Question about 1985 Suzuki GSX 550 EF

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Bike will not idle at revs stated in the manual and the knurled nut used for setting correct idle doesn't seem to do anything.

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Clean the carbs dip them in carb cleaner replace the rubber o rings

Posted on May 18, 2012

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SOURCE: Bike starts & idles, but

Sounds like the main jet in the carb is clogged, pull it and take a look, clean it our with fine copper wire and some gas.

Posted on Apr 13, 2011

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1 Answer

Tickover to high


Idle should be about 1000 to 1100. There is a black, knurled knob close to the carb or throttle body where you can turn the idle speed down.

Apr 06, 2014 | 2011 Benelli Tornado Tre 903 RS

1 Answer

I'm helping my son-in-law fix a 1981 Z250. How do you adjust the clutch? It seems a bit wishy-washy!


It's only a 250 so it'll feel light to the touch. On the handlebar lever there is a cable attached with a slotted knurled nut, this can be adjusted to add about 1/8th free place before some tension is felt. If not tension is felt and the lever just flops then the clutch is way out of adjustment tighten it up,
Normally this Knurled nut (it's actually a round grooved nut you twist or screw using your fingers) has a full adjustment range from the lever to completely unscrewed of about 1.25 inches

Adjust the "free play" to about an 1/8th as explained if this doesn't help then internal clutch work is needed and best left to those that work with motorcycle and not a novice.

May 03, 2011 | 1981 kawasaki Z 250 C

1 Answer

I have a 2003 Victory Vegas 92cc it is idling too fast or idles too high.. there is a choke type switch on it.. ( to be used on cold mornings or when first starting up bike) and now it doesn't matter...


First, roll back the black rubber covers on both throttle cables. One of them is the idle (I think bottom, but not sure). Loosen the jam nut so you can adjust the tension - do not use pliers for this, at the least you should use crescent wrenchs, and the best thing would be to have the correct size wrench. The easiest way to know if you're doing it correctly is to have the bike running while you do this. Turning it one way will cause the idle speed to slow down, turning it the other will speed it up. I think you want to shoot for the 1000 RPM mark. Once you have it idling where you want it, tighten the jam nut back up. Doesn't need to be locked down with superman force, just nice and snug. Roll the rubber boots back up and take her for a spin. Let me know if you have any questions.

Apr 12, 2011 | 2003 Victory Vegas

1 Answer

I have a Kawasaki Ninja, ZX6r, 1997 F3. The bike starts great and rev's great when standing. At high rev's its as sweet as a nut. The problem seems to be when riding the bike and the revs are below 4,000....


There are adjustments on carbs for low speed air intake (air mixture screw)find out factory settings and reset that mixture.Sounds to me like those adjustments are out of sink.If so the bike will run very bad from idle to about 1/4 throttle then run great from there up to full throttle.this definitly sounds like carb problem.

Mar 13, 2011 | 1997 kawasaki ZX-6R Ninja

1 Answer

Front forks loose


Without more info, I can't tell if you mean you have a loose head-set (that's the vertical tube that holds the bearings that turn when you steer), or if you have a mountain bike with springy front forks and the springy part is loose. If it's the springy part, you'll probably have to replace the whole front fork. If's it just a loose headset, you can tighten it pretty easily. Look at the top of the headset while you turn the handlebars back and forth (as if steering). Looking at the top of the headset you will see (from bottom to top) a knurled ring, a washer, and a large nut. The nut is a lock-not which is isolated from the knurled ring by the washer. The washer has a tab on the inside that prevents it from rotating. Tighten up the knurled ring by hand (you might have to lift up on the handlebars a bit to take the pressure off of it). Don't over-tighten the knurled ring or you won't be able to steer. Then tighten the lock nut with a wrench. Good luck

Oct 04, 2010 | Cycling

1 Answer

My 2000 suzuki katana has a high idle when its hot


This is a fairly common problem with performance bikes. The problem comes from your thermostat. The thermostat is designed to open and close at a certain temp. What I suspect is happening is that your thermostat is opening too early for the bike to get to operating temp, hence the long time to warm up. Once you open up the bike warms up and the oil viscosity thins to operating temp and the engine revs more freely. Now your idle screws are set for a "cold" bike and revs high.

The other side is that the oil you are using may not be designed for your bike. Often people put performance synthetic oils in their bikes to perform better, but the production bikes are designed for thicker oils. Oils like 5w40 will be very thin allowing your bike to rev faster due to thinner oil, but you are causing extra wear on the parts due to less oil barrier.

First I suggest make sure you have the correct spec oil for you bike, then check that you have the correct thermostat in your cooling system. A performance bikes usual operating temp is between 95-105 deg C. This means your thermostat should only open at about 88deg C to start the regulation process.

Sep 17, 2009 | 1993 Suzuki GSX 600 F (Katana)

4 Answers

Engine revs when turning right.


Wrong size throttle cable or misadjustment. At the handlebars, I've seen some set that acceleration causes a pull of the cable, I've also seen bikes set to push the cable. Confirm this is set correctly, and that your mechanic used the correct legnth of cable.

Jul 30, 2009 | Yamaha XJ 650 Motorcycles

2 Answers

I have a 1997 FLHRI The bike wants to rev and runs hot


I guess the guy above does not know that FLHR-I means injected no carb anyway..You problem is a heat sensor. Its reading cold when the bike is heated up an should be kicking down. Its on the back of the front jug left side. Unscrew it and replace it. Easy fix.

Jun 10, 2009 | 2000 Harley Davidson FLHR-FLHRI Road king

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