Question about 2001 Aprilia Pegaso 650 i.e.

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Pegaso 650 i,e. 20011. First of all, it runs rich. Today I opened her up from a standstill just for the sake of it, and I noticed that it had left behind a thick black cloud. When I give it some serious throttle, there is black smoke coming out of the exhaust. The bike pulls really strong and is otherwise fine. However, I don't like to have black puffs of smoke coming out of the bike everywhere I go. please

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I've got the same problem, please contact me at I think it's the throttle position sensor

Posted on Aug 24, 2011


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I have trouble with black smoke coming from exhaust and also revs up when at a standstill 2.7 diesel

its running rich as a pig ! (rich = black smoke , unburned fuel)
and idle screams , hot or cold or both? (engine )
no engine stated, we can fix engines unknown.
Gas , diesel, 2.5, 4.0. or bigger engines, name it.?
post the vin and we can decode that. (i can)
the vin decode is in all FSM books made. so , you can too.

rich has many causes.
from lack of tuneups (misfire causes rich)
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map sensor wires fell off
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thermostat stuck wide open engine never gets to full temp 180F

i can list 50 more
do you want to gue$$ or test?
your call, we cant guess what you want to do or what tools you have.

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Suzuki dr 125 1984 running hot on standstill, sluggish when rip throttle back and over heating and spark plug keeps going black any ideas thanks bike hasnt been on the road for 7 years just got it running...

Running hot? Isnt this an air cooled engine? Have you drained the old fuel and put in fresh fuel? The black on the plug tells me its running rich,and that the carb will probably need to come off and be cleaned out. Also,add a inline fuel filter if at all possible.

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Hi. My aprilia pegaso is 1999 650 ccm. the problem is with cooling. On normal steady ride the temperature is rising till approx 70 C', on the same conditions other aprilia shows 60 C'. all liquids...

Hi, Repcys and the usual suspects are:
1. Low coolant level.
2. Restricted radiator air flow.
3. Faulty thermostat.
4. Coolant pump or fans inoperative.
5. Vent hose crimped.
6. Air in the coolant.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
DOWNLOAD 1999 Aprilia Pegaso 650

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