Soviet Steeds

Does anyone know of literature regarding the CVK32 carbs, or would anyone be willing to give me a breakdown of the functions of the carb. I mean, I'm not a total idiot when it comes to carbs...but I would like to know more.

Other then gaining knowledge, I do need to solve why my left carb is popping when I slow down. I have the idle screws matched as far as I can see, and the idle mix set to standard 1.5 turns, I've tried more/less turns on the mix screw and that doesn't help. The compliance fittings seem to be in good shape as well.

So if any ural-pro's would like to share some insight it'd be greatly appreciated.

get a twinmax, the screws settings you read about only get you close, a twinmax will synk the carbs and get you dead on.

here is the carb breakdown/info you requested
http://myural.com/keihin_32cvk_disassembly.htm

Yeah I've thought about getting the twinmax, maybe when I get some spare money.

I went through the carb dis-assembly on the site a few months ago so they should be in good shape.

Everyone has a different opinion on this, but my CVK32 carbs drove me nuts in 2002 and I bought 2 K-68 carbs and have never looked back. This year I replaced the old k-68's carbs with 2 new k-68's.
I still use a twinmax to dial them in.
NO MORE LEAKING COMPLIANCE FITTINGS!!

Here is an excellent link that will tell you almost everything you need to know about the carb, albeit a 40MM.

http://www.gadgetjq.com/keihin_carb.htm

If you don't have a lot of money to play with jetting, I would get yourself 1 to 4, 2mm stainless washers and insert them (max two each side) under the needle jet on your carb. This mod made a huge improvement with popping on decelerating on my bike, even before I made my airbox mod. Just remember, when you take the diaphragm out, let it sit for a while to air out, as it can be hard to re-install while saturated with gas.

Do a search on needle shim and see what you find.

don´t have money? use this!
I have the same and it work.
http://www.motoguzziclub.co.uk/tech/how ... ometer.asp


than I ordered colortune plug on ebay - it seems good - it is 14mm version - this is good site about it + videos -
http://www.gadgetjq.com/ctune.htm

and finally - I think here you can find good hints for tuning/setting your carb - CV carb tuning procedures -
http://www.factorypro.com/tech_tuning_p ... gines.html

and Harley forum about cv carbs -
http://www.hdtalking.com/fuel_and_carb_related_issues/

and here is russian video of synchronization -


and here is some bmw with "oil" manometr -

Here's a manual and exploded view diagram I found on the CVK carbs.

Sometimes the "popping" on decceleration can be casued by other things such an exhaust leak.

Agree with Johnny...if all is in order with the carbs...then (1) look at the "J" pipes coming off the head. On the 2002 engine, they are a press fit, if they are loose and sucking air on deceleration...you'll get a pop, pop. (2) Check the union nut at the J-pipe/muffler junction, if loose you'll get the same.

Loosen hanger clamp on J-pipe (need to remove cylinder bar on left side) and tap pipe in with a hammer/mallet at the apex of the 90 bend to seat. If you so desire you may, remove pipe and slather each end with red RTV sealant (both pipe/cylinder boss and muffler) and then tap the pipe in.

Just grab the J-pipe when cold and see if you can move/rattle it. If so, do the above. If not, you don't have the carbs set up correctly or have a problem in the innards of the offending carb.

The idle mixture screw (forward and underneath the carb.) only affects the first 1/4 of throttle...so if you are coming off throttle when popping occurs...you problem is not with the idle circuit.

Last, never trust the advice given by a guy wearing latex gloves in a maintenance video.

Also check your valve tappet clearances. An overly tight exahust valve may exhibit the same symptom.

Wow, thanks for all the input! I have quite a bit of reading and tinkering to do now.

Thanks!

nemec wrote:don´t have money? use this!
I have the same and it work.
http://www.motoguzziclub.co.uk/tech/how ... ometer.asp


than I ordered colortune plug on ebay - it seems good - it is 14mm version - this is good site about it + videos -
http://www.gadgetjq.com/ctune.htm

and finally - I think here you can find good hints for tuning/setting your carb - CV carb tuning procedures -
http://www.factorypro.com/tech_tuning_p ... gines.html

and Harley forum about cv carbs -
http://www.hdtalking.com/fuel_and_carb_related_issues/

and here is russian video of synchronization -


and here is some bmw with "oil" manometr -

I made one like this but put motor oil in it. My thinking being that if things got a bit out of hand I would rather have oil sucked into engine than water. The advice I got suggested using a yard stick and filling tubing with oil to about the 27 inch level.

nemec wrote:don´t have money? use this!
I have the same and it work.
http://www.motoguzziclub.co.uk/tech/how ... ometer.asp


than I ordered colortune plug on ebay - it seems good - it is 14mm version - this is good site about it + videos -
http://www.gadgetjq.com/ctune.htm

and finally - I think here you can find good hints for tuning/setting your carb - CV carb tuning procedures -
http://www.factorypro.com/tech_tuning_p ... gines.html

and Harley forum about cv carbs -
http://www.hdtalking.com/fuel_and_carb_related_issues/

and here is russian video of synchronization -


and here is some bmw with "oil" manometr -

Built That Manometer last weekend but used Marvel Mystery Oil as the fluid. Finally got a chance to use it today after riding home from work.
Now I thought I had the carbs fairly well set until I started it up,damnear sucked the oil into the rt. carb.
Got it all balanced nice.
Note: both idle screw and cable adjustments are VERY sensitive so only go a tiny bit at a time.
It is much smoother now and will do a cold start check tomorrow.
I still need to re-jet so this was just practice!

Re-jetting does not require resync'ing.

BillyG wrote:Re-jetting does not require resync'ing.

Yea, I know,but just got to go thru the steps.
I'm That nutty....