Kz1100 Mikuni Bs34's

I been talking to Daveo on here about how his bs34's were set up. And researching these carbs I came across a company (sigma and dyna jet) that has a kit.
Are these kits any good?
The bike is stock from the internals to the airbox and exhaust. the fuel screws were still sealed and the needles are stock as well as the jets.
The bike has never been a smooth starting bike. It seems to run ok.
I know its from the beginning of the smog era and could run better.
What could I do to the carbs?
I just want it to run smooth.
Eddie

You don't need a jet kit, just clean the carbs properly and replace all the O-rings. This tutorial was written for a Suzuki but about 90% of the elements cross over. Cycleorings.com sells a BS carb kit so I'd order that up. zeus.mtsac.edu/~cliff/storage/gs/Mikuni_...Rebuild_Tutorial.pdf

To assure the bike runs properly make sure you have an OEM type air filter, not a K&N type. Vacuum sync the carbs and tune the pilot screws using the highest idle method. All pretty basic stuff.

Nessism wrote: You don't need a jet kit, just clean the carbs properly and replace all the O-rings. This tutorial was written for a Suzuki but about 90% of the elements cross over. Cycleorings.com sells a BS carb kit so I'd order that up. zeus.mtsac.edu/~cliff/storage/gs/Mikuni_...Rebuild_Tutorial.pdf

To assure the bike runs properly make sure you have an OEM type air filter, not a K&N type. Vacuum sync the carbs and tune the pilot screws using the highest idle method. All pretty basic stuff.

+1
For not really knowing what I'm doing to my 1100, she reacts favorably to rough caresses. Don't ride her too hard, but slap her once in awhile.
Fiddling is more like it. :blush:

That's a good read. Thanks Ed
Dave...I think you know what you're doing, your bike is super nice and I'm sure it runs as nice as it looks.

Nessism wrote:
To assure the bike runs properly make sure you have an OEM type air filter, not a K&N type. Vacuum sync the carbs and tune the pilot screws using the highest idle method. All pretty basic stuff.

My new to me KZ1100 shaft came with an un-oiled K&N. I just oiled it today as I just got the carbs rebuilt and valves set. You think the K&N flows too much air? I also have V&H 4 into one with cone and baffle. Bike started easily and idle pretty good for just rebuilt carbs and not synced or idle max mixture adjustment yet. Takes throttle with no hesitation but have not test ridden it yet. Oh.. Mains are 120 never could see a number on the pilot jets.

As established by independent testing, a new stock pleated paper air filter element flows as much air and cleaner air than does a fresh properly oiled K&N.

The K&N is "good," but the stock pleated paper filter element is "best," especially when the stock pleated paper filter element is clean, fresh and new.

The one advantage of the K&N is ability to re-clean, re-oil, and re-use over and over and over again, virtually forever, and it does a pretty good job, just not as good of a job as does the stock pleated paper filter element.

Over the long haul, the K&N will probably be less expensive when compared to replacing the stock pleated paper air filter elements, at least until the cost of an earlier overhaul is factored into the cost analysis.

That said, many owners are content to use the K&N.

I was content with K&N until reading the independent test results when K&N's filter flow and efficiency was compared to filter flow and efficiency of pleated paper elements.

Good Fortune!

Patton wrote: As established by independent testing, a new stock pleated paper air filter element flows as much air and cleaner air than does a fresh properly oiled K&N.

The K&N is "good," but the stock pleated paper filter element is "best," especially when the stock pleated paper filter element is clean, fresh and new.

The one advantage of the K&N is ability to re-clean, re-oil, and re-use over and over and over again, virtually forever, and it does a pretty good job, just not as good of a job as does the stock pleated paper filter element.

Over the long haul, the K&N will probably be less expensive when compared to replacing the stock pleated paper air filter elements, at least until the cost of an earlier overhaul is factored into the cost analysis.

That said, many owners are content to use the K&N.

I was content with K&N until reading the independent test results when K&N's filter flow and efficiency was compared to filter flow and efficiency of pleated paper elements.

Good Fortune!

Where could a person read this report?


.

K&N's flow lots of air because they don't provide much restriction, and they don't scrub the air as well as a good paper filter for the same reason. My reasoning for recommending a stock filter is because then you KNOW that the bike should run well; stock exhaust, airbox, and filter means no guessing on jetting. Start changing stuff and you are immediately off the charts and on your own.

Nessism wrote: K&N's flow lots of air because they don't provide much restriction, and they don't scrub the air as well as a good paper filter for the same reason. My reasoning for recommending a stock filter is because then you KNOW that the bike should run well; stock exhaust, airbox, and filter means no guessing on jetting. Start changing stuff and you are immediately off the charts and on your own.

My feelings exactly; When I saw the K&N my son said "cool" but I was skeptical. I've been dealing with these old UJM long enough to know that to get the CV carbs to work properly they need the OEM paper filter. That being said I just completed reviving two GS850's and had aftermarket foam elements. After I cleaned and oiled them properly the bikes ran amazingly well. So I'll try the K&N for a while and see how she runs. God knows they are sure easy enough to swap out. Those GS filters were kind of a PIA to get them changed and the box sealed up.

jdvorchak wrote:

Nessism wrote: K&N's flow lots of air because they don't provide much restriction, and they don't scrub the air as well as a good paper filter for the same reason. My reasoning for recommending a stock filter is because then you KNOW that the bike should run well; stock exhaust, airbox, and filter means no guessing on jetting. Start changing stuff and you are immediately off the charts and on your own.

My feelings exactly; When I saw the K&N my son said "cool" but I was skeptical. I've been dealing with these old UJM long enough to know that to get the CV carbs to work properly they need the OEM paper filter. That being said I just completed reviving two GS850's and had aftermarket foam elements. After I cleaned and oiled them properly the bikes ran amazingly well. So I'll try the K&N for a while and see how she runs. God knows they are sure easy enough to swap out. Those GS filters were kind of a PIA to get them changed and the box sealed up.

Many of the Suzuki GS bikes came stock with an oiled foam filter. Nothing wrong with those. The key thing is to stay stock unless you plan on rejetting.

Nebr_Rex wrote:

Patton wrote: As established by independent testing, a new stock pleated paper air filter element flows as much air and cleaner air than does a fresh properly oiled K&N.

The K&N is "good," but the stock pleated paper filter element is "best," especially when the stock pleated paper filter element is clean, fresh and new.

The one advantage of the K&N is ability to re-clean, re-oil, and re-use over and over and over again, virtually forever, and it does a pretty good job, just not as good of a job as does the stock pleated paper filter element.

Over the long haul, the K&N will probably be less expensive when compared to replacing the stock pleated paper air filter elements, at least until the cost of an earlier overhaul is factored into the cost analysis.

That said, many owners are content to use the K&N.

I was content with K&N until reading the independent test results when K&N's filter flow and efficiency was compared to filter flow and efficiency of pleated paper elements.

Good Fortune!

Where could a person read this report?


.

Where could a person read this report?

Here are links to a few of the articles.

www.nicoclub.com/archives/kn-vs-oem-filter.html

mymiata.paladinmicro.com/K&NComments.htm

www.bobistheoilguy.com/airfilter/airtest1.htm

www.bmwcca.org/forum/index.php?threads/i...n-type-filters.7642/

Good Fortune!