Black stuff comin out from exhaust

[nineh]

hey guys,..

 

recently, there has been black oil/soot kinda stuck comin out from my exhaust.

 

it ok when i start the engine and its on idle. happened twice wen i engage 1st gear den throttle up to move off. both times also my fren behind me kena this black stuff on him! haa

 

anyone knows what cld be the problem???

 

the funny thing is that it only happens when i start the bike and move off. cos after that wen i check (by putting a white paper at the exhaust end and blow the throttle)..all is fine.

 

*BLUR*

 

anyone can provide an insight?

 

thanks in advance

[salvatron]

wad bike are u riding bro?

If its a 2 stroke..The black stuff, it might be excess 2T or ure air/fuel mixture is too rich..

 

ways to fix the problem..

1) lower ure 2T intake

2) go tune ure carbs

[SinFilled]

The black stuff coming from exhaust could be excess 2T oil mixed with unburned fuel, i've learned it becoZ my exhaust oso leaking, even now still leaking lol saving money to get it fixed haha

 

Anyways wack ur throttle to high rpm on neutral once in awhile to clear inside

[ahcongie]

tat's carbon...~~

[LPMS]

Black substance coming out from the exhaust is unburnt 2T. Can go shop & get ur 2T intake tuned.

[LPMS]

Formerly was riding RXZ & experienced with black substance coming out from the exhaust until can leak to the floor when I park overnight. The go to shop & ask them check. Then the mechanic told me 2T open too much. So he do tuning for me. Not exactly tuning but just close the 2T valve a little.