Question about 2002 Yamaha Drag Star Four

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No start

My bike ran well yesterday until the throttle linkage to the left card fell off. So I fiddle around and reattached the throttl eto the carb. While I was doing this I didn't set the valve to off is it possible that I flooded it? I tried tonight again and still no start. Also, my bike has a battery but no electric start just a kickstart. Would the battery cause the bike not to start? Please help

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If it has a vacum petcock you probally didnt flood it. but anythings possible. check for spark,fuel and compression. these are the basics that a engine needs to start.

Posted on Nov 10, 2008

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1 Answer

1980 suzuki gs550 Which is the throttle linkage and which is choke linkage?

The choke linkage moves back and forth left to right.
The throttle linkage is in the center of the carbs and pulls a pulley that turns the throttle butterfly plates.

Jun 22, 2014 | Motorcycles

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Yamaha 82 model XJ650: Throttle cable will not move. Disconnect cable from carb linkage and cable works freely, no resistance. However, if reconnect to linkage, throttle will not move. Bike has been...

hi sounds like the main spindle shaft that operates the carbs has seized spray penetrating oil wd40 or similar all over the outside of the carbs giving them a good soaking leave for a good few hours
and gently try and wriggle the throttle cable till it starts to move then spray it some more if this doesnt work remove the carbs and clean them out putting penetrating oil inside the throttle bores
you will probably need to take off the lower fuel bowls and clean them out too if its been standing a long time the fuel avaporates away and your left with a lot of corrosion inside that must be cleaned
out as it will block fuel flow through the carbs

Feb 22, 2011 | 1982 Yamaha XJ 650

1 Answer

My wife has a 2002 883 with about 495 miles on it, would like to get running ,but with it sitting so long there is no oil showing in side tank,no signs of oil leak and should carb. and fuel tank be...

Ok, your bike has been sitting for a while. The oil is all in the crankcase. This is a common problem with Harley's that have the tank located higher than the engine. The oil seeps past the check valve in the oil pump.

Take the spark plugs out of your engine and spin the engine with the starter. You need to be careful that you don't burn up the starter. Spin the engine for about 20-30 seconds and then let it sit for about five minutes before you do it again. Once the oil tank is back to nearly full, you can try to start the engine. Do not add any oil to the tank until you get the engine running. You must pump all the oil out of the cases first. As long as there is oil in the tank, you can safely start the engine.

But, if it's been sitting that long, you will probably have to put fresh gasoline in the tank and go thorough the carb before it's going to start. I'd take the carb off the engine and take it to a shop and have them clean (rebuild) the carb. To get the carb off, remove the air cleaner cover, filter, and backing plate. Loosen the throttle cables at the throttle grip. Loosen the large nut on the choke cable near the knob on the left side of the bike and let it swing freely. Remove the cables from the carb linkage and disconnect the fuel line. Pull the carb out of the intake manifold seal being careful not to damage the choke cable.

Installation is the reverse of what I just told you except you must be certain of the correct throttle operation prior to starting the engine. You don't want the engine starting up with the throttle wide open. Make sure it work properly.

Good Luck

Jun 03, 2010 | 2002 Harley Davidson XL Sportster 883

2 Answers

Scooter Open Throttle (?)

Assuming the bike is not fuel injected, you either have a stuck slide, a throttle cable out of place such that it is lifting the slide or a really bad manifold air leak. Tighten the clamps holding the carb to the cylinder and the bolts holding the manifold to the cylinder. That should eliminate any air leaks. Inspect the throttle cable, especially at the ends where it connects. Remove the air filter and look into the center of the carb. Does the slide in the throat of the carb open and close properly? Below is a generic carburetor. Your carb will be similar.


Jun 30, 2009 | 2005 Qianjiang QJ100-2

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Its starts and runs good, but it is not able to idle, i will rev it up to keep it running and it either gets to like a 300 rpm idle for a second or so then just dies, or it will be like it has a stuck...

Assuming you haven't done anything to the carb or cable, the revving up would indicate an air leak somewhere around the carb manifold, either at the head or at the carb/manifold couple.
300rpm is very low for a single to idle at, it should be around 600rpm for reliable idling.
To check for air leaks, spray CRC or WD-40 around the manifold while the bike is idling - you will hear a change in speed.

Jun 29, 2009 | 2002 Yamaha TT-R 250

1 Answer

I need tuning specs for my 1982 suzuki gs 750.

You need to fix the fueling first - without fuel it won't run!
Your other problem sounds like an air leak - either the manifold or the carb. Check by spraying WD-40 or CRC at the manifold and carb join while the bike is running - if the revs change (either up or down) you have a leak.

Jun 28, 2009 | 1981 Suzuki GS 750 L

1 Answer

Honda 1300c backfire through carb at wide open throttle. I have open up the exhust and rejetted the carb . the bike will run fine up to mid throttle or 65 mph but if you accellerate hard or go to wide open...

Try balancing ans syncronising the carbs.
Turn the throttle screw on the LEFT carb one half turn inward. Now start the engine and get it warmed up. With the engine running, remove the RIGHT spark plug wire. Adjust the idle speed on the left carb to the point where the engine just can't quite stay running and dies. Now put the loose spark plug wire back into place.

Now turn the throttle screw on the RIGHT carb one half turn inward. Restart and rev the engine. Next, remove the LEFT spark plug wire. Adjust the idle speed on the right carb to the point where the engine just can't quite stay running and dies. Now put the loose spark plug wire back into place.

Turn the idle screw on each carb EXACTLY ONE QUARTER turn outward and restart the engine. The engine will be probably be idling very fast. Adjust both the idle screws equally from this point to get to the desired idle speed.

Remove the air filter and rubber fittings to allow you to see into the throat of both carbs. You may need a mirror to see inside. You need to be able to see the slides go up and down when you twist the throttle. Now turn the fitting where the cable goes into each carb such that there is just a bit of slack in the cable, 1/16" is plenty. Lock ONE of the cable adjusters down tight. All further adjustments will be made on the other carb.

With the motor turned off twist the throttle very slowly while looking at the slides. Both slides need to begin lifting at the exact same moment. If the slides don't raise at the exact same time then slowly twist the throttle until the locked adjuster slide just barely starts to move. Hold the throttle still and turn the adjuster on the other carb so that the slide on that carb just barely starts to move also. Now recheck the slide movement timing. Do this process until the slides on both carbs begin to raise at the EXACT same moment. Lock down the loose adjuster and re-check the slides.

Please rate this solution. Thanks!

Mar 30, 2009 | 2004 Honda VTX 1300

1 Answer

At 1/4 throttle does not seem to be getting gas and has no power

Has the bike been sitting for anytime ? Is it 'old' petrol ? Petrol goes off unless a stabaliser is used, takes on a jelly appearance and a varnish smell. 1/4 throttle seetings are controlled by air/primary jets and any long lay up of the bike may cause those jets to block up. Try draining the carbs, reseal them and once you disconnect from the petrol tank fill the carbs with a quality carb cleaner and leave overnight (or longer). Drain carbs and reattach petrol line.

Dec 15, 2008 | 1989 kawasaki GTR 1000

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