nsr 125 great runner if you can see thru the smoke jc20 1990

[SCHOT_NSR]

hi all rite here goes im skint and my last three bikes got niked (persistant ay i) gilera cougar, kawasaki ar and a hombrew twinshock scrambler which i built myself thinking no git would nik summit that ruff i was wrong lol any way after a change of adress and somewhere secure to keep my bike i saved up a few pence that the missus let me keep to keep me happy and a bought a honda alcast jc 20 as a supposedly easy cheap project bloke said he couldnt get a spark and thinks hes let to much 2 stroke in the engine while he was trying to get it started couple of hours work and a bit of cursing i got the bugger going and f me does it go revs well no flatspot pulls well in all gears only thing is there is clouds of smoke i thought as it been a two stroke and it had been standing and what the bloke said i thought id blast it out after letting it warm in the garden for an hour to burn the excess oil(filled the grove with smoke lol)and still clouds of the stuff so i though ill try a decoke on the zaust still clouds of smoke however wen looking at the zuast port there was loads of oil dont know wat to do is there anyway to drain the crank and flush it out etc please help
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if everything around you seems to be going well you obviously aint got a clue whats happening

[cloric_tzr]

my tzr was the same check your oil pump mate if its like mine take the cover off there should be a set of marks were it should be if its not adjust the cable. then take her for a good ride to burn any exess oil off. if thats ok you could have a leaking crank seal. basiclly your leaking gear box oil into your crank which is the getting burnt with you fuel. if te bikes sat for a while it may 'heal' itself once you've ridden it a few times.
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i dumped my girlfriend the other day! she wouldnt act out one of my fantasy's. all i wanted her to do was come home from work, catch me fucking her sister and join in!!! miserable bitch!
My wifes so ugly, the only thing that goes down on her
Is the internet connection.

[skatefreak]

Hey,
Umm, yeah, its quiet normal to do that when cold.
You say the smoke continues though even after its warmed up? Thats not right.

The 2 stroke oil goes into a tank (back left on the older ones, under the tank ont he newer ones (jc22)).
This oil is then fed into the engine by the bike itself so no need to put oil in the tank with the fuel.

Go over to www.nsr125.co.uk and pick up a service manual from on there (may need to sign up) but its well worth it .

Sounds like the oil pump will need ajusting as its probly pumping to much oil in with the fuel.

Easy to ajust, service manual goes through it in great detail

Best regards

-Jvr

[SCHOT_NSR]

thanks for the replys I adjusted the oil pump today after lookin through yet another thread lol the notch was way out so fingers crossed this is the problem. unfortunately i live in the middle of a council estate so i cant take it out for a blast as ive no tax no mot and the fuzz will pick me up straight away lol how long do you think it will take to burn any excess oil off the bike has been sat for a while and ive gave it a good service juust cant get rid of this smoke im starting to think the bloke who i brought it from was telling me porkies about to much two stroke flooding the crank any ideas
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if everything around you seems to be going well you obviously aint got a clue whats happening

[cloric_tzr]

[Thom]

hey mate, just seen this topic - the symptoms do sound like a buggarded oil pump so like i say, try premix, ive just replied to your PM but i think it may be worth seeing if alains is still about, he's the NSR god y'know!
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Current Bike: 1996 Yamaha TRX850 (The Japanese-Ducati One).
Previous Bikes: 1990 Honda NSR125 'Rothmans' (The smoking one), 1990 Suzuki GS500e 'Caf? fighter' (The loud one), 1987 Kawasaki GPX400r (The quick one), 1997 XJ600s Diversion (The reliable one), 2000 Kawasaki ER-5 (The spontaneously combustive one)

[SCHOT_NSR]

Today i was feeling positive and that i would get this thing sorted haha amazing how depleated you feel after 20 fags and half hour sratching your head lol. ON the up i feel like the smoke has calmed down a wee bit still there but not filling the next door neighbours garden as well as mine. however a mate was round today (know all fooka) and he says my engine is louder than it should be lol well i know its loud but he has put the shiters on me when his next words were i can here metal in the engine ratling around now i honestly cant i think it sounds fine just loud he swears he can though so now im thinking what if its the bottom end arrrrgh is there any way i can check without the full strip down or maybe it could be rings but i still have full power etc i dont know helllllllp
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if everything around you seems to be going well you obviously aint got a clue whats happening

[SCHOT_NSR]

cheers thom im just about to send allains a pm hopefully hell have a butchers at the thread but i cant see him saying much differint than what he said to you lol im starting to realy lose hope now it annoys me as it starts first time every time and idles well and all the powers there i dunno
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if everything around you seems to be going well you obviously aint got a clue whats happening

[cloric_tzr]

[SCHOT_NSR]

cloric im sort of thinking along the same lines but dont want to do the top end if the bottoms gone which im starting to wander about as to how loud the thing is no clunking mind just loud when i had fired her up today i couldnt here what my mate was saying lol not so much of a bad thing me thinks
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if everything around you seems to be going well you obviously aint got a clue whats happening

[evoboy]

They all rattle.

Ive rebuilt 2stroke motors completely before and they still rattle and tick.

Nature of the beast.
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Suzuki GT250 x7------- Fazer 600------CB250RS------Aprilia Rally 70----- Bandit 600

APT Motorcycles

[Thom]

Tell your mate to go stiff the fume coming out the exhaust for a while mate - hes likely talking out of his 'bottom' if you wish.

