2 stroke warming up

[HardDriver]

Hi. Did you know, how to know when you bike is enough warm up? Need to watch temperature sensor in speedometer, or just touch the engine . Also, I heard that is bad for idling, it could cause chance for oil to build up on the plug and in the exhaust. What's happened when in motor? Power is slowly? Don't start engine? Possible clean all this shit? Also when you idling it could overheat the engine, but c'mon, how to warm up when the engine? It's just start and drive any seconds from starting? No idling? When I'm puting my bike from garage and locking and so one. I think bike idling for 2 or maybe 3 minutes? It's bad?

[andy_uk]

I'm sure someone more knowledgeable will come along, but all I normally do is start it up with choke, keep the revs below 4k for the first 5 minutes then just ride it normally.
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Aprilia Classic 125, GS500E, ER5-A1, ER5-C4, ER6 & an XJ6 project frame...

[HardDriver]

[joshuaHolden]

If you don't need choke to start don't use it.

When the top of the radiator or the exhaust feels warm it's usually a good indication, I tend to idle for a minute, give it a couple of revs to just below the red line wait a minute then set off making sure for the first mile or so I don't red line then I throw away the leash and thrash the crap out of it...


ps mines a HONDA NSR 125 R, idles at 1200 revs but you can adjust the carb screw to change the tickover..


not like this: https://www.youtube.com/watch?feature=player_embedded&v=zvr_Y4xSuks **comments are funny**

do it more like this:
https://www.youtube.com/watch?v=GCV0TD_vcJ8

[RhynoCZ]

Never fidle with the idle screw when the engine is cold.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[Kickstart]

Hi

Start up (with the choke if necessary) and ride off pretty much immediately.

With a temp gauge, wait until it is up to temp before thrashing it (and watch out for the temp dropping when the stat first opens)

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[HardDriver]

Okey, so 1 minute it's normally to warmed up, but what's wrong becoming if you idling and how that affecting your engine?

Also, what is "stat first opens", I don't get that part?

Also, when you idling in cold engine it's damaging your engine or it's not accure?

And why you need to ride pritty much immediatly to drive?

[RhynoCZ]

I do it this way: Start the engine with choke if needed, then when the engine can hold the idle, I turn the choke off and after a while when the engine responses to the throttle movement, I ride it. Still go slowly until the temp gauge doesn't reach certain level or it feels like it's ready. Then I give it hell.

This applies to every 4 stroke engine with manual choke and carbs I've ever been on. Two strokes are going to be the same.

Throttle response = when the engine of my zxr is cold and I twist the throttle it stalls, that's why I warm it up a bit. The zxr engine is tuned for high revs, so can't be ridden around the idle, especially when cold.

GPz did that too, the CB-1 was good to go from cold.

Mate's MZ150 ETZ is also good to go from cold, but it's crap till it gets a bit warm, the clutch slips, the engine has got no power and so on. Not that it's a powerful beast after it gets warm enough.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[skatefreak]

You have a lot of basic questions,
I would suggest reading up a little more about engines etc

Running the engine at idle from cold is just fine, the oil wont build up in the engine or the exhaust because
premix : Idle = low throttle = less fuel/oil
Oil injection : Idle = low throttle = less oil injected.
The oil pump is linked to the throttle so as throttle increases the oil does to.

The choke is used to get the bike started when its to cold to start without. If its warm there is a good chance you wont need the choke however if its cold, you should.
Many people will start the bike and ride straight away and ride Gentility because this will not cause the engine harm.
To get on a cold 2 stroke and red line it will kill the engine fast!

Just make sure you keep the rpm down, stay out of the power band (higher rev's where the power comes in) however try not to labour the engine (pull the throttle all the way back at 2,000rpm).

The 'Stat' or thermostat is just the valve on the engine cylinder jacket which lets the coolant flow from the engine to the radiator once the engine gets up to temperature. Once this opens at first, as the cold coolant from the radiator circulates through the system it can cause a temperature dip.

Personally I've never concerned myself about this but I mostly commuted out of towns when I was on a 2 stroke so not to much opportunity to thrash it whilst cold!

Any more questions?

-Jvr

[HardDriver]

So I get it. It's not so bad in idling. You can drive or idle, so thanks for that. Because It's my first 2 stroke, and I won't harm the engine, but if I drive on 2rpms I think I can't drive, because it's won't be power, I think until 4 rpms, maybe 5 is good choise, because my kmx have 13, from 9 to 13 I think is red, power valve becomes from 6-7, so 4-5 is good yes?

Also, why Never fidle with the idle screw when the engine is cold?

[RhynoCZ]

[HardDriver]

[RhynoCZ]

You Sir, have got quite a lot of questions.

What do you mean with ''oil is making''? If you mean the oil stays in the engine or exhaust when the engine is off, it's alright. If you run right pre-mix or the mixer/autolube works fine and there's no faulty gasket around the gear box, the amount of oil that stays there can't harm a thing. In fact oil keeps your exhaust from rotting away.

It's not long ago when I started my mate's MZ 150 ETZ after 8 months, the most of the petrol evaporated and there was quite a lot of 2 stroke oil in there. It was very smoky, but alright.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[stevo as b4]

OP either needs to read more, or is trolling or just retarded. Nearly everything he has asked about is plain common sense.

I have my doubt's now that someone of such an apparent lack of Knowledge should be owning a 20year old 125cc 2stroke at all sorry!

[_Iain_]

[joshuaHolden]

[_Iain_]

We all start somewhere, but the guys asking questions that make you wonder if he should even be riding a motorcycle...
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Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

[Kickstart]

[RhynoCZ]