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Author Topic: Time for a change - Perhaps a bit of 'Bobbery'  (Read 7825 times)

Offline steve hawkins

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #30 on: March 13, 2013, 03:35:25 AM »
I only wish my execution could have been more like this though

http://www.pipeburn.com/home/2013/2/25/la-coronas-81-bmw-r100rs-004.html

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Steve Hawkins R100 (that wants to be an R65)

Offline steve hawkins

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #31 on: March 18, 2013, 03:58:51 AM »
Here is a better picture, on arrival to work this cold and frosty morning.  Its probably quicker and warmer to get on the bike and cross town than it would be to scrape all the windows in the camper van and sit in it for 10 mins waiting for the heater to warm her up.



Cheers

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Steve Hawkins R100 (that wants to be an R65)

Offline steve hawkins

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #32 on: April 04, 2013, 02:51:50 AM »
Last night I tried a couple of different handlebars.  I was unhappy with the look of the RT bars I have currently fitted, although I had gotten used to them ergonomically.  And the bike had become a slow steerer as a result of no longer being able to fully account for the big 19 inch front wheel, i.e the fork stantion can now only poke through the top of the yoke by a 1/4 inch instead of a 1/2 inch

A mate of mine had a set of Renthals and a standard handlebar from a Honda Hornet, which I supposed were not too far off the look of the standard BMW Euro Bars.

However, although I could fit the Honda bars, they were too low, to far forward and not really wide enough - although everything could be made to fit - it just looks crowded.

I looked to the Renthals, which were very slightly higher and had a more rearward sweep.  Although they were black and not the more desirable chrome, they were free.  However I could not fit them as they interfered with the tops of the fork stantions - which if you remember poke up through my top yoke already by not enough to counter the fact that I am running a bigger 19 inch wheel at the front....Hoisted by my own Petard!  Again.

Thats the trouble with modifying, one change always leads to another and another.

Soooo, I have to find a way to either lower the front a bit, or find some risers.

Risers seem to be inordinately expensive and far too much rise for what I need - i.e. 1cm or so.  I could try a set of R80/100 handlebar risers that are fitted as standard to the larger airheads, to modify, but Motobins and the like want silly money for them.

Putting an 18 inch wheel in the front would be another expensive option - as I would have to rebuild the front wheel with a new rim and new spokes.

Shorter or softer fork springs?  I do not want to cut the current springs.  Its gash - not the proper engineering solution.  Nor do I want to go down the road of trying to source something shorter.  But I seem to recall, when I did this bike up in its Cafe Racer guise I fitted new springs in the fork legs, and I might well have fitted the progressively wound heavy duty type, I can sometimes feel them rebounding witha slight thunk when going over bouncy roads.... I might still have the originals kicking around somewhere....Or am I thinking of the R100 set I recently tripped over.....?

...Obviously more thought required.  ho hum.

I put the RT handlebars back on with a slightly more rearward slant to them.  This seemed to work well on the way into work this morning and the bike did not seem to be quite so slow steering - although I cannot for the life of me figure out why.  I must be imagining it.

Form over function?  I already know where I lie on that one.

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Steve Hawkins R100 (that wants to be an R65)

Offline Barry

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #33 on: April 04, 2013, 04:36:51 AM »
I agree cutting springs is not a great solution but could you grind 1/8" off each end of the spring

I wonder if there is enough meat on the stanchion top plugs to turn 1/4" off the spring face ?  

You might also be able to turn a bit of the damper rod piston top but that's getting to be a drastic mod.

 - it could all add up to what you need.
Barry Cheshire, England 79 R45

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #34 on: April 04, 2013, 11:40:23 AM »
i've an article somewhere on how to lower forks by adding a spacer internally

It's quite an easy job to do by the look of it.
I'll try dig it out now


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Offline steve hawkins

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #36 on: April 05, 2013, 04:36:42 AM »
Peculiarly enough, as I inferred above, I seem to have lost the slow steering nature of the bike by slanting the handlebars back a tad.  

The position of the hand grips is probably only between 1 or 2 inches towards the rear from where it was.

Perhaps i just have a little more leverage?  But the bike seems fine now - lots of fun to 'snort' around in the traffic.

