Post up your gas mileage, please

[Mike V]

I believe their 145's.  Can't remember off hand, I'm going to check in the morning and get back to you.

I can't help but think something is not right , did I foul something up? If I was operating this bike at 4,000 feet the way it's currently set up I would be happy.  And 45 mpg with the grades, speeds and agressive riding today?  That's a little suspect too.

[Patrick_Krivacka]

I want to pull my main jet out and see what it is. I don't want to take the carb off, can i just drop the bowl? anything going to fall out? can I check the needle setting with the carb on?

[Bob_Roller]

Remove the float bowl, and I think a 10mm wrench or socket will get the jet removed .

[Patrick_Krivacka]

is there some number I should be seeing? I don't see any. also, one of my plugs looks good, while the other is black and smells of gas.
a note of interest. I never seen such dirty carbs on a running motorcycle.

[Mike V]

iman,

The main jet is shown in the center of the carb (pictured) with the flat washer. The number will be stamped in the exposed face, probably 145.

[Patrick_Krivacka]

thanks mike. I looked again after reading your post, and with the help of two magnifying glasses, I was able to see the 145. I guess i need to pull the top and see where the needle is set, huh?

[Mike V]

iman,
I would suggest measuring the length of the needle where it protrudes from the bottom of the slide before removing it just so you have a check for both carbs and make sure you know where you are during disassembly and reassembly. You should probably be at the #3 position or notch from the top of the needle (counting down). Check with the Bing Manual if you have one. Place some rubber tubing over some needle nose pliars not to damage the needle or put on some rubber gloves to get a good grasp on the needle if you choose to use your fingers. The notches are staggered from one another so twist the needle in 90° increments while you pull on the needle, you'll feel and hear the click of the retainer as you go. Twist the needle another 90° and repeat until the needle is removed from the bottom of the slide. Keep count of your clicks. Try not to bend the needle even though it's plenty tough and resilient. You'll get the hang of it. Be sure both sides are set the same. This link(s) may help -

http://s428.photobucket.com/albums/qq8/gruntyman66/81%20R650%20Restoration/Bing%20Carb%20Left/

http://s428.photobucket.com/albums/qq8/gruntyman66/81%20R650%20Restoration/Bing%20Carb%20Right/




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[Patrick_Krivacka]

thanks mike. you guys are great!

[Patrick_Krivacka]

Ok, I've been thinkin' (look out!). my left cylinder is running rich (black plug/smells of gas.)  what's the best way to cure this? If the needle is in the 4th spot, then there's no adjustment there, correct? so that would mean I'd have to change jets. the right side looks good. Would I leave it alone, or change jets on that side as well? what would this do to my nice tan spark plug? too lean? then what?

[Bob_Roller]

Just move the needle to the correct number three position, if it's not there already .

[Patrick_Krivacka]

to change/check the needle, I'll have to pull the carb? and if I pull the carb, i'll have to re-sync the carbs?

[Bob_Roller]

All you need to do, is to remove the top of the carb, then remove the diaphragm and slide .

Unless you move the adjustment screws, you don't need to do a carb synchronization .

[Patrick_Krivacka]

Thanks Bob. I'll try that when I get home. Thanks for all you do, Bob. Your very generous with sharing your knowledge and experience.

[Barry]

i-man,  If you measure the exposed  needle length before removing or adjusting them as Mike V suggests and you want to check if the the two carbs are set differently you will find the distance between settings is approx. 1.8 mm.

I thought I had the actual measurements for each needle position somewhere but I can't lay my hands on it at the moment.

[Patrick_Krivacka]

that was a good tip, barry & mike, they were different. I moved the shorter one (rich/black plug) a notch, making it longer. I rode the r65 to work today, and it ran great. This is nothing new, it's always run great, but at least I didn't mess anything up. I'll have a look at the plug when I get home and see what it says. thanks again for all the help.