Just try and focus on one possibility at a time, i know how it is as i had exactly the same problem and i got so bogged down with possible issues that i ended up giving up pretty much - i tried everything i could possibly think of, mostly based around the carb however realistically there could have only been one thing at fault and that was the oil pump putting out too much oil.

Like i say, elliminate the chance its the pump by trying the correct ratio of premix and if the smoke clears up you've practically located your problem
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Current Bike: 1996 Yamaha TRX850 (The Japanese-Ducati One).
Previous Bikes: 1990 Honda NSR125 'Rothmans' (The smoking one), 1990 Suzuki GS500e 'Caf? fighter' (The loud one), 1987 Kawasaki GPX400r (The quick one), 1997 XJ600s Diversion (The reliable one), 2000 Kawasaki ER-5 (The spontaneously combustive one)

[SCHOT_NSR]

ill give it a go tomorrow thom without the little devil on me shoulder telling me what else it could be lmao
i know two srokes rattle and that (i owned a few mzs es and ts oh the shame lol) but this is loud
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if everything around you seems to be going well you obviously aint got a clue whats happening

[cloric_tzr]

are u sure there is a exhaust gasket in it? for the loudness that is or induction noise? what exhaust is it standard? my mate had a nsr with a arrow exhaust an boy was tht loud
____________________
i dumped my girlfriend the other day! she wouldnt act out one of my fantasy's. all i wanted her to do was come home from work, catch me fucking her sister and join in!!! miserable bitch!
My wifes so ugly, the only thing that goes down on her
Is the internet connection.

[MarJay]

[cloric_tzr]

[SCHOT_NSR]

Yeah theres an exhaust gasket there i dont know think im going to record a video of it running tommorow and post it maybe will help if people can see for themselves
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if everything around you seems to be going well you obviously aint got a clue whats happening

[MarJay]

[SCHOT_NSR]

another day on the nsr still smoking but not as much but oil still coming out the zaust but on the positive side the engine oil isint going down i ook it out for a quick blast round the grove and it pulls hard for a 125 plenty of power evrything working as it should in my opinion dont know wtf is going on here starting to pull my hair out now plenty of smoke evrywere diconected the oil pump to check it was working correctly and it is any way ive just filmed the bike running on tickover and will post the video later on so you can have a look and listen yourselves.
Oh and one more thing for example if it was the crank seal leaking which i hope its not is there a nice bodge to fix it without having to split cases etc
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if everything around you seems to be going well you obviously aint got a clue whats happening

[Thom]

Although it seemed a bit personal that marjay i admit i know where you're coming from and i made alot of assumptions with regards to my post - assuming the bike was being ridden under load etc.

Apologies if any confusion has been caused!

I stand by my post though - by isolating the fuel pump and ensuring the correct proportion of oil:petrol is used (preferably slightly over oiling) then you should see an improvement if it is infact the oil pump at fault.

Once you've decided this then replace the oil pump and stop running premix, if it is infact the problem!
____________________
Current Bike: 1996 Yamaha TRX850 (The Japanese-Ducati One).
Previous Bikes: 1990 Honda NSR125 'Rothmans' (The smoking one), 1990 Suzuki GS500e 'Caf? fighter' (The loud one), 1987 Kawasaki GPX400r (The quick one), 1997 XJ600s Diversion (The reliable one), 2000 Kawasaki ER-5 (The spontaneously combustive one)

[nightshaddow]

you prob have an excess of oil in the exhaust and now set properly you just burning old crap from the crank and exhaust,

free to try.... clean the exhaust, not done alot with 2 smokes but have read a couple of threads about it summat to to with summat (think it baking powder or bicarbinate of soda summat like) and water, you take off ya exhaust, bung one end, fill it up, leave, empty, then run,

if i remember right it will clean all the carbon and excess oil out so you just have to get rid of the crap in the engine.

WARNING: make sure you check the right amounts and right stuff befor you try someone will know how to do it

found this thread might help
https://www.bikechatforums.com/viewtopic.php?t=172824&highlight=exhaust+cleaning
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"WHAT DO YOU MEAN 100 MPH THATS IMPOSSIBLE Its chinese OFFICER."
Current rides CB 125 TDE(the next project) NS125RK ( now on the road ) CB125TDC (soon to be project 17) melody ( the nephews )

[Thom]

This is an example of what Marjay meant ^^^^^^^^^^^^

Excess oil around the crank?!
Burning off?!

What are you on boy!

And for cleaning a 2t exhaust it is generally accepted that you use caustic soda and water, however it is a potentially harmful job should you not do it safely.
____________________
Current Bike: 1996 Yamaha TRX850 (The Japanese-Ducati One).
Previous Bikes: 1990 Honda NSR125 'Rothmans' (The smoking one), 1990 Suzuki GS500e 'Caf? fighter' (The loud one), 1987 Kawasaki GPX400r (The quick one), 1997 XJ600s Diversion (The reliable one), 2000 Kawasaki ER-5 (The spontaneously combustive one)

[cloric_tzr]

[MarJay]

[cloric_tzr]

marjay where can i get caustic soda from?
____________________
i dumped my girlfriend the other day! she wouldnt act out one of my fantasy's. all i wanted her to do was come home from work, catch me fucking her sister and join in!!! miserable bitch!
My wifes so ugly, the only thing that goes down on her
Is the internet connection.