Should i let my bike warm up it self or ride it straight awa

[ko5i]

Hi all.
Before i was told not to ride a cold bike and let it warm up.
So i was always starting the bike and let it warm up for about 2 min until the temperature is no longer ''low''
But now i read that you should wait 5-10 seconds for some oil flow and then you shouldn't just wait and let it warm up it self but just ride [not reving high] and warm up by riding ?

So whats the best ? and why ?

Thanks !

[Pete.]

Ride it normally. Don't labour the engine until it's up to temperature.
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[tom_e]

Start it up, let fast idle drop which is about the time it takes me to sit on it and drop it into gear, ride, don't spank it's arse too hard until it's at a reasonable temperature.

[ko5i]

ok thanks , i was always waiting for it to warm up it self before riding for about some time so now i will just ride it

[The Shaggy D.A.]

Depends on the bike.

YBR - press button, ride off.
Enfield - start, wait until idle settles. Usually under 2 minutes.

In both cases they don't get thrashed until I've done a few miles.
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[andyscooter]

[yen_powell]

I've been round the clock mileage wise on bikes I would start and ride straight off. Just take it steady for a little while.
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[Kawasaki Jimbo]

This, and a similar recent thread, has been enlightening. With the exception of my first bike (Yamaha XJR400) which would bog down if not driven off almost immediately, I've always followed the received wisdom of the day and warmed my bikes up until they come off choke/fast idle. Allowing the idle to settle makes the bike easier to ride, and I'll keep doing it for that reason. However it sounds as though the "warming the oil" argument is bogus.

The warming idea might have come from aero engines where the engine needs to be at full power for take off, whereas as tom_e said, "don't spank [the bike's] arse too hard until it's at a reasonable temperature."

[Polarbear]

The 'warming up' came from 70's/80's strokers. People used to jump on them, give it beans and fuck the engine.

I always used to start my bikes and let them warm up while I put on my jacket and helmet and it's become a habit I still do.

I'm sure with modern machinery it really makes no odds as long as you are gentle with the engine until it's up to temperature but I'll stick with warming mine up a bit first.

Who warms up cars first? I don't. Mind you, I don't do much else to them either. Oil? pah
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[kgm]

With my carbed bikes take it off choke and let it sit for a short time a minute or two) otherwise they bog a little initially.

With my FI bikes, as others, I wait until it comes off fast idle because, as mentioned, it makes it easier to ride as I'm not having to feather the clutch so much. Usually this just means starting it, sticking helmet and gloves on, then riding off. Not totally necessary but as I said - nicer to ride.

Jimbo - indeed; it was a good 5 minutes or so until my microlight was ready for taxi - warm until oil temp was about 50degC if I remember correctly. Reduces the risk of a stoppage as you're immediately hitting full throttle when on the runway.

[ko5i]

So basically it hasn't been said a clear answer like to this because it will damage this or do this because it wont damage this or that.
Basically people warm up bikes differently up to their preferences.

What i used to do i mean i still do it since beginning turn the engine on and let it idle for the time i put my gloves neck warmer and a helmet on and fix my pants too and back pack and then it just goes from low to 43C and i just ride of but i always wait for it to change from low.

[P.addy]

Start bike, put gloves on and leave.

I pretty much climb on mine, unlock steering, start it, walk it backwards out of the gate and ride off. No real hard riding until its sitting in the 70-80 degree range, when riding thats only a few mins.

[Polarbear]

[Commuter_Tim]

[Kickstart]

Hi

Pretty much always just start and ride off asap (just take it easy for a while). Oil will get around rapidly, but it will take ages for the engine to warm up at idle and the longer it is cold / on choke the worse.

Very few bikes I have had have been that nasty when cold. Bandit is a bit with the slide carbs if the road baffle is in the exhaust.

Major exception is when it is nobbin cold and I want the heated grips to warm up

All the best

Katy
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[mudcow007]

My take on all of this is...

Start bike (bandit) with full choke, it will idle fast - back this down a touch with the choke

Put gloves on & ride away. every set of lights etc i knock the choke down a bit

Does anyone let a bike "cool down" before turning it off? My neighbour had a ER5 which he just let it sit idling after a ride to "let it cool down

[Conzar]

Cooling down is only really for turbo'd engines after being driven hard
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[davethekwak]

All engines have an ideal (designed) operating temp range. This is the temp where all the components of the engine have expanded to designed tolerances. Oil also has a best operating temp range.
The above would suggest letting engine warm up to be best practice.
BUT
Modern engines do not function well without any load and have a tendency to glaze the bores which goes against the let it warm up idea.
Net result is you need to compromise. Engine needs to have oil circulating but that only takes a few seconds. After that you should be riding the bike to put some load on the engine but not extreme load. I work on a simple max of 40% revs and slower opening of the throttle until all is up to temp.
Above applies to petrol engines, diesels are a whole different kettle of fish

[Copycat73]

two or three minutes idle while I set the sat-nav ..brake light & headlight .. lid & gloves ..

because I get a better throttle response ..particularly the ZZR14 ..

and loading a cold engine is not good for it ...
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[chickenstrip]

Fazer 1000. (carbs) Start bike. No choke needed cos Ivanised Pull on lid and gloves. Ride off. By the time I get to roads on which I want to have some fun, it'll be warm - 2-3 miles.

Striple. (injection) Start bike. Pull on lid and gloves. Ride. Same as above: 2-3 miles and it's ready to thrash.
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[chickenstrip]

[davethekwak]

Turbos are cooled by a flow of oil over the bearing which are at the center of the turbo. This keeps the bearings at a lower temp than the rest of the turbo and the constant cycling of the oil over the bearings and through the oil cooler keeps the oil with its operating temp range.
Now if you raz the bike you heat the outer components of the turbo, bearings and oil remain at reasonably constant temp. If the bike is allowed to cool with engine running then the outside of the turbo cools whilst the bearings are stilled cooled by a flow of oil. If you just shut off the engine the oil flow stops but the heat of the outer components now starts to increase the temp of the bearings and the now static oil coating them.
It is this significant increase in temp that cooks the oil on to the bearing.
Next start up the bearing ain't working so well. If this continues eventually the bearing will seize.

[chickenstrip]

[kramdra]

If your not moving its just wasting fuel, a big difference to mpg.

[Copycat73]