Question about 1993 Honda NSR 250 MC 21

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Nsr 250 mc21 low on power

Very low on power and has starting problem, does anyone know what could cause this

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You don't give much information on how the bike is running.  But most times when there is a performance decease it is best to clean the fuel system.  Spray some Gum Out or similar product( I prefer Deep Creep and Sea Foam) in the carb. then follow up with some in the tank.  Also change the fuel filter.
  

Posted on Jan 05, 2009

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Hi there, I have a Honda nsr MC21. I have been told that my crankshaft bearings/seal has gone. The bike wont start, if I spray/leak a little fuel directly into the carbs, it starts like a dream. I was told...


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Jan 04, 2009 | 1993 Honda NSR 250 MC 21

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I have a 1993 Honda NSR 250 2 stroke and it seams to run fine until i lean it to the rite and when i do it cuts out with the oil light flashing on for a split of a sec can you tell me what this is


Hi and welcome to FixYa,

You have two (2) concerns and are interrelated to each other:
  • lean right, oil light comes on - the 2T oil reservoir on most NSR designs would be attached to the right side, relatively high on the frame;
  • on leaning towards the right, the contents of this reservoir would be displaced because of the angle. The 2T oil level sensor/switch would erroneously sense low or no 2T oil condition while thus leaned;
  • this sensor/switch marked "Oil Level Switch" is connected to two (2) wires Green/Red and Green (ground);
  • the false "low or no 2T oil" would trigger the "Low Oil/Ignition Warning" light to glow red; simultaneously
  • the other Green/Red wire would go and trigger the PGM-III to switch OFF, hence the engine cutout.
Solution would be to fill the reservoir with appropriate 2T oil.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.

Nov 27, 2008 | 1993 Honda NSR 250 MC 21

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