nsr150sp spitting black oil from maffler
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hello anyone know why my sp spit watery black oil from the maffler???
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Most likely your 2T oil consumption is too high. Have you ever measured your 2T consumption? Do you see a lot of white smoke coming out your exhaust, even when the engine has reached normal running temperature?Originally posted by yinjie:hello anyone know why my sp spit watery black oil from the maffler???
For SP, 1 litre of 2T for every 40-50 litres of petrol is normal. The factory setting is even lower, about 1 litre for every 70 litres. Try to adjust your pump, then see if there's still black oil coming out from your muffler. -
not much white smoke leh... even when i start in the morning also very little smoke... its about just nice... but i never check my 2t pump... the exhaust sounds stock also...
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this bike is for what class? nice.
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you mean the nsrsp150 or the picture above?Originally posted by gal gal:this bike is for what class? nice. -
hehe. both. your bike is what class? and the bike in the pic is for what class. sorry huh...
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my bike is class 2b 150cc. The bike in the picture is class 2 1000cc
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is it oil seal broken? not sure haf to cfm wif the lao jiao here.... 
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I think it is normal. My sp have those sticky black black thing at the maffler too.
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ermmm .... i guess having the black oil stuff ( BOS ) at the muffer is better then having it at the spark plug. ...
some of the reasons..
imcompete combustion ... leading to excess mixture leftover in pipe..
rain water --- mix with 2t oil ... and carbon to become BOS
improper tunning / modification .. leading to a too rich mixture that may not be combust fully
is yr bike stock ... is the valve working in good condition ... is there leaking at other places ... any other problems ... starting .. over heating .. etc ... does the BOS smells of petrol ... are you running premix ... 2t pump set correctly ...
what is the color of yr spark plug ...
you can sms my fren .. he does good tunning for scrambler .. dunno if he 12 do SP or not ... 93658648 ... a freelance ... with very good 2 stroke knowledge -
no leaking anywhere and the spark plug tip is white in color only the plug's screw thread area got black oil... no problem with bike... good start good idling, no premix... everything normal but donno if the engine is stock or not...Originally posted by tHoMiE:ermmm .... i guess having the black oil stuff ( BOS ) at the muffer is better then having it at the spark plug. ...
some of the reasons..
imcompete combustion ... leading to excess mixture leftover in pipe..
rain water --- mix with 2t oil ... and carbon to become BOS
improper tunning / modification .. leading to a too rich mixture that may not be combust fully
is yr bike stock ... is the valve working in good condition ... is there leaking at other places ... any other problems ... starting .. over heating .. etc ... does the BOS smells of petrol ... are you running premix ... 2t pump set correctly ...
what is the color of yr spark plug ...
you can sms my fren .. he does good tunning for scrambler .. dunno if he 12 do SP or not ... 93658648 ... a freelance ... with very good 2 stroke knowledge -
[quote]Originally posted by yinjie:
no leaking anywhere and the spark plug tip is white in color only the plug's screw thread area got black oil... no problem with bike... good start good idling, no premix... everything normal but donno if the engine is stock or not... [/quote
which part is white ... the metal part ... near the round one or ? ... be good is theres a pic or something .... does the black oil at the screw thread smells of petrol .... or is it thickish ...
is there a drop in enjine oil level ... as in that the enjine oil level is dropping faster then before the problem occurs ..
from the way i see .. it could be as simple as a tunning problem ... or as complicated as a worn crank seal ... -
2T or Petrol...Originally posted by yinjie:hello anyone know why my sp spit watery black oil from the maffler???
Try retune it...