Bonneville America Forums Forums Technical Forums Performance Mods what would be the ideal carb

that says it all. what would be the best all around carb for our bikes? if there is one that would be a considerable increase without leaking gas then i am sure if we all spoke up to some vendor we may be able to get something done

Frank

I would think with all the reviewers ranting and raving
about the TBA and SM now, we won't have long
to wait!
Cash makes thier world go round after all!!
And at 1500+ strong and splattered all over
the web as THE site for TBA/SM?
Come on Edelbrock and Mikuni...
what you waiting for?
Brent to beat you out?

I'm impressed with the S&S, though I've never tried one.

biker has got a set of 36mm Mikuni flatsides that seem to be the ideal carb for a 790 setup, maybe even good enough for the 904s. He bought two carbs, made a simple bracket to secure them together (a opiece of angle iron with 4 holes drilled in it) took all of 15 to make this. Then he made a new throttle cable with a 2 into one adaptor and away he went.They fit perfect and are outstanding quality.
I have tried the 42mm Mikunis,( way way too much gas for the 790s) the new 38mm Amals (pissed gas everywhere but otherwise a fine carb ) and will probably either get the ones from biker (he may go to a smaller size after all) or make my own set of the Mikunis up.
Edlebrock would be fine, as are the S&S (but aren't they really Mikunis in disquise?) and there is a guy over in Spain I believe, or maybe Italy, that has built some fine custom setup with the carbs with the variable accelerator pumps. Can't remember the name, but a search should pull the post up.
Now, what's the best oil?
Seriously though, we (me and biker) have discussed at length about dialing in the Mikuni setups and maybe offering the plug and ride setups for sale. Any interest?

Yes.
I'm fine fabbing up brackets n such, but I could use some help with cables.

if the mikunis were a bolt on kit with everything needed, and at a reaosnable price, reliable, just as streetable and lastely gives proven (dyno sheet) horespower then i would definetly be interested

Frank

Has anyone thought of trying Dellorto's? I was checking them out and I see they run them on Ducati's and some other bikes. Any thoughts or experiences with these?

I put a Dellorto from a Mustang motor/cycle/scooter on my old Cushman. Great carb! Oh, that was around 1960........

hey pat.. yes so far i like these carb's still working on them getting them dialed in.. but getting closer every day as i learn more and more about them..see there is not any info out there.. on the tm flatslide for street use ton's of stuff for flat track racen...were that seems to be the carb to use for flat track racen..but like i said i am very close to were i want them for street use with my new pipe's. that i have.. i had to get rid of my home made ones because i could not get them to work with my new carbs at the lower range..i hope to have all the facts and show every one how there all set up..very soon..

ED

hey 69tri1..yes a member called FastDude from sweden was talking about useing one on his bike said he was allready use a Weber 45 DCOE on his bike with very good luck for the last 2 years wish he would share this infor so that other people clould look into useing this setup on there bike.. but the main resone i went with the mikuni's over the other ones here in the U.S.A you can get parts for them at any biker dealer no mater what kind of bike they sell and the mikuni's also so go right on our biker the way they are.. from the looks of the weber or the dellorto's you would need to make a manifold to get them to bolt up to our bike's but i could be wrong maybe fastdude will read this and give us insight on these carbs and how they work on our bikes a long with some pic's

ED

I was on there site www.dellorto.it/ and was looking at there carbs for motorcycles and they look like they should bolt up about the same as a Mikuni or Amal I would think. I am just going by the pictures on the site but they look like they would fit. Maybe I will try contacting fastdude and see if he has tried them yet. Check them out on there site if you get a chance. Ron

hey 69tri1..yes it look like the bike one's will fit right up but he was not useing the bike one's he was useing the one's i put the pic's up of on his bike..but i would still stay with the Mikuni they will be much easer for you to put on and get part's because you live here in the U.S.A the dellorto look like great carb's but they are made in ITALY so i would look into how easy would it be get a set of them and then look into getting parts for them here in the U.S.A

ED

hey frank..looks like i have them dialed in and in the next couple of week's i will be getting them DYNO and i will put up the sheet and see what number's i get with this set up.

ED

sounds good to me

Frank

Sorry for the late response... but here's some info.

http://www.algonet.se/~uran/weber.html

Lectron makes some pretty cool externally adjustable carbs, for motorcycle apps. I have one on my CR500, and there is a definite power gain when you are able to adjust without taking out jets and needles. When you are constantly disassembling the carbs, there is a tendency to leave in a "close setting", because tearing down the carb, one more time is just too much effort. The only downside to the Lectron is price.

Graybeard, the Edlebrocks are actual a better design than the Bendix. Also you can adjust them easier than the Mikuni's. I have a set of Edlebrocks waiting to be put on when I start my build........Angelis

After 9 runs on the dyno,I am running Truxston needles 2 shims.Bubs slashbacks,Freak box,K&N's,Nology IgnitonIridium plugs,Harley pitcock. The bike made 64.53HP & 49.41 LB.of Torque.Stock needles and 2 Or 3 shims I think would get the torque up in mid range..I just put a belt drive on it & I can't wait to get back to the dyno-the belt is 2lbs 11 ounces lighter than the chain.The difference on my bike is wild.It made the bike smooth and the control is a lot better...best money I spent. Just my .02 cents

Honestly I think CV have lot of shots in their guns...

If you know how to modify and fine tuning the power is so close to a flatslide that the last doesn't worth the money they cost...

I'm a specialist in CV modifications. I modify also the emulsion tube closing some holes with epoxy metal bi-component glue.

During 80ies on emulsion tube there were 12 holes small. After 1995 they became 16 larger. With so much holes they obtained a lean emulsion with lot of air that you are obliged to compensate with thin or high raised needle.
It's normal to rise the needle of 4 or 6 shims (3mm, 0.5mm each shim) now, it was not normal when there were 12 small holes on the emulsion tube. So I close from 6 to 10 when I fine tune my carbs.

Also the small air passage on bottom of the Venturi became larger. Some dynojet for some bikes provide emulsion tube with small and few holes or a brass cap with a small hole to put in front of the stock...

Also the spring can be cut to obtain an anticipated raising. It works like a preloaded spring of the shocks, if you reduce preload the slider/needle will raise before.

And fuel level is important too...

If only we could get our hands on the belt drives...

Give me a chain over a belt any day!

never heard anyone convert to a belt and say they want to go back on these bikes

Frank

I have when they are sitting along the road with a broken belt and can't put a master link in to get rolling again. plus don't have to take the bike apart to change a chain.

I carry a chain breaker and 2 master links with me.

When you'll brake a belt many miles away from home, You'll learn to love chain.

Chain advise you before brake.
Chain starts to become weak and noisy when used.

You can also see sprocket teeths lightly bended when it's time to change them.

Modern chains don't brake easly like before.

A belt can brake without simpthoms. Sometimes is sufficient to run with front and rear sprockets not perfectly aligned to damage internally the belt that will brake without advise.