service manual for the Keihin CVK34 carb? - Ex-500.com - The home of the Kawasaki EX500 / Ninja 500R
 
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post #1 of 18 (permalink) Old 9-25-2012, 1:31 PM Thread Starter
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service manual for the Keihin CVK34 carb?

Anyone have a link to the carb service manual? I see some download sites online, but don't trust them. I'll also checked Sudco, eBay and the Keihin site, but no joy. Thanks, Rick
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post #2 of 18 (permalink) Old 9-25-2012, 4:56 PM
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Re: service manual for the Keihin CVK34 carb?

I would have thought Sudco would have something. I know they have a nice manual for Mikuni's, I have bought the past few editions. What is it you need to know?

Bikes: 2003 Bandit1200, 1974 RV125, 1972 TS250 Racer<br />Previous: 1992 EX500, 1998 EX250, 1988zx600c, 1990 XT350, 1988 RM250
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post #3 of 18 (permalink) Old 9-25-2012, 5:48 PM Thread Starter
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Re: service manual for the Keihin CVK34 carb?

Me, too, but nothing at Sudco (I have their Mikuni manual). I've got a new-to-me EX500 race bike and want to study up on the carbs and the shop manual I picked up is useless.
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post #4 of 18 (permalink) Old 9-25-2012, 6:30 PM
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Re: service manual for the Keihin CVK34 carb?

Here I write you one.

Take apart clean ,remove pilot jet to be sure it open. close up your done.

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post #5 of 18 (permalink) Old 9-25-2012, 6:48 PM
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Re: service manual for the Keihin CVK34 carb?

I never hear anything about the CR round slides on here. No performance gains? No better throttle response? or do people just not know about them? Same goes for FCRs or Mikuni RS. I dont think there is a plug and play kit for FCRs or RS's for the EX but I would assume someone has tried them. There sure is a lot of stupid modification / money wasting from people on this forum that I would think better carbs would come before leds, turbos, and body kits?

Bikes: 2003 Bandit1200, 1974 RV125, 1972 TS250 Racer<br />Previous: 1992 EX500, 1998 EX250, 1988zx600c, 1990 XT350, 1988 RM250
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post #6 of 18 (permalink) Old 9-25-2012, 7:25 PM
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Re: service manual for the Keihin CVK34 carb?

Better Carbs

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post #7 of 18 (permalink) Old 9-25-2012, 7:35 PM
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Re: service manual for the Keihin CVK34 carb?

Quote:
Originally Posted by FOG
Better Carbs

FOG
Are you saying that the CVK is the best motorcycle carb in the world or are you saying that its the best carb for the EX? I am just curious on why we dont hear more about other carbs, like its not even a thought that enters ones head?

Bikes: 2003 Bandit1200, 1974 RV125, 1972 TS250 Racer<br />Previous: 1992 EX500, 1998 EX250, 1988zx600c, 1990 XT350, 1988 RM250
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post #8 of 18 (permalink) Old 9-25-2012, 8:11 PM
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Re: service manual for the Keihin CVK34 carb?

Not EX, but I'm currently saving for a FCR rack, a known performance upgrade within the Duc community, a rather expensive upgrade at that.




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post #9 of 18 (permalink) Old 9-25-2012, 10:52 PM
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Re: service manual for the Keihin CVK34 carb?

When you say better Carbs You must ask "for what" CV carbs exist to cure the problems inherent in flat or round slide carbs. Just like a Four barrel they combine a small opening for good low speed throttle response and a large bore for best top end HP.
None better for street.

Racing is a different topic all together and many tuners make good and bad decisions regarding carbs. Frankly the current crop of factory hotrods all use CVs.

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post #10 of 18 (permalink) Old 9-26-2012, 6:33 AM
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Re: service manual for the Keihin CVK34 carb?

Quote:
Originally Posted by caddisls
I never hear anything about the CR round slides on here. No performance gains? No better throttle response? or do people just not know about them? Same goes for FCRs or Mikuni RS. I dont think there is a plug and play kit for FCRs or RS's for the EX but I would assume someone has tried them. There sure is a lot of stupid modification / money wasting from people on this forum that I would think better carbs would come before leds, turbos, and body kits?
I couldn't agree more that this forum is quickly turning into an led light mod forum. That and which noisemaker is the best.

And we all know the ex500 community generally speaking doesn't have two nickles to rub together.
I've never even imagined a more frugal group of people in my life.



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post #11 of 18 (permalink) Old 9-26-2012, 8:58 AM
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Re: service manual for the Keihin CVK34 carb?

