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25000 miles later on the VT1100 experiment
Written by gibinmich on 9/30/2010 at 01:28 pm

If I could find a VT rear drive cheap I would do it just for the heck of it. My
bike revving at five to six grand on the highway doesn't bother me or the bike
the least. With ear plugs I can't hear it anyway. My new DR 650 doesn't have a
tachometer but it feels and sounds like its revving less that the PC at highway
speed.

--- In ipcrc@yahoogroups.com, "Jerry" <sanae.ej@...> wrote:
>
> Dave,
>
> Just curious on the cost of the conversion. I got my final drive for $29 +
shipping. So even though the mileage is modest, it helps offset the cost.
>
> If you told me I could spend about $40 to achieve a more relaxed bike at
highway speeds, many would do it. If you frame it as a gas mileage improvement,
then I think most rides (getting about 45-50 MPG) would not.
>
> Jerry
>
> --- In ipcrc@yahoogroups.com, "dave_hiett" <dehiett@> wrote:
> >
> > Got 18,000 now on my VT1100 rear. Something about hitting 60 mph to find -
another gear! Holy Smokes, Batman! Priceless! The reduced rpm at high speeds
makes the PC800 into quite a little interstate eater. At lower speeds I honestly
don't feel a difference except I did have to move my shift points up to keep it
in the 3K - 4K range. For example, she cruises very nicely in 3rd at 35 mph. I
have had absolutely no issues with the change, clutch or otherwise.
> >
> > If you are curious what your RPM's would read with the VT1100, I posted some
pictures in the photo section under 'VT1100 Speedo-tach'.
> >
> > Gas mileage? Oh, it's a bit better, but sure wouldn't recommend it just for
that; you'll be a long time getting your money back. (My complete record since
the conversion is on www.Fuelly.com)
> >
> > Not saying anyone else should do this, I'm just reporting that my experience
has been pretty good. I kept my old rear 'just in case', but I'm not going
back.
> >
> > Dave Hiett '90PC800 'Happy Dog' '94 GL1800 'Lucy'
> >
> >
> >
> >
> > --- In ipcrc@yahoogroups.com, "athet94703" <aflcio@> wrote:
> > >
> > > I've now had the thing 3 years and put just shy of 30000 miles on it. As
the first person to do the VT1100 final drive swap, (and that I haven't checked
in here for a while...) I thought I'd give an update.
> > >
> > > First of all, it's the same old cam-seal leaking, dodgy 3rd gear bike its
always been. The VT1100 gearing gives a consistent 45mpg, and that's with no sub
airbox lid and a lot of rejetting, leading to 51hp.
> > > I'm a few hundred miles short of 100000, and will probably be putting a
replacement engine in it this winter, as the transmission has been shaky the
whole time I've owned this bike. That said, it hasn't gotten any worse in 30k
mi...
> > >
> > > So if you are thinking about re-gearing your PC, I would recommend it,
with the caveat that some rejetting and perhaps some stronger clutch springs
would be a good idea.
> > >
> > > If you spend a lot of your riding time in town it might not be worth it,
but if you do many highway miles it extends the mileage and comfort zone 5-7mph,
which is enough here in the SF Bay area to be adequate in traffic.
> > >
> > > -Anton
> > > 1990 PC800 99780mi 'Junk in the Trunk'
> > > 150/90/15 ME880, VT1100 3.08 gears, 152/155 main jets, needles shimmed
2mm, air box sub lid removed, stock pilot jets, fuel screws 4 turns out. Front
lower bodywork by TAP Plastics, Rifle screen.
> > >
> >
>