R65 Mod's

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Paul Hayward
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R65 Mod's

Postby Paul Hayward » Mon Jul 19, 2021 3:25 pm

Hello All,
I have an R65; currently in bits; it'll be going back together soon, but, there are changes I would like to make.
So, I would like to call upon your collective knowledge.
Firstly, is there a 19" front wheel, I could fit.
Is there a larger fuel tank I could fit.
And finally, is there a longer swinging arm/driveshaft that could be installed with no machining, and the likes.
I'm sure, someone, somewhere, will of thought along the same lines, so, there may be the wisdom, and parts, out there, to point me in the right direction.
Many thanks in advance,

Paul.

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george baker
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Re: R65 Mod's

Postby george baker » Mon Jul 19, 2021 10:32 pm

Hi
welcome to the forum, what year is the bike?
George
Member 21, R100R, and an under used K75

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Rob Frankhamr
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Re: R65 Mod's

Postby Rob Frankhamr » Tue Jul 20, 2021 12:46 am

Hi Paul,

You would probably get more advice if you post in the 'Airhead Q & A's ' forum page. This page is dedicated to pre 1969 machines. Not being funny but that's where the R65 users hang out and where they are likely to see your question. If you ask the moderator, he can move the post.

That being said, I'll echo Georges query... the post '85 R65 is a very different animal to the earlier models... it would also be useful to know what you are trying to achieve with the mods you suggest.

Rob
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Mjolinor
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Re: R65 Mod's

Postby Mjolinor » Tue Jul 20, 2021 8:01 am

Hi Paul,

You would probably get more advice if you post in the 'Airhead Q & A's ' forum page. This page is dedicated to pre 1969 machines. Not being funny but that's where the R65 users hang out and where they are likely to see your question. If you ask the moderator, he can move the post.

That being said, I'll echo Georges query... the post '85 R65 is a very different animal to the earlier models... it would also be useful to know what you are trying to achieve with the mods you suggest.

Rob
Exactly what I did on my first post having no idea of the difference at that time. :)

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windmill john
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Re: R65 Mod's

Postby windmill john » Wed Jul 21, 2021 3:45 pm

I can answer your first bit. I fitted an R60/6 front wheel to my R65.
This of course changed it to drum brake, so needed a different brake lever, handlebar bracket, cable etc.
Also, I needed to get one side of the axle machined down slightly to fit the R65 leg. Only one side needed turing down.
http://www.kittos.co.uk
Best roads: 623 Burgos to Santander. A back road to Metz; can't remember which!
Tweety Pie, my F650GS
Si, my CX500
Too many bikes have come and gone, trying to be sensible now!

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george baker
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Re: R65 Mod's

Postby george baker » Wed Jul 21, 2021 6:17 pm

Hi Paul
where are you based?
George
Member 21, R100R, and an under used K75

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Rob Frankhamr
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Re: R65 Mod's

Postby Rob Frankhamr » Wed Jul 21, 2021 6:49 pm

I can answer your first bit. I fitted an R60/6 front wheel to my R65.
This of course changed it to drum brake, so needed a different brake lever, handlebar bracket, cable etc.
Also, I needed to get one side of the axle machined down slightly to fit the R65 leg. Only one side needed turing down.
Only valid if it's a pre 1984 R65. 85 and later bikes were the same as the contemporary R80/R00 models as far as the frame and suspension goes.

Rob
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windmill john
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Re: R65 Mod's

Postby windmill john » Thu Jul 22, 2021 5:20 pm

Yes, mine was a 1980 model, but sorting out an axle shouldn’t be too much of a worry.
http://www.kittos.co.uk
Best roads: 623 Burgos to Santander. A back road to Metz; can't remember which!
Tweety Pie, my F650GS
Si, my CX500
Too many bikes have come and gone, trying to be sensible now!

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Rob Frankhamr
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Re: R65 Mod's

Postby Rob Frankhamr » Thu Jul 22, 2021 10:07 pm

Yes, mine was a 1980 model, but sorting out an axle shouldn’t be too much of a worry.
The front axle on a Mono is much bigger diameter than any twinshock... I think you'd end up sleeving the axle housings in the forks. Not sure I like that idea much...

