Benefit of EZ Clutch, It Works Fine

[Mac Kirkpatrick]

Very precise fairy tale.


Mac Kirkpatrick
Glenmoore, PA

"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue


On Wed, Aug 19, 2020 at 8:33 AM Tom Cutter via Airheads <
airheads at lists.micapeak.com> wrote:

> Todd-
>
> The reason that the EZ Clutch works well on Karl's R90S is that I knew that
> he was planning to use it when I rebuilt that engine and gearbox. The
> reason that makes a difference has not been discussed at all.
>
> Hedz-
>
> Crisp clutch engagement on a dry single-plate clutch requires very precise
> control of several factors. Two that are not so obvious are the crankshaft
> and transmission input shaft end float or "play." Disassembly of the
> gearbox and engine are required to accurately set shaft end float. Just
> swapping shims is NOT the answer, in fact that can cause engine seizure or
> gearbox bearing failure.
>
> BMW and GETRAG have not been so consistent in setting end float, and the
> float changes with accumulated mileage-related wear. Those of us who have
> ridden a lot of different Airheads will know that every bike has a slightly
> different clutch engagement feel. The reason for that difference is the
> too-wide range of tolerances that BMW and GETRAG allowed to pass assembly
> inspection.
>
> This relates to the EZ Clutch kit because the kit reduces disengagement
> travel by half, so that can combine with too-much end float on the crank
> AND input shaft to make a full clutch disengagement impossible, resulting
> in slight clutch drag even with the hand lever fully pulled. That drag will
> result in stiff, recalcitrant shifting, accelerated clutch disc wear, and
> possible throwout bearing failure. Clutch cable play adjustment becomes
> VERY critical to avoid these issues.
>
> Just chucking an accessory on the bike without truly understanding how it
> works and what the contraindications might be can end with a spoiled
> vacation or costly repair bill.
>
> When somebody makes a recommendation, and repeatedly makes an Appeal To
> Authority argument by name dropping, beware. Do your research and pay close
> attention. This list and other Internet sources are fountains of
> information without a filter. Remember that wrong information looks just
> like accurate advice when presented in Arial 10-point font. One day, we
> will have AI available to sort information based on the accuracy and
> veracity. Then, the foolish stuff will be presented in a Spastic Crayon
> Scribble font and the accurate stuff will be in a Fancy Times New Roman
> type font.  ;)
>
> Everybody have a great August 19th!
>
> --
> Tom Cutter
> Yardley, PA
> www.RubberChickenRacingGarage.com
>
> "The true meaning of life is to plant trees, under whose shade you do not
> expect to sit." --Deepak Panwar
>
>
>
>
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> On Mon, Aug 17, 2020 at 9:24 PM Todd Trumbore via PAAirheads <
> paairheads at casano.com> wrote:
>
> > Karl Duffner had his EZ Clutch conversion on his R90S for over 300,000
> > miles without any problems.  I’m the present owner and never had a
> problem
> > in the last 10 years. Shifts are smooth as silk... Can’t argue with
> > success.  Enough said.
> >
> > Todd Trumbore
>
>
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