From: bill@wsuaix.csc.wsu.edu (William E. Johns;S23015)
Newsgroups: rec.motorcycles
Subject: Re: BMW carbs
Keywords: Boxer twins, Bing carbs
Date: 13 Aug 92 17:36:42 GMT
Organization: Washington State University

In article <1992Aug13.002603.27267@rtsg.mot.com> svoboda@rtsg.mot.com (David Svoboda) writes:
>In article <1992Aug12.152656.1382@serval.net.wsu.edu> johnsw@wsuvm1.csc.wsu.edu (William E. Johns) writes:
>|
>|As long as we're talking Beemer tuning, I want to echo something bob
>|pasker mentioned some time back.  I had my Yamaha mechanic tune my FJ
>|with the hydrocarbon/CO monitor and the FJ now runs so well it's scary.
>
>I would love to have this done on my Concours.  (It would be the first
>time since the 600 miler that she has seen a mechanic. :-)  I called
>a local Kawi dealership, and when I asked about the CO/hydrocarbon
>testing, he "advised" me to stay away from all that "crap" and
>just set the jetting, and ride it to test it; that mixture is a 
>matter of personal taste.
>
>Well, maybe you can see why I don't like the local mechanics. :-)
>
>One question about your experience, Bill: you said it cost you
>$30 for the tuning job.  What exactly did he tune?  The jets: (Seems
>like you would have to change the mixture to vary the Hdc/CO levels,
>right?)  Surely the labor and parts to change jets on an FJ would be 
>more than $30.

On the FJ, there are small brass "seals" over the interesting adjustment
valves, the ones that are marked "DO NOT REMOVE".  These  were the first to
go.  :-)  Once you have access to these richeness control needles, proper
set up is easy.  The mechanic simply put the bike on the hoist, installed 
the metering pick-ups in the intake manifolds, each with their own valve
for individual control.  He fired up the engine, and set each richness
screw according to his instruments.  Between each HC/CO adjustment, he checked
engine overall carb balance.  When he had done all cylinders, he killed
the engine, drank a coke, we chatted about zen for a bit, and after the engine
had cooled a bit, he checked the whole thing again.  It took about 30
minutes.

There were no hardware changes to be made.  It still has all its original
jetting.  The EPA required settings run so lean that the bike is simply
not happy.  My mechanic made her happy.  :-)

It was fun to watch and listen to.  The engine did not run rough when I 
went in, but when he started working on it, she started to really
smoooooth out.

ON COST:  I picked the FJ for any number of good reasons.  One was that I
checked around and found the best mechanic in the area and bought what he
worked on.  Happened to be Yamaha's at Ray's Cycle in Lewiston, ID.  They
are what a bike shop should be.  My 600 mile check-up cost me about $15.,
the cost of the materials used.  He sold me the 3 year extended warranty at
his cost.  The mechanics are good, and the coffee is always hot and fresh. 
The cost is probably the reasonable cost.  If folks charge more, they're
saving for their kids' college education.

What happened to the rat bike??

Ride Free,

Bill
________________________________________________________________
bill@wsuaix.csc.wsu.edu if you feel compelled to send email
johnsw@wsuvm1.csc.wsu.edu if you seriously expect an answer
AMA #500924   DoD #00314   WMTC #0002   SR= 2.125
FJ1200 R100GS/PD 740GLE  KotV KotRR KotD #0001  :-)
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If you understand, things are just as they are;
If you do not understand, things are just as they are.
                                                        Zen verse