Anybody still remember how to tune a carb?

[IMFASTTOO]

I need to update this...bike is running pretty well. One issue left...after cruising it wont come back down to idle when you come ro a stop unless you force it by lugging the engine in a higher gear and pulling the clutch in. Still have a ways to go but it seems to be doing a lot better

OH by the way a group of Riders from my area went to MAGGIE VALLEY and once there gased up and ALL the bikes had running problems due to the crap gas so BEWARE if your heading that way

 

[Gregger]

The quickest way to check your float height is to attach a clear plastic hose to the float bowl drain. With the hose bent up beside the carb (not enough to kink it), open the drain screw and note how high the fuel travels up the hose. Usually you want the level just below where the bowl attaches to the main carb body. This will tell you if your floats are too high, to low, balanced between sides and can indicate if the needle valve is leaking all without pulling the bowl.

 

[Gregger]

Another way to check your main jet size is to get the bike in 4th or 5th and accelerate hard at WOT with the rpms up there. While accelerating hard, slightly close the throttle. If the bike speeds up slightly for an instant, you are too lean. If it seems to slow down, too rich. The theory behind this is that restricting the air flow slightly will enrich the mixture for a moment if too lean, speeding things up till the fuel flow equalises. Opposite is also true.

This is a good seat of the pants way to set your main jets usually to within 1 jet size without a dyno. The trouble with it is that speeding tickets are expensive.

 

[Claviger]

As hilarious as it is, I never learned to tune one in the first place :O

Good on ya for those who still remember how to do it! Always seemed more magic and religion than science to me.

 

[R3Tex]

Well, magic, religion or luck the bike made a 1000+ mile trip to the sisters last weekend and ran like a top. So dip me in pixie dust and call me a wizard I guess...

 

[Jag]

It seems to me, that into today's world most mechanics are just part changers led by info given to them by the onboard computer!! When you find a real mechanic that has skill, patience, and trouble shooting ability, then you have a real mechanic that is worth his weight in gold!! Modern technology as nice as it is, has dumbed us down! Yet another skill lost to modern technology! Learning to do it yourself with the help of websites like this, is the way to get it done!

 

[EasTexRIII]

It seems to me, that into today's world most mechanics are just part changers led by info given to them by the onboard computer!! When you find a real mechanic that has skill, patience, and trouble shooting ability, then you have a real mechanic that is worth his weight in gold!! Modern technology as nice as it is, has dumbed us down! Yet another skill lost to modern technology! Learning to do it yourself with the help of websites like this, is the way to get it done!

Amen

 

[WyldCFH]

Well, magic, religion or luck the bike made a 1000+ mile trip to the sisters last weekend and ran like a top. So dip me in pixie dust and call me a wizard I guess...

What size is that Yamaha anyway? 650, 950, 1300?

From what I saw, Katie rode **** good for a new rider. No downs on the sisters is commendable.

 

[R3Tex]

Yamaha is an 1100