Is this normal? - NSR 125 R cold start

tokarev · World Chat Champion Joined: 20 Jan 2005 Karma :

hi,

every morning when i go to start my NSR 125 R, i put the choke out, and wait a while for it to warm up a bit. I then put the choke in and give it a bit of a rev up to 8k revs.

The thing is when i rev it up a hell of a lot of white smoke comes out for about 10 seconds non stop. It then dissapears and everything is normal.

If i start the bike up when it is warm or has been used a few hours before there is no smoke at all and starts up without choke fine.

The smoke is only there in the cold mornings. I was just wondering if it normal for all that smoke to be there.

Also do i have to rev it up and get rid of all the smoke before i ride or should it be fine? Damn neighbours complain about the noise (well the old gits). It is not even that loud Rolling Eyes

Cheers

,

Cyrus

Rollins · Trackday Trickster Joined: 14 Jul 2004 Karma :

It sounds like you leave the choke on for longer than you should really, dumping all that fuel & oil in the bore & then revving it up to 8k, not surprising that it makes a lot of smoke. But you shouldn't be revving it that high whilst warming up, or a big repair bill will come your way.

As you say, there's no smoke when it's warmed up & you don't need the choke - that's because everything is up to temperature, designed to run as it should be. You only need the choke on cold starts to help the spark catch, as more fuel = bigger bang = easier for the cold engine to start up.
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simon1221 · World Chat Champion Joined: 28 Jul 2004 Karma :

I get loadsa smoke after starting my tzr. Its normal get used to it. Thumbs Up

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tokarev · World Chat Champion Joined: 20 Jan 2005 Karma :

alright thanks for the advice,

Cyrus

fuzz · World Chat Champion Joined: 24 Mar 2004 Karma :

I usually leave the choke on until he revs start dropping (from about 3-5k) to just over idle. Choke off and blip slightly to avoid stalling. From there I just pull away and wait to get to temperature before going past 5-6k revs.
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alains · World Chat Champion Joined: 08 Jul 2004 Karma :

the nsr need at least 5mn running before you see the temperature going up . but before that start on choke , leave it until the engine come stuffing put some throttle on (2500revs) and choke off . stay on for 1 mn and go . when you stop for a while , after turning engine off , put the choke on and leave it . your next start will be much easier
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Wave2k · G's Stalker Joined: 06 Apr 2004 Karma :

NSR's look like there on fire when u start them from cold
its normal Thumbs Up

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binge · Emo Kiddy Joined: 02 Jul 2004 Karma :

Well my scooter wouldnt start at all this morning because the air was so damp. It REALLY hates the cold! Sad

And to make things worse, my radiator pipe cracked and coolant was EVERYWHERE!

Im going to be busy tomorrow.

Oh, and with the white smoke, I think its just the moisture coming out.
Nothing to worry about...

<|Binge|>

Frost · World Chat Champion Joined: 26 May 2004 Karma :

It's 2 stroke...

If it aint smokin, it ain't runnin! Laughing

NSR125-Kid-UK · Attention Whore Joined: 03 May 2003 Karma :

My NSR (just rebuilt), start it with the choke on and let it run until it sounds like it's gonna stall...

....then I have the choke off and just keep blipping the throttle until the temp guage reads ok Smile

.

Not like Lee - when he had his RS50, he warmed it up by redlining it until smoke stopped coming out of the exhaust! Neutral

I kid you not! Shocked

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neon · Nitrous Nuisance Joined: 16 Jun 2003 Karma :

yup, binge is correct, its a build up of moisture in the barrel, nothing to worry about. just dont thrash it to 8k like rollins, you'll kill the poor bast*rd Wink

tokarev · World Chat Champion Joined: 20 Jan 2005 Karma :

Cheers for the information. This morning i started it with choke out for about 30 secs then put the choke in and blipped the throttle to about 2k a couple of time and then just let it to warm up. There was no way as much smoke as before. Works fine now! Cheers!

...It wouldnt do if we needed a quick getaway ( takes about 5 mins to warm up) lol
Very Happy