This is exactly the video I needed to decide to go to a single conversion. I’m running2 mikuni tm38 flat sides on my 83 xv750 so I’m going to look at buying the 2to1 manifold and doing this.

@mattfranco8715

2 жыл бұрын

Oh okay cool! Can I ask why you want to go to the single carb? Similar reason to me?

Great video Matt, I am looking at the Mikuni site now and deciding which one to get for my 81 750. Cheers

@mattfranco8715

2 жыл бұрын

Thanks mate! Much appreciated! Good man! You won’t be disappointed!

Hello Matt. Sharp looking bike. I have seen the Mikuni installs on others but this is the cleanest. The others used a black goop to seal the manifold to the heads. That turned me off. I will be checking your other videos. The conversion is not on the list just yet. I have a lot to learn but enjoy doing the work myself on my '96.

@mattfranco8715

2 жыл бұрын

Thanks mate! Much appreciated. Yeah I agree, very clean install. I think stick with twins. The single has been abit of a headache for me. If you watch my most recent vid you’ll see what happened. Needless to say, back on the twins now. I may revisit the single if I feel motivated again haha

@mattfranco8715

2 жыл бұрын

Yeah the best way to learn is tinker yourself! Great bikes to do so aswell. Parts are cheap and plentiful!

Very nice i so need to do this.

@mattfranco8715

Жыл бұрын

Recommend watching the second episode of that series. I had issues tuning it. One of the cylinders was being prioritised over the other. I put it down to manifold design. I still have that kit sitting in a box in my shed haha. Ended up converting that bike back to twin carbs but I used VM36s

I designed a manifold that looks a lot like this one, I dismissed it as not have equal enough flow and didn't end up making it, but that seems to work OK. How is it after a short while now you're running it?

Happy new year

@mattfranco8715

Жыл бұрын

Same to you

Great video, keep it up! I have a Yamaha XV 500 from 1983. Do you think this could work on it? Or the VM 34's?

So far non of single carb converter in the market worked efficiently. Some people are still in working over it to built a perfect one. but will get there.

@mattfranco8715

2 ай бұрын

Yeah absolutely. Honestly my twin VM34s work so good that I can’t see that I’d go to a single on my cafe racer anytime soon. I sold the bobber a while back unfortunately 🥲

Fantastic! Sounds like a harley 😍

Thanks, mate for making that movie. I'm not a fan of a single setup and was wondering how it rides at high speed? It would be great for so many who do such a conversation. Of course, won't that beat the two Mikunis with flat sides you had in before?

@mattfranco8715

2 жыл бұрын

Hey mate, no problems at all. Yeah look, I have had limit time on it with the single carb. Basically a few hours of tinkering on a day off. Since I made this vid I Havnt been on It so I’ll have to get back to you on that one! But yeah agreed, the twins would be much better power wise etc. but this bike is going to be a highway hog so I want to simplify it so it’s easily adjustable on the road. The twins are just abit cluttered. I suppose once they are jetted right you shouldn’t need to change anything apart from routine maintenance.

I have suzuki katana 600cc 1994,can this be done on it,the four carburetors is giving me problems.

Leave it to the Aussies to make everything easier!😂 Sick as man, ordering this soon and I’m throwing it on my 82 VX750

@mattfranco8715

2 ай бұрын

Haha, bloody oath. Mate before ya order do some research on the manifold design, I had dramas trying to tune it.

@WowItzAkina

2 ай бұрын

@@mattfranco8715 I Heard about that, I read on the forms somewhere that if you get the round slide version it’s better, not sure how valid that claim is but I’m giving it a shot

I have a 1983 XV500K. Looking for carburetor size info. Everything seems to be for the 535 and larger. Any help would be appreciated.

I dont know whats the problem on mine I just installed it and when giving slightest of throttle it stalls and backfires into to the carb. it feels like the pilot would be glogged but it isnt. I guess I have to check that the carb gets enough gas from the tank. maeby float is off somehow?

Hallo brother,, salam kenal dari Indonesia🇮🇩, Berapa size pilot dan main jet yg anda pakai, mohon bantuannya 🙏🙏🙏🙏

interesting, single carb 4 my 535 , just waiting on 34mm T-joint pipe

@mattfranco8715

2 жыл бұрын

That’s exciting! Should rip with that on it

great video , ? yea found the carb site you mentioned in Australia , very interesting . very good value ....im in the UK :( post may be a thing ......

