line is, always change the master cylinder to match the brakes!  Unless you are very lucky indeed.

cheers