R65 bing carburator standard idle jet

[Adamastor]

Hi there,

done some miles since I repaired the bean can, but unfortunately my plug keeps wet:




This plug only has about 50km (30 miles) on it, and is quite wet. I have always been worried about the carb, because the mixture screw acts like the mixture is too rich (and it might be), but looking at this plug maybe my main problem might be too much oil.
I just blocked the oil from the crankcase breather to the left carb to see if that helps.
If not, could this happen because of new rings or do I need to change my valve guides? There is also quite a bit of oil consumption, but that also happened before the new rings.

Meanwhile, I saw a NOS left Bing carburettor with a good price on ebay, and won that auction. It might arrive next week and help me eliminate the carb issues from the equation.

About the timing: the image is not very clear, so I must assume the chain also needs to get replaced. I will however leave that for some later because first things first... (and there's always something more to look at)

Any helpful ideas are very welcome, and I ll keep you guys posted on my airhead mechanical adventures...

Sergio

[steve hawkins]

Have you got you float height set correctly?

Too much fuel in the bowl and it will find its way into the carb whether you want it or not.

Steve H

[Semper Gumby]

Looks like the chokes are on?  
Either that or the fuelshutoff needles are not working?  
Or the floats are not floating any more.  Take out the floats and put them in a glass of gas and see if they still float.  Probably not it though if there is not fuel dripping out the bottom of the float bowl...  

[montmil]

The "old hands" say that the engine oil level should be maintained mid-way up the dip stick marks. Not filled to the top mark. Can't recall who "they" are but they did say too much oil in the crankcase may cause the odd problem now and then.

Seriously, I'd be suspect of the carb on the wet plug side.

Monte

[nhmaf]

I am thinking now that if your timing chain tensioner - which is basically a plastic block that can wear out - is no longer working well it might also cause enough slack in the chain to cause the timing to appear a little bit jittery?

Usually (but not always) the tensioner makes some horrible sounds if it is worn out.

[Adamastor]

Usually (but not always) the tensioner makes some horrible sounds if it is worn out.

At idle I hear some noise from the front of the noise, but it is not horrible, and could simply be the noise of the chain movement agaisnt the tensioner.
I will buy the new chain kit from motobins sooner or later, because I really dont trust the PO maintenance (from what I have seen on other items on the bike).
After that, maybe I could buy new valves and have the heads reconditioned...
That would make the bike fully dependable and ready for lots of km, right? I use this R65 on daily basis...

About the other tips:
- I will buy new carb needles the next order I make to motobins, but never had fuel dripping from the carb bowl
- I only filled oil to max the first time I got the bike, now I fill her to 1/2 or maybe 3/4... never more than that and usually only 1/2.

The weather is not very good, but I plan to do a small journey today to speed up the new rings break in. I have only new rings on the left side... should I have changed the right side too? Compression is/was great (145psi) on that side so I thought "dont fix it if it aint broken"...

[montmil]

... I have only new rings on the left side... should I have changed the right side too? Compression is/was great (145psi) on that side so I thought "dont fix it if it aint broken"...

"dont fix it if it aint broken" ... often, good words to live by!

I would not think the engine will be angry with you for changing piston rings on one side only. With compression readings now close to identical, your engine is feeling good. Ride on.

It's the carbs. It's the carbs. It's the carbs...    Your mantra for the month

Monte

[Adamastor]

Just came back from a very nice (yet very cool weather) ride on twisty country side roads... about 220km (140 miles) ridden and it all went well...  

At about half the trip I stopped to check the sparkplugs and oil level. I thought I would, as usual, find a left spark plug almost fouled, but....   No!
The ceramic was white, and the metal border gray/black.. on both plugs!
The oil consumption is still high, It consumed about 200cc on 140 miles...

This ride was mostly made between 3000 to 4500 rpms most of the time, and not nursing the throttle (snowbums says you should not nurse it on ring break-in or break-in will never finish). (I'll post some photos later)

I am crossing fingers that all is ok now, but would also like to know what was wrong. What have I done lately?
. re-centered butterfly (was not that bad before adjusting)
. re-checked valve-gaps
. "refurbished" the bean can (now it has advance)
. blocked oil from engine breather to left carb. It is directed only do right side carb...

What do ya think of all this?

[montmil]

 What do ya think of all this?

Ya can't argue with success [smiley=thumbsup.gif]

[Barry]

What do ya think of all this? Smiley

Perhaps a combination of blocking the engine breather to the left carb and the rings starting to bed in a little. Keeping the revs up must have helped too.  

Hope it continues to improve for you.