@mattfranco8715

2 жыл бұрын

Yeah great value I think! Such an easy kit to install and get running quickly. Yeah I think it may be an issue. I’m not sure that they send stuff internationally. They are based in QLD and serve Aus but yeah I guess an email couldn’t hurt.

@specialse

2 жыл бұрын

@@mattfranco8715 Got a bud that lives in Melbs , may go down that route . he also has an XV 750 se :-) ill give it go .

@georgewood9482

2 жыл бұрын

MikuniOz do free international shipping on purchases above 500 AUD. I'm also in the UK and trying to decide on one of these kits

Wanted to do thesame thing but on a vt750. Cant figure out what to do with the TPS. I dobt understand why a carb would need a tps

@johnbekkers5201

Жыл бұрын

I bought this kit My vt750 was running very bad I bought carby kits for the twin carbs They are a pain to remove and replace . Still ran bad so got the single kit took only 40 min to install . The bike started instantly ran good backfired when I turned the throttle so I put a bigger jet in did not have to take the carby of the bike ran good at 100kh it backfired once so put bigger jet in and runs sweet had it up to 130kh no problem Very happy with it

Wont that decrease performance tho?

Matt Franco, Can you please provide a link to the carburetors you took off of your bike in this video ? Thank you very much.

@mattfranco8715

2 жыл бұрын

The kit is a VM36 round slide pair with throttle cable, manifolds etc. link in the description now 🤙🏼🤙🏼. You’re welcome!

I've been looking at these kits, I'm torn between pulling the trigger now on the TM38 as you have, or waiting for the TM40 pumper to come back in stock and spend the extra money...

@mattfranco8715

2 жыл бұрын

I mean, the pumper is probably the better choice. But for me the 38 will be fine I think. If you’re not in a rush I’d hang out for the pumper

@georgewood9482

2 жыл бұрын

@@mattfranco8715 I'm not in any major rush, I think the pumper would be better, but unsure if it would be better enough to warrant the extra chunk of cash

i luve u my singel carb work grate.

@mattfranco8715

Жыл бұрын

I’m very tempted to try another single carb setup on my cafe racer, but with a KJS manifold.

@CustomMax1

Жыл бұрын

@@mattfranco8715 This will work, 100%. I ride it since over 10 years. And it runs better than Stock. If You like take a look at my ride.

Top ...and a nice Bike your XV. Do you know...if the same parts are run´s by a XV 1100 (Bj.1998)?? I `ll plan to change the Carb´s from dobble Carb( orig.) to a single Carb´s with parts...her in fuc...ing Germany :-)) Good luck for you and this bike and THANK´s for an answer !!

Any idea what size jets are in it? I have the same carb and engine size and can’t get it tuned to save my life.

@mattfranco8715

2 жыл бұрын

22.5 230

Where does the tubing go from the carbs? My bike doesn’t have and AIS system will this still work

@mattfranco8715

2 ай бұрын

I just deleted all that :)

Who did you get the manifold from I want to do a single carb conversion on my vstar 1100

@mattfranco8715

10 ай бұрын

Mikunioz.com

xcellent.

@mattfranco8715

2 жыл бұрын

Thanks Jennifer!

Saludos Matt. Le dejaste la bomba electrica de combustible o la eliminaste.? Yo hice eda conversion con un BST40 Mikuni

@mattfranco8715

10 ай бұрын

Hey there, the 750s never came with a pump as far as I know. So yeah I never had one.

I did the same with vm30 and then tm38, sounds like yours but after 600km I go back to two carbs tm38. I couldn't balance the two cylinders, one of the cylinders always took more gas, motor rebuilt, same very good compression. I hope you can adjust it correctly. G.L.

@mattfranco8715

2 жыл бұрын

Yeah that’s my worry too. The cylinders will always burn differently I just hope they aren’t too different.

@sisaketmike

2 жыл бұрын

@@mattfranco8715 I think it's almost impossible to adjust them that you have enough power in the low, mid, and end range. That's why I prefer my two Mikunis, even when I have to pull them again. The front cylinder gets flooded, and the valve of the front cylinder's carb must be hanging sometimes. The problem is that it happens sometimes. God, I had them working well for four years after a good rebuild by myself. Now perhaps the O-ring of the valve seat has decreased, I have no idea. Every time I order something from the US, like a K & L carb kit, the shipping is sometimes more than the product. Ride safe and stay healthy!! Greetings from Thailand to all bikers.

