Re: R1100SA 2-plug top speed disappointment

[Jack Bunce <jackbunce@xxxxxxx>]

On Tue, 4 May 2004 20:33:45 -0400, "Steve Makohin" 
<wateredg@xxxxxxxxxxxx> wrote:

> >SNIP

> You can bet your butt that BMW did not do top speed trials with System 
> Cases
> and a Ventura pack. Strip off the bike-fat, make sure your tires are 
> not
> under-inflated, ensure the bike is tuned to spec, and give it a try 
> again.
Tire pressures were 32 front and 36 rear. 12K mile service was done 
during Bike Week in Daytona so perhaps it was rushed.

> Other things to consider are:
>
> o The altitude and temperatures at which you are doing your runs.
Basically it was sea level with temps about 60 F with the wind about 5 
to 7 knots.

> o You speed measuring device (GPS)
Garmin 176C. My experience has been that Garmin GPS derived speeds seem 
to be right on when checked against radar and they seem to be 
consistent with respect to speedometers, e.g., spot on with the cage, 
and 5 to 7 lower than the bike.

> o Check sources of resistance (brake rotors/pads, wheel bearings)
Gotta do this yet.

> o Check your bike's compression
See above and I am going to attempt to find a dyno in the area. [I am 
expecting about 88 rwhp if the bike meets factory spec.]

>
> 118 mph (slimmed down) is why of where you should be, assuming all is 
> in
> order. Tuning is a big consideration. Decades ago when I had a CB360, 
> it
> would do an indicated 93 mph (crouched) if it was tuned perfectly. As 
> the
> points wore and the timing ran out of adjustment, top speed would dip 
> into
> the mid to upper 80s. My current bike does an indicated 240 kph (149 
> mph).
> >SNIP

OK,  air and gasoline filters, valves and plugs are replaceable or 
adjustable. But isn't the timing computer controlled and therefore 
unadjustable by mere mortals.

Thanks for the info.


cheers.... jack, '04 R1100SA, Waterford, Connecticut, U.S.A.

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