Prev: Today's ride
Next: Sputnik
From: ? on 9 Jun 2010 09:43
On Jun 8, 11:15 pm, totallydeadmail...(a)yahoo.co.uk (Tinkerbell) wrote:

> There's also a reason why tyre and bike manufacturers recommend checking
> tyre pressures when cold. It's because they *know* that the pressure
> increases as the tyres warm up, and factor that it.

And I suspect that the daily temperature variations in Japan are far
less extreme than they are here in California's central valley, where
the temperature might change over a range of 60 degrees F in six or
seven hours.

So the advice in a Japanese owners manual might reflect less extreme
conditions.


From: ? on 9 Jun 2010 09:48
On Jun 8, 11:20 pm, Eiron <E1...(a)hotmail.com> wrote:

> Fill your tyres with nitrogen.
> The pressure will not increase so much as they heat up.

The reason for using nitrogen to inflate tires is that it is a *dry*
gas and the pressure won't increase so much due to the vaporization of
*water* when the tires get *really* hot.

The first time I ever saw nitrogen used to inflate tires was in an
aircraft tire shop.

Aircraft tires get so hot during landings they are an explosion hazard
to ground crew placing wheel chock once the aircraft is parking.

From: saddlebag on 9 Jun 2010 18:24
On Jun 8, 11:50 pm, "Tim M." <tomorrowaterolsdot...(a)yahoo.com> wrote:
> On Jun 8, 1:15 pm, "?" <breoganmacbr...(a)yahoo.com> wrote:
>
>
>
>
>
> > Has anybody ever been in a situation where they were tempted to
> > *reduce* air pressure in their tires for comfort during a ride?
>
> > The recommended minimum air pressure and suspension settings
> > in my Yamaha FZR1000 owner's manual don't work for me.
>
> > The area I live in has rather extreme temperature variations which I
> > doubt ever occur in Japan where the test riders must have
> > determined the recommended settings.
>
> > It can be 55 degrees in the morning here and I set my rear tire
> > pressure to the minimum 36 psi recommended by the manual.
>
> > I have the rear suspension preload backed off almost to the minimum.
> > Backing off any more will result in bottoming.
>
> > By midafternoon, the temperature is up around 100 degrees and the
> > pavement temperature has to be at least 120 degrees.
>
> > The rear tire pressure rises to 40 psi and the motorcycle becomes a
> > torture rack over the roughly paved county road that is the last 20
> > miles of my route.
>
> You do realize that you can reduce your tire pressure to 36psi after
> it has risen to 40psi, right?   You do know that different tire guages
> give different readings, right?   And you have checked yours to see
> that it is not reading 10 or 15% low, which is very common, and could
> mean that you are riding around with 44-46 psi in your rear tire once
> it comes up to operating temperature, right?
>
> I know an experienced rider like you, riding a liter sportbike, knows
> all this already.  I'm just mentioning it because you did not mention
> it in your whine^h^h^h^h^h post.
>
>
>
> > I was riding slowly along the bumpy back road yesterday when I saw the
> > lights of a bunch of Harley riders behind me, so I moved to the right
> > and let a dozen bikes pass me.
>
> > They were riding twice as fast as I could go,
>
> This is not a surprise in any way.
>
> > and I suspect that
> > their balloon tires and softtail suspensions made for a much more
> > comfortable ride than my sporty bike.
>
> Softtail suspension is notorious for its short travel, harsh spring
> rates, and poor damping.

Hmmm, that's a shame as I thought the suspension on the Road King was
pretty damn appropriate for its mission. Guess one needs to ride them
all...
From: Tim M. on 9 Jun 2010 22:22
On Jun 9, 9:43 am, "Krusty Kritter" <WhinerBoy...(a)yahoo.com> wrote:

> And I suspect that the daily temperature variations in Japan are far
> less extreme than they are here in California's central valley, where
> the temperature might change over a range of 60 degrees F in six or
> seven hours.
>
> So the advice in a Japanese owners manual might reflect less extreme
> conditions.

In which case simply bleed some of the excess air out of your tire and
see if the ride is more comfortable. How freaking hard would it be
to try that, for a big time mile eater like you?
From: Tim M. on 9 Jun 2010 22:23
On Jun 9, 6:24 pm, saddlebag <saddle...(a)aol.com> wrote:
> On Jun 8, 11:50 pm, "Tim M." <tomorrowaterolsdot...(a)yahoo.com> wrote:
>
>
>
>
>
> > On Jun 8, 1:15 pm, "?" <breoganmacbr...(a)yahoo.com> wrote:
>
> > > Has anybody ever been in a situation where they were tempted to
> > > *reduce* air pressure in their tires for comfort during a ride?
>
> > > The recommended minimum air pressure and suspension settings
> > > in my Yamaha FZR1000 owner's manual don't work for me.
>
> > > The area I live in has rather extreme temperature variations which I
> > > doubt ever occur in Japan where the test riders must have
> > > determined the recommended settings.
>
> > > It can be 55 degrees in the morning here and I set my rear tire
> > > pressure to the minimum 36 psi recommended by the manual.
>
> > > I have the rear suspension preload backed off almost to the minimum.
> > > Backing off any more will result in bottoming.
>
> > > By midafternoon, the temperature is up around 100 degrees and the
> > > pavement temperature has to be at least 120 degrees.
>
> > > The rear tire pressure rises to 40 psi and the motorcycle becomes a
> > > torture rack over the roughly paved county road that is the last 20
> > > miles of my route.
>
> > You do realize that you can reduce your tire pressure to 36psi after
> > it has risen to 40psi, right?   You do know that different tire guages
> > give different readings, right?   And you have checked yours to see
> > that it is not reading 10 or 15% low, which is very common, and could
> > mean that you are riding around with 44-46 psi in your rear tire once
> > it comes up to operating temperature, right?
>
> > I know an experienced rider like you, riding a liter sportbike, knows
> > all this already.  I'm just mentioning it because you did not mention
> > it in your whine^h^h^h^h^h post.
>
> > > I was riding slowly along the bumpy back road yesterday when I saw the
> > > lights of a bunch of Harley riders behind me, so I moved to the right
> > > and let a dozen bikes pass me.
>
> > > They were riding twice as fast as I could go,
>
> > This is not a surprise in any way.
>
> > > and I suspect that
> > > their balloon tires and softtail suspensions made for a much more
> > > comfortable ride than my sporty bike.
>
> > Softtail suspension is notorious for its short travel, harsh spring
> > rates, and poor damping.
>
> Hmmm, that's a shame as I thought the suspension on the Road King was
> pretty damn appropriate for its mission.  Guess one needs to ride them
> all..

The FLH touring bikes do not have Softtail suspension.
First  |  Prev  |  Next  |  Last
Pages: 1 2 3 4 5 6 7 8 9
Prev: Today's ride
Next: Sputnik