I am now not sure I can be bothered to muck about with it any more :)

Time to look at exhaust tape for the 'look'  and finish off the saddle.

Cheers

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« Last Edit: April 05, 2013, 04:39:38 AM by steve_hawkins »
Steve Hawkins R100 (that wants to be an R65)

Offline steve hawkins

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #37 on: April 19, 2013, 04:07:20 AM »
Okay,

I scored a set of R100 handle bar clamps from ebay for £5 plus another £5 for postage.

I had a spare R65 top yoke which I have modified by grinding off the handle bar mounts and the front mounts for the standard iron-mongery that mounts the headlight, indicators, etc.  I then smoothed it all off.  It ain't mirror finished, more 'brushed aluminium', but it responds well to autosol.

I then stripped and polished the handle bar clamps and got some allen key dome headed SS bolts to fix the clamps to the yokes.

I am now ready to clean up the top yoke area and possibly make a new mount for the idiot lights and the ignition.  I have also solved the problem with allowing my fork stantions to be able to come up through the yoke to offset my 19 inch spoked wheel.  This will also allow me to fit a set of renthals.......

As you can see with modifying a bike, one change always leads on to another... And another.....Etc.

Cheers

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I am starting to think this thread belongs in the rebuild/project section
« Last Edit: April 19, 2013, 04:11:35 AM by steve_hawkins »
Steve Hawkins R100 (that wants to be an R65)

Offline steve hawkins

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #38 on: April 22, 2013, 03:05:51 AM »
So here it is fitted.

Its tidied the front end up nicely.  Still with the RT bars as I could not get the left hand (clutch) switch gear on the Renthals - as they had knurled the bar end.  And I was afraid of breaking the mounts.
Steve Hawkins R100 (that wants to be an R65)

Offline steve hawkins

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #39 on: April 23, 2013, 07:24:01 AM »
Jumped on the R100 today - Oh dear what a wobbly ride to work!

Having ridden the R65, with its wide and high RT handlebars and upright riding positon exclusively for the last month, the lower, less wide Euro bars were a bit of a shock.

Took me ages to get used to it again!

Cheers

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Steve Hawkins R100 (that wants to be an R65)

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #40 on: April 24, 2013, 04:33:34 AM »
i went out on the R65 for the first proper ride last night, i'm sure the bike gets faster, each year.
I alwyas get to this time of year and think i'll sell it and go for a superbike, but then i ride it!!



Offline steve hawkins

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #41 on: April 24, 2013, 09:41:26 AM »
Never change bikes.

If you fancy a change just change your bike.....its more interesting.

I used to frequent a 'bike night' at a local pub.

There used to be rows of brand spanking new Ducaties, Blades and Gixers.

Where was the crowd?  

All around my R65 or any other self built special that happened to roll up.  Especially if they heard me come in.

In fact, even the blinged up Harleys never got a second glance......

Cheers

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Offline montmil

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #42 on: April 24, 2013, 10:20:19 AM »
Quote
Where was the crowd?  

All around my R65 or any other self built special that happened to roll up. Especially if they heard me come in.

Cheers

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Interesting, Steve, and quite frequently true.

During last weekend's Red Bull MotoGP weekend, son Zach, aka recondotexas, rode his mildly tweaked '83 R65 past a parked covey of racy BMW R100RRs and a couple HP4s. To a man, they all gave him thumbs up. Made his day.



Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

Offline steve hawkins

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #43 on: April 25, 2013, 02:02:44 AM »
10m of black exhaust wrap arrived in the post yesterday.

Looks like I will be cladding my headers this weekend......

Hopefully it will be better looking than high temp paint.

And a new rear Conti is waitng at the tyre emporium.  Decided against the semi-knobblies, as although the back tyre is shot, the front has a lot of life left in it and I find I am too tight to chuck a perfectly good front tyre......
« Last Edit: April 25, 2013, 02:03:33 AM by steve_hawkins »
Steve Hawkins R100 (that wants to be an R65)

Offline steve hawkins

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Re: Time for a change - Perhaps a bit of 'Bobbery'
« Reply #44 on: May 01, 2013, 02:58:03 AM »
Tape on.

Not as nice as a stainless set of headers, but better than black high temp paint that does not want to stay on very much....

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Steve Hawkins R100 (that wants to be an R65)