@longdong3889

2 жыл бұрын

Check valve clearance first. Then if the cylinders aren't firing properly check for intake manifold leaks or bad plug. If one plug keeps fouling put in a hotter plug presto

what did you do with your vacuum cutoff valve? I don't know if i need to keep them or not with the single carb.

@mattfranco8715

2 ай бұрын

I think I changed the valves to just manual on off petcocks.

No abra este kit para. Vulcan vn750 Saludos desde argentina

@mattfranco8715

2 жыл бұрын

Do not open the kit? Sorry, not sure what you’re saying really. Habla usted Ingles?

Nice. Going to install the same manifold with a VM34 on my 750. I'll also need filters for the crank case breathers, right?

@mattfranco8715

2 ай бұрын

I did not have great luck with the manifold that’s for sure. If I was to do it again I would order a KJS manifold.

@JwpGaming

2 ай бұрын

@@mattfranco8715 yeah, saw the other vid. what main jets do you run in the twin VMs? I'll give the single a go, if I can get it running and If I'm not happy, I'll just buy a second VM 34 and go for twin.

I am installing the same on an xv 1000. Do you know the size of pilot and main jets ? I have problem with the idle circuit. Thank's !

@mattfranco8715

2 жыл бұрын

Hey, the jets mine came with were 22.5 pilot and 230 main.

@mathieusimon3640

2 жыл бұрын

@@mattfranco8715 Thank's !!

@mattfranco8715 your attachment is very clean. What boots did you use to attach the carb to the manifold?

@mattfranco8715

7 ай бұрын

Everything is included when you buy the kit from Mikuni Oz.

@mikegordon9801

7 ай бұрын

MikuniOz are nice folks very helpful but my manifold did not come with a boot “spigot adapter” it does have the 2 boots for the cylinders. I made one that should work. There are rejetting recommendations out there with guys claiming to have great performance with the BST40. Fingers crossed.

how'd you deal with the petcock? I ripped the stock lines out with the carb, plugged what I suppose is the vacuum for the stock carbs (the smaller outlet) and ran an 8mm line with an inline filter from the petcock to the carb, but now the bike only works on 'PRI'. 🤔

@PraiseJesusChrist2024

19 күн бұрын

Someone elaborate. I have a xv700 with a very similar issue. For one I believe it is clogged. Get a new valve or clean it then get ready to mess with your carb a bunch.

What was the maximum speed you had with the double mikuni vm 34..? Is it worth ordering and I have a virago 750?

@mattfranco8715

4 ай бұрын

Max speed? Don’t think I’ve ever maxed it out. I probably never will. If I have to order a set of new carbs for my wife’s bike they will definitely be VM34s. I love these carbs. So easy to adjust, everything is accessible unlike the VM36 kits. I’ve got the 34s still on my 1000 and it rips!

I did a single carb setup but no way can get jetting correct. Fouls rear plug when idling (black and sooty) front burns great. Put on two TM 38's as most forums say. Ran great all rpm but way over carbed again fouls at low. Asked Greg Hagman and he said VM 34's seem to work perfect for him. I have ordered and now waiting.

@mattfranco8715

7 ай бұрын

Yeah beautiful. I have twin 34s on my xv1000 with 750 heads. They are great. They’ve been on the bike since it was a 750. Just had to re jet it after the changes and modifications along the way.

@loukaspanagopoulos

7 ай бұрын

@@mattfranco8715 What was the maximum speed you had with the double mikuni vm 34..? Is it worth ordering and I have a virago 750?

@450cafe

4 ай бұрын

Perfect, thanks Matt

Great video! What kind of exhaust do you have on that bike?

@mattfranco8715

2 жыл бұрын

Thankyou! It’s a custom exhaust that I built. :)

@beow27

2 жыл бұрын

@@mattfranco8715 Nice! looks great man.

Could this be applied to the xv1000?

@mattfranco8715

2 жыл бұрын

100% it can be.

En mi Virago 1100

Where did you get your pipes made ? Sounds great

@mattfranco8715

3 ай бұрын

I built them :)

Doesn't your leg hit the air filter? I've been thinking of getting that kit but not sure, not sure..

@mattfranco8715

7 ай бұрын

I was honestly worried about that too. It was less of an issue than I thought though.

Will this work for a 1983 750 virago?

@mattfranco8715

4 ай бұрын

Yeah the carb kit will still work for your model.

Hello, Do you know if they make a manifold for XV535?

