Question about Yamaha XT 660 R Motorcycles

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Won't rev up

Will only rev up so far then it cuts out

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Most likely clogged main jets or a clogged fuel/air filter.

I would chech the fuel filter and air filter first

Posted on Jan 26, 2009

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Hi, my little boys 50cc mini kolt will not rev up enough to go. Guessing this is air flow problem as if the choke is switched on it cuts out completely.


Hi, Clare and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
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6. Float needle is not seating.
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On my dt 125 road bike but wen i start it an rev it sputters an cuts out


Hi, Anonymous and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
For more information about your question and valuable "FREE" downloads that you will need please visit the website below. Good luck and have a nice day.
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http://www.motogelnar.cz/manual/YAMAHA/DT125X_RE-05-Service_Manual.pdf
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Jun 22, 2014 | 2000 Yamaha DT 125 R

1 Answer

125 DT Yamaha won't rev up in higher RPM


Hi, Anonymous and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
dt175 won rev above 7k Yamaha 2 Stroke
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http://www.motogelnar.cz/manual/YAMAHA/DT125X_RE-05-Service_Manual.pdf
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May 28, 2012 | 2000 Yamaha DT 125 R

1 Answer

I have a 2007 suzuki C90 anyone know of any enexpensive way to get a little more power out of it I already have cobra pipes and a fuel management system on it have


Apart from going full tilt and bombing the engine. I might suggest putting an aftermarket air cleaner on it. Either a hypercharger or an Arlen Ness kit, maybe even spiked air ram. Either of these will give you extra performance.
I have a VZ1600 with PC III, Cobra slash cut pipes and a Hyper charger and it really pulls hard and goes far faster than a stock bike. At 80km/h in first there is a rev limiter that prevents you going over that, but second so far I have had it up to 130 km/h and still more throttle to go.

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1 Answer

My gilera runner revs so far (about 30mph) boggs and revs bogs and revs etc. help


Do you have a sports exhaust fitted? If so,try it with the standard exhaust,see if its any better

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2 Answers

My bike will idel but won t rev. just cuts off


Starving for fuel.
Make sure carbs are getting fuel.
Make sure fuel filters are clean,
make sure fuel pump is working.

If carbs are getting fuel but wont rev, you need to clean your carbs because your jets are clogged

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1 Answer

Starts up okay but when to try and rev it dies and cuts out


Try checking your carb ,the main jet might be in need of a clean.

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Brief injection cut al low revs


Most likely a timing issue, possibly a fuel issue see your mechanic.

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Engine cuts at 10000rpm


this is your rev limiter kicking in, is it affecting your ability to gain speed? although it aseems to be kicking in a bit premature. maybe your tach is off and its a normal rev limiter. if not try to change your plugs and fuel filter and air filter

Jan 19, 2009 | 1999 Suzuki GSX-R 750 X

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