what causes a smoking two stroke?

[hazza]

yeah i know they are supposed to smoke a little but what makes exesive smoke? my freinds tzr 125 is smoking like a bitch and a mechanic said (without looking) the oil pump needs ajusting. it started to smoke after a 25 odd mile trip and was fine before so i thought what he said was crap, but hes the mechanic not me. so any ideas?
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3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[Hex]

The more oil, the more smoke. Thus the mechanics suggestion.

Of course I've had headgaskets go before and the water and oil getting pulled in to the barrel produced lots of smoke.
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[hazza]

it was just as it happened suddenly i thought it could be something else like oil seals because the smoke seems to come out white...and well i dont actually know what his oil pump looks like but on mine theres no way it can ajust itself because theirs a little clip to stop it
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3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[cagiva gezzer]

Knackered crank seals make them smoke. Check the gearbox oil level to see if it drops.
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"because one stroke isnt enough and four strokes waste two"

[BFG]

[alains]

most of smoke come from : clogged exhaust , not fully synthetic oil , bad oil pump adjustment .
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the worst day fishing is better than the best day working

[hazza]

we thought it could be the exhaust so we cleaned that so the insides are spotless....still smokey, he says there is no change in performance, dosent run on fully synthetic never has....
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3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[alains]

look your oil pump adjustment , could be too high
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the worst day fishing is better than the best day working

[NSR Mick]

Is the water level dropping?
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If you dont like the way that I ride.......Stop trying to keep up!!!

[simon1221]

Or maybe the grarbox oil?

Is it a mk1 (old) or mk2 (new) tzr?
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DNA50 (sorry) ->> TZR125l >> GPZ500S

[hazza]

its the mk 2 one.....a few days ago i told him he had no oil (absoloutly nothing could be seen in teh sightglass) so he had it filled up by the mechanic he knows and he said thats when it started smoking and by the time he got back home (half mileish) there was no oil in the sightglass again
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3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[blackmaxger]

White smoke is caused by water getting into the combustoin chamber, it isn't smoke but water vapour, if that is the case then it could be the head gasket blown. But I don't think would lead to poor oil consumtion, best bet is to take it to a dealer to get sorted.
All the best Gerry

[cagiva gezzer]

[NSR Mick]

there we go then, knackered crank seals.
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If you dont like the way that I ride.......Stop trying to keep up!!!

[hazza]

ill break the news to him then
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3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[no_shad]

My planet smokes badly until warmed up, once up to working temperature i'd be lucky to see a wisp.

I assume it is condensation related, and would probably benefit from an exhaust decoke.

[alains]

that's normal for every 2 strokes
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the worst day fishing is better than the best day working

[Hex]

[NSR Mick]

[Kickstart]

[NSR Mick]

[Kickstart]

Do I take it is a 250 then, not a 125?

All the best

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

[NSR Mick]

Correct Keith its an MC21 NSR250.
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If you dont like the way that I ride.......Stop trying to keep up!!!

[hazza]

from riding behind him today i noticed that accelarating makes it smoke more, and whyen riding along it seems to com out in bursts of white smoke not constant
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3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)