Question about 2001 Aprilia Pegaso 650 i.e.

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Aprilia pegaso 1998, intermittent misfire, sometimes runs fine, then othertime fails to rev above 2500rpm? I've stripped the carbs and cleaned everything... Good fuel supply, good spark, new air filter...... what next?

Posted by Anonymous on

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Hi Anonymous, and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals especially the ground cable at BOTH ends ignition coil or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in the fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor or intake seals.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust valve.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
DOWNLOAD 1998 Aprilia Pegaso 650

Posted on Oct 21, 2015

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Posted on Jan 02, 2017

  • 2712 Answers

SOURCE: Does your Pegaso Overheat?

meaning that they all overheat. just want to check with you guys if it happens to you too. thx Only in slow heavy traffic (or at very slow speed AND in very hot weather) but if the fan works alright do not worry. It should get cooler as soon as you start riding normally again, i.e. around 20/30 mph. ,,,

Posted on Nov 10, 2008

Pristonero
  • 119 Answers

SOURCE: hi, my aprilia mx 125 2007 started to smoke alot

check and adjust your valve seal

Posted on Sep 22, 2009

  • 20 Answers

SOURCE: the fuel pump stops working regulary on the 650

try to meet a mechanic & tell the probilam .after that plse try to fintout a second handfuel pump fitted approx & fix the probilammoz-screenshot.png

Posted on Mar 21, 2010

  • 440 Answers

SOURCE: aprilia habana cutting out and starting problems

Did you clean the pilot & main jets in the carb & set the float height to standard? There is also an over flow in the carb which should stop fuel flooding into the air filter - did you check?
Make sure there are no splits in the fuel pipes & the smaller vacuum pipe that goes from the side of the auto fuel tap, also check pipes connect well
By your description it sounds like the carb is filling very slowly, 1 bowlful would get you around 2 miles & then plug would be dry when trying to start it, leaving it overnight the carb would fill up & flood air filter due to a leaky fuel tap

Ride safe
Bike-Doc
Please mark this as very helpful (if it has been!!)

Posted on Apr 22, 2010

  • 1 Answer

SOURCE: aprilia 650 pegaso strata fuel pump problem

Gidday from New Zealand!!!! did anyone find a way to resolve this problem? I took my pump in to the workshops and their was two other Aprilia pumps there ( one was from another Strada 650) with the same fuel starvation symptoms. I have changed my filter twice in the bikes 46000km, the contamination reminded me of black rubber, could this be from the pump? Look forward to hearing from anyone. Thanks

Posted on May 29, 2010

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