@mattfranco8715

2 жыл бұрын

Hey Paul. No sorry, as far as I know they don’t. But have a look on their website mikunioz.com

@georgejohnson1772

2 жыл бұрын

@@mattfranco8715 KJS does

@poljames7492

Жыл бұрын

Bike from the Brink has made one for my 535, just waiting for it to arrive, been told a PWK34 carb is what i need now

Has anyone else done a single carb conversion just like this? I've done the same thing but I have a issue with the front cylinder not firing correctly. I've done a cylinder drop test by pulling the coil wire off the rear cylinder spark plug and the front cylinder dies as soon as I do it. Only way to keep it running is to turn up the idle when I do this. The rear I will do the samething but to the front and it will stay idling no problem at 1050 rpm. Can someone try doing the same thing on there bike and let me know please? I've tried so many things and I think the bike just doesn't like the single carb life. Thanks guys!

@mattfranco8715

2 жыл бұрын

I honestly reckon it’s all to do with manifold design. I’m keen to try a KJS manifold in the future on my cafe racer.

@CustomMax1

Жыл бұрын

I have a KJS System with a Mikuni Flat TM40 on a xv1000 from 1985 US Model. It working perfekt from idle to 170Km/h. I love it.

@mattfranco8715

Жыл бұрын

Yeah that would the go. I’ve still got my TM38. So I’ll look at buying a KJS manifold one day and seeing if I can make it work. I love my VM34s but!

Did you put the air box back on afterward? I couldn’t see it

@mattfranco8715

Жыл бұрын

Sorry, I deleted my comment, got confused for a second there. This was the single carb conversion so you get a pod filter for it. So I ran the pod while it was single carb. Later I just bit the bullet and ordered twin VM36 carbs and fitted those and retained the standard air filter housing.

@BuuTube

Жыл бұрын

@@mattfranco8715 I have an xv700 that was single carb converted before I bought it. Can you give me a link to where I might buy an airpod so I can give it a chance before I give up and get a set of carbs?

@mattfranco8715

Жыл бұрын

Oh okay nice. Yeah I buy my stuff from mikunioz.com

@BuuTube

Жыл бұрын

@@mattfranco8715 thank you!

Just curious whats the advantage of the single tm 38 when mikuni sells the twin 38 kit at 700 thats canadian 🤔.

@mattfranco8715

10 ай бұрын

I was going for simplicity honestly. I wouldn’t say there would be any obvious advantage other than less moving parts.

@crominion6045

8 ай бұрын

Half the parts and no syncing needed. For simplicity and ease of maintenance this is a great mod, assuming the manifold issue can be resolved.

What are the clear tubes for ? Did you hook those up ? And what size throttle cable you get . I’m going to do this to mine

@ogscratch9496

2 жыл бұрын

My bike came with a custom single stock carb I don’t think I can jet it so this is definitely in my eyesight is there any way you can do a video tuning the carbs ? I have no idea how

@mattfranco8715

2 жыл бұрын

They are all overflow drains. Prevents the carb from filling your cylinders with fuel.

@mattfranco8715

2 жыл бұрын

Yeah no problem I can do a vid! I was planning on doing that anyway tbh. I’m having some struggles with the single so I’ve got to do some more testing etc. My computer is being diificult that’s why I Havnt posted any more vids atm. Mikuni make it pretty straight forward tuning wise and include a step by step explanation on initial setup. Thanks for watching and commenting!

@ogscratch9496

2 жыл бұрын

Matt I have two throttle cables how did you install those or did you add them

@mattfranco8715

2 жыл бұрын

@@ogscratch9496 hey mate, you should have a single throttle cable for a single carb

Flat slides are supposed to flow more air and better flow with less turbulence especially at WOT.

@mattfranco8715

Жыл бұрын

Yeah fair enough. I guess it’s not something that will make any difference for what I need it for. My roundslides are amazing.

What are your wheels off are they xv750 wheels

@mattfranco8715

10 ай бұрын

Yeah both are the stock XV750 wheels just painted

Hello, I installed one carburetor, CV40, but the bike won’t start, it shoots!

@mattfranco8715

10 ай бұрын

How did you go with it? End up sorting it out? Does it backfire loudly or puff out tonnes of unburnt fuel soot? Does it start if you give it throttle?

@dmitriydmitriy8434

10 ай бұрын

@@mattfranco8715 do you have Facebook ?

I have a virago 1100 1995. Will this work on mine?

@mattfranco8715

5 ай бұрын

Yeah that carb setup is used on 750-1100. You just specify what you have and they pre jet it accordingly.

