Author Topic: Cool weather riding  (Read 3388 times)

Offline Billk

  • ^ Proficient Motobricker
  • Posts: 120
Cool weather riding
« on: October 12, 2018, 01:20:48 PM »
The temperatures here in NY are starting to drop. Why do I feel
that this, K75 rides better in colder temperatures? Is it me
or is it the motorcycle? Anybody else feels the same? Are these
cold weather motorcycles?
Bill
  • NYS
  • Owned many BMWs and Harley's presently '95 75K and '14 V Strom
Presently own a 1995 K75 and a 2014 Suzuki DL650

Offline blackie1

  • ^ Proficient Motobricker
  • Posts: 255
  • christchurch nz
Re: Cool weather riding
« Reply #1 on: October 12, 2018, 03:03:42 PM »
cooler air temp = air that is more dense = more oxygen in that air = bigger bang with the same amount of fuel

it's not rocket science

.........or is it?
  • christchurch, new zealand , where else would u want to live, really
  • 1991 K75RT naked 67,000kms

Offline natalena

  • ^ SuperNatural Motobricker
  • Posts: 742
Re: Cool weather riding
« Reply #2 on: October 12, 2018, 03:57:42 PM »
Cooler weather as noted above is a denser charge, and the cooling system isn't stressed. Throttle always feels a little crisper, but that just might be the pleasurable ride experience without being slow-roasted like in summer. Great to hear you're out rolling the brick.
  • MST
  • 1987 K75s #0919, '05 Sportster 1200C, '21 ARGO 8x8, '24 KLR650
"Hard to beat a 10x beaver, 'specially if you're gonna work it."

Offline alexg

  • ^ Proficient Motobricker
  • Posts: 202
Re: Cool weather riding
« Reply #3 on: October 12, 2018, 04:05:12 PM »
Just for the sake of it:

I do not think that ICEs run leaner in winter than summer. There is a reason for the MAF sensor: to be able to adjust the fuel according to the amount of air mass. It can be that with every intake stroke, more air mass goes into the cylinder, thus more bang per stroke because both air and fuel have increased.

  • Michigan
  • '93 K75S, 1975 BMW R75/6 & 1984 Yamaha RZ350
Alex G.

Offline K1300S

  • ^ Quintessential Motobricker
  • Posts: 1293
Re: Cool weather riding
« Reply #4 on: October 12, 2018, 05:59:29 PM »
although....K75's do not have Mass flow sensors (MAF).  they have a basic air flow sensor.  there is no "mass" measurement, it is a simple flapper door that moves with the velocity of the air entering the intake.  later versions of the bosch ECU's used a mass flow sensor.
Project Thread "K75s Midlife Refresh"
http://www.motobrick.com/index.php/topic,7810.0.html

Offline The Mighty Gryphon

  • Administrator
  • ^ Quintessential Motobricker
  • Posts: 6843
Re: Cool weather riding
« Reply #5 on: October 12, 2018, 06:15:25 PM »
I may be wrong, but isn't there a temperature sensor in the throat of the Jetronic that is used to calculate air density?
  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline Billk

  • ^ Proficient Motobricker
  • Posts: 120
Re: Cool weather riding
« Reply #6 on: October 12, 2018, 06:54:05 PM »
I was just out in 57 degree temp and the bike, engine, tranny was super smooth.
I have a heat temperature gun and I’ve notice a 10 degree difference when riding
in 57 degrees as a pose to 80degree +,
Where would be the best place on the engine to monitor heat levels.

By the way, we have some heavy hitters on this forum!
Thanks
Bill
  • NYS
  • Owned many BMWs and Harley's presently '95 75K and '14 V Strom
Presently own a 1995 K75 and a 2014 Suzuki DL650

Offline johnny

  • TrailBrakingThrottleWhacker
  • ^ Quintessential Motobricker
  • Posts: 7652
  • Whacking...n...Chopping Sliding...n...High Siding
Re: Cool weather riding
« Reply #7 on: October 13, 2018, 07:51:16 AM »
greetings...

first hard freeze of the season... i like riding mid 30s to mid 60s... rolling out... hope my gps works... caints getts back to the barn without it... unless its clear and jaycar martin can ping me the southern cross...


* 20181013_064532.jpg (19.58 kB . 576x576 - viewed 271 times)

j o
  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

Tags: