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When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws. But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position. Be sure to mark the turns down on a piece of paper. That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their original position before you started. Make sure your spring that goes on the idle screw is in place. You can also use some "locktite" thread locking compound on the threads of the needle if the spring is missing. Normally you will adjust your idle jet to 1/2-3/4 turn open from the bottom seated position. Then you will re-adjust the low speed of the engine when the engine is warm by turning the idle screw in or out till the engine runs smoothly at idle speed, around 1200 RPM. The high speed jet is adjusted to 1 1/2- 1 3/4 open from the bottom seated position, after the engine is warm. Then re-adjusted by turning the High Speed jet adjustment screw in or out till the motor runs smoothly at high speed. Alway use the "lightly seated" method if you have not changed the screw settings. Please take time to rate me Bud
If you look just under the upper frame rail on the left side under the fuel shutoff valve there should be a plastic knob on the end of a cable in a hook shaped clip. This adjusts the mechanical idle. Correct idle speed is 1100 RPM.
I can share with your sentiment there. Here's are some of my ideas, you'll need to be patient enough though.
the jets you used, is it the stock replacement or a bigger one? I would recommend using the stock jets to eliminate the possibility of it being the cause. Tune your engine using a timing light, synchronize the carburetors so each intake manifold receives the same amount of fuel on throttle. Drain the fuel form the carb reservoir (or clean the whole carbs including the jets). Adjust the air-fuel mix to standard or 2.5 -3.5 turns out. Check for hose dents and check for proper plug firing.
Make sure cylinder compression is also good otherwise you'll suffer power loss on peak RPMs at high speeds.
The above process should eliminate any possibility with regards engine idling and poor idling.
To answer your question regarding valve clearance you'll need to download the manual to assist you on dissassembly. You'll need to remove the top cover on the engine and use a feeler gauge for adjustments. I'm not sure how to find the TopDeadCenter of this particular bike but the manual should.
Being electronic ignition, the timing should not be out.
It is more likely there is tight valve clearances, this will cause backfire and poor fuel economy and poor idle. also if it is not corrected it can burn valves and seats.
solution
full tune and service with valve adjustment.
See if there is a Philips-head set screw on top of the carburetor (it is the idle speed adjusting screw) that you can turn counterclockwise backing off the idle (and possibly the wide-open throttle) speed. This is the simplest solution for you unless you wish to remove, disassemble and inspect the carb. Also, check the throttle cable to the carb, make sure it is not hanging up or binding near the engine where it connects onto the throttle plate shaft of the carb.
Increase your idle speed at the fuel/air intake manifold. There should be a screw to allow for this adjustment. If that fails the engine timing may be off and should vbe reset to stabilize idle speed.
yes this can be replace without removing the carbs and it goes at the rear of the carbs reach your hand through the fairing and it goes on the throttle stop
you will need to feel with your hands
First take a screwdriver and make a sign on it.Check and note how many turns are at Low speed ."L" adjustment.Then adjust High speed "H" at half a turn less than "L".Idle speed "T" adjust accordingly. Start the engine.
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