Rob
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windmill john
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Re: R65 Mod's

Postby windmill john » Fri Jul 23, 2021 7:53 am

Luckily, with the R60 axle, if I recall, the only mod was reducing one side to 17mm, just where it passed through the left leg. In other words, the diameter was correct for the first leg, so very little machining. An example of a time when I would have liked a lathe, but I took it to an engineer.

Can’t see any downsides to sleeving, I would think the axle diameter is still sufficient. I imagine that would have cost more and I’d like a pedantic engineer to do it.
http://www.kittos.co.uk
Best roads: 623 Burgos to Santander. A back road to Metz; can't remember which!
Tweety Pie, my F650GS
Si, my CX500
Too many bikes have come and gone, trying to be sensible now!

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Rob Frankhamr
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Joined: Mon Jul 25, 2005 6:33 pm
Country of Residence: Scotland
Location: Kinloch Rannoch, Perthshire

Re: R65 Mod's

Postby Rob Frankhamr » Fri Jul 23, 2021 9:34 am

Luckily, with the R60 axle, if I recall, the only mod was reducing one side to 17mm, just where it passed through the left leg. In other words, the diameter was correct for the first leg, so very little machining. An example of a time when I would have liked a lathe, but I took it to an engineer.

Can’t see any downsides to sleeving, I would think the axle diameter is still sufficient. I imagine that would have cost more and I’d like a pedantic engineer to do it.
My Issue with sleeving would be that the pinch bolts at the bottom of the fork legs would pinch on the sleeves not on the axle which would mean that the axle wouldn't be secured and the security the bolts represent would be lost. You could, of course, split the sleeve but then you would have the added issue of making the split in the sleeve line up with the split in the fork leg otherwise it probably wouldn't close up properly... and then you have the issue of whether the pinch bolts in the alloy Mono forks would be sufficient to close up the (presumably) steel sleeve anyway...

Then, of course, there's brakes. The discs on a twinshock wheel won't work with a mono calipers and there's not a great deal you can do about that. In all, the whole thing is too complicated.

The obvious way to fit a 19" wheel to a mono would be to replace the whole front end up to and including the yokes with one from a twinshock model... but then you'd lose the admittedly better front suspension.

In any case, we still don't know the year of the R65 under discussion here (or even if the poster has ever looked at the thread after posting) so it's all getting a bit off topic really.

Rob
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Mjolinor
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Re: R65 Mod's

Postby Mjolinor » Fri Jul 23, 2021 9:38 am

Hmm, well he aint been back since I posted about the wrong forum thing. Things like that can make a man paranoid, are my posts really that bad?

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Rob Frankhamr
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Re: R65 Mod's

Postby Rob Frankhamr » Fri Jul 23, 2021 9:41 am

Hmm, well he aint been back since I posted about the wrong forum thing. Things like that can make a man paranoid, are my posts really that bad?


No, I don't think any of us have been anything other than friendly and helpful. Who knows... Some people find the answer el;sewhere and never bother to check back.

Rob
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windmill john
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Re: R65 Mod's

Postby windmill john » Sat Jul 24, 2021 12:47 pm

Come on Rob, let’s get back to the point. Are Mjolinor’s posts that bad…. Common decency prevents me from….. :grin:
http://www.kittos.co.uk
Best roads: 623 Burgos to Santander. A back road to Metz; can't remember which!
Tweety Pie, my F650GS
Si, my CX500
Too many bikes have come and gone, trying to be sensible now!

Mjolinor
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Posts: 3489
Joined: Tue Jun 12, 2018 9:38 pm
Country of Residence: United Kingdom
Location: Burnley

Re: R65 Mod's

Postby Mjolinor » Sat Jul 24, 2021 1:21 pm

Come on Rob, let’s get back to the point. Are Mjolinor’s posts that bad…. Common decency prevents me from….. :grin:
I'm going down the garden to eat worms.

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george baker
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Re: R65 Mod's

Postby george baker » Sat Jul 24, 2021 3:37 pm

Hi
Worms? Luxury, in my day we had to share ONE among the lot of us
George
Member 21, R100R, and an under used K75


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