Question about Yamaha XT 660 R Motorcycles

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Have completely rebuilt carburetor for 2001 yamaha raptor. Won't start and one side is flooding into overflow what am I missing

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It sounds like one of your floats is not functioning properly and may be stuck,have a hole in it,or perhaps the float drop is too large allowing more fuel than needed to come through the system. Regardless you are not going to like this answer.They will have to come off and be checked and cleaned again. I've done a set of carbs as many as three times to get them right so I feel your frustration. Bottem line is they are frustrating,annoying,and fiddly,and they are either right or have to be done again. Compressed air is handy to help you blow out the tiny grot,and so is a set of needles to clean the emulsion tubes (if equipped). Good luck and be patient!

Posted on Dec 29, 2010

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Posted on Jan 02, 2017

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My son bought a Yamaha 660R Raptor and the wiring is a complete mess through out the entire chassis. I am looking for a wiring diagram to straighten it out.


hey Tom.
get this manual.. OR get a FACTORY service manual from your local dealer.... this will be invaluable later...

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1 Answer

No gas in the float bowl of carburetor


Hi, Anonymous always check fuel flow first to isolate the problem area otherwise the usual suspects are:
1. Fuel tank empty.
2. Fuel cap or fuel tank not venting properly.
3. Fuel filter clogged with rust or dirt.
4. Fuel valve/petcock not in the on or reserve position.
5. Vacuum line to fuel valve cracked, broken, pinched, or missing*
6. Fuel valve/petcock clogged or diaphragm cracked, cut or torn*
7. Fuel line from the fuel valve to the carburetor or fuel pump clogged, cracked, pinched, bent, broken, or missing.
8. Fuel pump not working*
9. Fuel line touching cylinder or head causing fuel to boil and vapor lock, repair by rerouting and wrapping line with convoluted tubing.
10. Carburetor inlet clogged.
11. Carburetor float or needle and seat stuck.
12. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.
* If equipped or applicable.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
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1 Answer

No gas in the float bowl of the carburetor.


Hi, Anonymous always check fuel flow first to isolate the problem area otherwise the usual suspects are:
1. Fuel tank empty.
2. Fuel cap or fuel tank not venting properly.
3. Fuel filter clogged with rust or dirt.
4. Fuel valve/petcock not in the on or reserve position.
5. Vacuum line to fuel valve cracked, broken, pinched, or missing*
6. Fuel valve/petcock clogged or diaphragm cracked, cut or torn*
7. Fuel line from the fuel valve to the carburetor or fuel pump clogged, cracked, pinched, bent, broken, or missing.
8. Fuel pump not working*
9. Fuel line touching cylinder or head causing fuel to boil and vapor lock, repair by rerouting and wrapping line with convoluted tubing.
10. Carburetor inlet clogged.
11. Carburetor float or needle and seat stuck.
12. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.
* If equipped or applicable.
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.
http://www.starmotorcycles.com/assets/service/manuals/2003/LIT-11626-16-05_22.pdf
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1 Answer

If I remove a yics plug from one side and prime with fuel, the engine will start and idle until prime is burnt. Why will fuel not flow. New tank, new peacock, rebuilt carbs, new gas


Hi, Burns193 always check fuel flow first to isolate the problem area otherwise the usual suspects are:
1. Fuel tank empty.
2. Fuel cap or fuel tank not venting properly.
3. Fuel filter clogged with rust or dirt.
4. Fuel valve/petcock not in the on or reserve position.
5. Vacuum line to fuel valve cracked, broken, pinched, or missing*
6. Fuel valve/petcock clogged or diaphragm cracked, cut or torn*
7. Fuel line from the fuel valve to the carburetor or fuel pump clogged, cracked, pinched, bent, broken, or missing.
8. Fuel pump not working*
9. Fuel line touching cylinder or head causing fuel to boil and vapor lock, repair by rerouting and wrapping line with convoluted tubing.
10. Carburetor inlet clogged.
11. Carburetor float or needle and seat stuck.
12. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.
* If equipped or applicable.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
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1 Answer

Yamaha Grand Axis 100 not getting fuel to carburetor


Hi, Anonymous always check fuel flow first to isolate the problem area otherwise the usual suspects are:
1. Fuel tank empty.
2. Fuel cap or fuel tank not venting properly.
3. Fuel filter clogged with rust or dirt.
4. Vacuum line to fuel valve clogged, cracked, pinched, bent, broken, or missing*
5. Faulty vacuum line switch/relay
6. Petcock clogged or diaphragm cracked, cut or torn*
6. Fuel line from the fuel valve/petcock to the carburetor clogged, cracked, pinched, bent, broken, or missing.
7. Vacuum lines to the mechanical fuel pump clogged, cracked, pinched, bent, broken or missing*
8. Faulty electric fuel pump and or wiring*
9. Fuel line from the fuel pump to the carburetor clogged, cracked, pinched, bent, broken, or missing*
10. Carburetor inlet fitting clogged.
11. Carburetor float and or needle and seat stuck.
12. Carburetor overflow line clogged, pinched, or bent.
13. Vacuum line from carburetor deacceleration valve not zipped tied*
* If equipped or applicable.
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 wonderful day.
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2 Answers

2001 raptor 660 won't idle, only runs with choke on, an won't take throttle???


need your carb rebuilt or your carb readjusted. sounds like you might have some mud in it. do you take it in the mud? if so check the top where the throttle cable comes through.

Sep 22, 2012 | K and N Filters Powerlid 2001-2005 Yamaha...

1 Answer

I just rebuilt my carburetor to my 2001 Yamaha yzf r1 and I need to adjust the carburetor needles about how many turns do I need to do starting from the left side of my carburetor?


Hi, Tazz for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. 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.
http://www.r1-forum.com/forums/4-mechanical-help/41018-carb-settings-2001-r1.html
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http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

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1 Answer

Raptor 80 fuel leak


Sounds like its time for a float level adjustment - BETTER YET - complete carb cleaning and setting by a qualified professional...

Aug 05, 2017 | Yamaha 2005 Raptor 80

1 Answer

I have a 03 Yamaha 660 raptor one of the carbs


Did you reset (adjust)the float inthe float chamber to tht carburator which is leaking ?
You will probabley have to adjust tht float to stop from overflowing in other words we call it flooding.
Check the float pin of wear at the tip.
Hope this helps!

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2 Answers

Why is gas bypassing the carburater and coming out of the air filter port from engine block on my 01 660 raptor?


check the carburetor breather line for obstructions ( a usually black hose), this will cause fuel to rise into your airfilter. could also be that your floats are messed up. check a yzf forum on how to inspect and adjust these

Jan 24, 2010 | 2001 Yamaha YZF-R6

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