I'm far from an expert, but it seems that these are budget bikes without many easy upgrades that significantly increase power. For most parts, the question "What _____ should I upgrade to?" is answered with "There isn't really anything that performs better than stock." Based on what people like FOG say, there simply isn't that much headroom left in the engine for increasing performance; it's not that the ____ is too small, it's that the engine is pretty much maxed out already, so a bigger ____ doesn't really help anything.

Every factory vehicle has compromises to meet budget and legal requirements. I'm sure there are many parts that can be improved over stock. The FOG airbox mod is one basic example. However, it comes down to how much improvement you get vs. how much you spend on the improvement. I just found this carb upgrade for $500-$600 (depending on specifics). I honestly don't know enough about carbs to know if that would be an overall improvement (for street or track). However, that's a pretty good chunk of money (10% of the cost of a brand new bike, more than some people paid for their used bikes). Are you really going to get a 10% improvement over stock with that? Maybe if you spend a few hundred more on an exhaust and jet kit, it might help more. Now you're up to $1,000+ spent and how much better is the bike?

I'm not saying that everything's been done and there's no way to improve anything. However, it seems like the relatively cheap, easy basics have all been tried over the past 25 years and don't significantly improve things. When you factor in the price and role of the average EX500, it's just not worth it to spend so much money for such small improvements. It might be different if it's an old trashed bike where everything needs to be replaced anyway or you're racing professionally and looking for every last tweak to wring an extra drop of power out of it.

Personally, I think my biggest dream is fuel injection. In my eyes, carbs are cheap and "good enough", nothing more. Once you understand FI tuning, it's so nice to work with. With a computer controlling it, you can adjust the fueling for a multitude of engine loads and speeds. Whereas there are a couple ways to adjust how much fuel a carb injects, FI allows for nearly infinite adjustment. The biggest issue with putting FI on an EX500 is probably retrofitting all the electronics and sensors needed to give the computer good information to base its fueling on. Again, with all the time and money it would take to set things up right, sticking with the cheap carbs seems like a better value, even though I know FI would be much better.


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post #12 of 18 (permalink) Old 9-26-2012, 10:20 AM Thread Starter
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Re: service manual for the Keihin CVK34 carb?

So do the carb kits on eBay (bowl gasket, float needle, etc.) work okay or should I order directly from Sudco? I need stuff that works and doesn't crap out at the track. Rick
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post #13 of 18 (permalink) Old 9-26-2012, 11:02 AM
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Re: service manual for the Keihin CVK34 carb?

On the carb kit. Yes they "work" Funny thing to say. They just lay there unless you do something. But you need a new float needle and a gasket so I guess they "work"

To Invisabil: Your verbose statement above is what I've been screaming about on this forum for 10 years. Nice bike if left unmolested. FI is just a way to better control emissions on this bike without a re design of the combustion chamber and cam timing it would be a waste of $ just like all the rest of the mods. Cost effective is the word of the day.

even for my race bike where cost was no object, there was nothing to be had.

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post #14 of 18 (permalink) Old 9-26-2012, 11:16 AM Thread Starter
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Re: service manual for the Keihin CVK34 carb?

Context is everything. "...work okay..." was the question, with okay being the operative word. Perhaps a better question is do the work well, as in are they crap and you get what you pay for? Kinda like free advice: it's worth what you pay for it.
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post #15 of 18 (permalink) Old 9-26-2012, 12:04 PM
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Re: service manual for the Keihin CVK34 carb?

If you want something that will work for sure order the actual Kawasaki parts from Ron Ayers or Bike Bandit or your local dealer.

Bikes: 2003 Bandit1200, 1974 RV125, 1972 TS250 Racer<br />Previous: 1992 EX500, 1998 EX250, 1988zx600c, 1990 XT350, 1988 RM250
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post #16 of 18 (permalink) Old 9-26-2012, 12:17 PM Thread Starter
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Re: service manual for the Keihin CVK34 carb?

Just ordered them directly from Sudco. Prices weren't bad. Cheap insurance.
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post #17 of 18 (permalink) Old 9-26-2012, 8:30 PM
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Re: service manual for the Keihin CVK34 carb?

Hey if we had money we would not buy a 500. Well ofcourse I would be the only one but just for a learning experience and then upgrade to 750. Therefor worth less to spend money on = FRUGAL.
All carb kits should be good as long as they are made in JAPAN. No chinese knockoff but I don't even think they make them.
you can get a good kit that includes everything including pilot screw stuff for $10.
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post #18 of 18 (permalink) Old 9-30-2012, 4:36 PM
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Re: service manual for the Keihin CVK34 carb?

Quote:
Originally Posted by wera335
Me, too, but nothing at Sudco (I have their Mikuni manual). I've got a new-to-me EX500 race bike and want to study up on the carbs and the shop manual I picked up is useless.
A factory Kaw manual should give you every shred of info you need


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