Question about 2003 Yamaha YZF 600 R thunder cat

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Bike starts up hard wont idle and lack of power

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Have the carbs cleaned

Posted on Aug 01, 2009

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Posted on Jan 02, 2017

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1 Answer

Coughing and splattering


have you had the dispack changed on any of this trips to the mechanic's as it sound to me to be this. it would take around 30 min for it to over heat if it had a fault. then you would get a low spark, no power and eventually just stop working all together.

Mar 24, 2014 | Husqvarna TE 510 Motorcycles

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Losuing over drive lack of power hard starting must hold pedal to the floor


Does it start better after sitting overnight? Is it missing at all? Check engine light? Hard starting could be fuel pump, also lack of power could be lack of fuel. If it starts better after sitting overnight, could be block catalytic converter. That would also explain lack of power. If you have to hold gas pedal half way down trying to get speed would explain why it is not going into overdrive. Hope this gives you some direction.

Jan 04, 2012 | 1996 Chevrolet C1500

1 Answer

Hit the gas and the engine almost dies. Idles and starts fine. Changed the spark plug - no change.


What kind of bike? It sounds like clogged carbs, if pilot jets are plugged from lack of service or sitting for a while then your bike could still start but will fall on its face when opening throttle due to lack of fuel, solution=clean your carbs thoroughly and flush your tank.

Jun 10, 2011 | Yamaha B50 Cross Junior Motorcycles

1 Answer

Starts hard and wont idle, no low end power, has been sitting i'm told, cleaned carb, fresh gas and new plug.


The starting hard and Idling problem sounds like carb needs cleaning. If this bike has moved from a different area it might need different jets in the carb. I might have jumped the gun the gas/oil mix ratio is very important check that first. your spark plug should be a golden brown when mixture and right jets are in. This might resolve the low end power if the oil mix is to rich or you might need piston rings. GOOD LUCK

Aug 09, 2010 | 2003 Yamaha YZ 250

2 Answers

82 GPZ 750 R1 w/ mac 4/1 exhaust Will the lack of exhaust gaskets affect compression?


No

But it will affect how well it idles and reduce your torque due to a lack of back pressure.


May 05, 2010 | 1976 kawasaki Z 750

2 Answers

Hard starting wont idel lack of power


has the bike been sitting without being ran? if so carbs will need cleaned.

Aug 01, 2009 | 1995 Yamaha FZR 600

1 Answer

Bike starts ok runs ok when first started,when temp gets to about 80 degrees,it stalls,runs jerky,wont idle ,lack of power,could it be the T.P.S.


i think the engine oil is the problem.
because i think at above 80 degrees it is loosing its viscosity due to which the piston is slipping inside the cylinder.
change its engine oil .


Jul 12, 2009 | 2002 Yamaha YZF-R1

3 Answers

Bike has been standing for 18 months without the engine being spun. Bike will not start without choke. when choke is off engine stalls


You need to completely drain and refill the gas - the gas you have is stale and doesn't have enough power to run the bike.
The battery needs to be fully charged - not just jump started. It wouldn't hurt to do an oil and filter change as well as a air filter and plug change.

Jul 01, 2009 | 1995 Yamaha FZR 600

2 Answers

Lack of power to klx250 have been told how to fix


The stuff you are being told is not the best advice.Leave the small "trick" stuff alone. If you want to add real power then have a cam shop build up and regrind your OHC for more radical cam timing.
The bike will wax the competition. Don't go so far that the bike idles a a lope or is hard to start. Just have them grind for something hotter than stock.

Please rate this solution. Thanks!

Apr 03, 2009 | 2007 kawasaki KLX 250

1 Answer

2005 CRF450R Hard to start and wont idle


Hi
I would suggest that you have the valve clearances checked.

Also, check that the carb is clean. Pay particular attention to the PILOT JET as this opperates the idle circuit.

Jon

Mar 03, 2009 | 2005 Honda CRF 450 R

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