@clasicradiolover

5 ай бұрын

@@mattfranco8715 I have my brother's old bike. It needs the carbs cleaned anyway. So maybe I'll do this instead.

Debes usar un BST40 Mikuni, solución sl problema y las agujas trabajarlas para mayor consumo de gasolina..! Yo lo hice con mi VIRAGO xv1100 y sabes. Ella esta como dios manda Paciencia Yo viaje 500km el consumo de gasolina no probe si mejoro en ahorro, solo aprendi a darle al acelerador.! Ahora transforme el tanque de gasolina a 24 litros, salidos desde Maracaibo City, Venezuela

@mattfranco8715

Жыл бұрын

That’s good to know! I have a couple of those carbs in my spare parts bin. I’ve since sold that bike. But I may try a single carb in the future on my cafe racer! Thanks so much for the comment and for watching my videos :)

What is the carb??

@mattfranco8715

Жыл бұрын

That is a Mikuni TM38 Flatslide Carb

The duals are way more efficient and deliver a better ride than the single setup especially on the xv750.

did you make those pipes?

@mattfranco8715

2 жыл бұрын

Sure did :)

@grandspork6665

2 жыл бұрын

@@mattfranco8715 Did this set up really start as easily in the video been having alot of carb trouble with my 82 virago and am thinking about buying the kjs manifold

this is the vinner .

Rebuilding an 82 xv750...to bobber

@mattfranco8715

Жыл бұрын

Very nice! Great bikes 😍

wow im suprised you could do that so easily so much better than 2 carbs well unless ya know how to work on them LOL

@mattfranco8715

Жыл бұрын

I agree. Simplicity is what I was after, but I ended up with 1 cylinder being prioritised over the other which was fouling plugs like crazy. I put it down to manifold design. If I was to do it again (which I most likely will) I will be fitting a KJS manifold.

@BeaulieuCarl

11 ай бұрын

@@mattfranco8715 don't bother... Been trying everything to fine tune my single carb setup and its just not the way to make it reliable ... Yes more torque at the bottom but Sparkplug will always end up fouled.

Won’t be losing power with only one carb ?

@mattfranco8715

8 ай бұрын

Honestly couldn’t feel a difference in outright power and the bobber wasn’t really about power anyway. It actually surprised me how much power it did have on the single carb. But all that was over shadowed by the issues I faced.

nice video but it doesn't look any where near as nice without the covers on does it

@mattfranco8715

2 ай бұрын

As in the standard airbox and the fake cover? Yeah they look pretty sweet but I preferred the simplistic look tbh.

Anyone that Can tell me why people do this?😊

@joshmatthews5384

11 ай бұрын

The look and to simplify the bike

@mattfranco8715

10 ай бұрын

I think I explained it on my video pretty well. I was after simplicity. I didn’t care about outright power etc. the bobber was always going to be a camping, cruising bike that I could fix easily. But I guess to a degree I can eat my own words because it was NOT simple to tune. I still blame the manifold design but never confirmed it.

i have $100 bet not a single video of that running well, is out if there is please send me the link so i can pay him his money (not just idle but idle to full throttle in one cut) this is a real bet

@mattfranco8715

Жыл бұрын

Haha, I made a second video on it. Couldn’t get it to run good. I put it down to the manifold design. It was fouling the rear cylinder

@thadsprenger4932

Жыл бұрын

@@mattfranco8715 thier is a lot I would like to say but just can't it doesn't work and that's enough for me if anyone else thinks they can do better I have a 1992 that we can try it on you pay all the installation cost

Way too low idle. Asking for the cams to seize due to lack of oil been pumped upwards. You will get away with it for a while. Loosen one of the oil pipes at the top and see the different amount of oil that is pushed up between 750 rpms and 1000 rpms.

@mattfranco8715

2 ай бұрын

Yeah absolutely, the single didn’t stay on this thing long at all. Ended up with twin VM36s

@darkeneddreamzzz8624

2 ай бұрын

Or get this: Turn up the idle screw.

Your set up is all wrong on your carb

@mattfranco8715

8 ай бұрын

Yeah mikuni Oz later confirmed that. I fiddled for awhile and fouled a bunch of plugs but the manifold 100% prioritised 1 cylinder over the other so multiple issues. I’ll try a single carb again but on my cafe racer I reckon. But this time I’ll design and fabricate the manifold myself.

@cleancutstudios

8 ай бұрын

@mattfranco8715 if you turn down the accelerator pump a little and adjust the accelerator pump to spray even between the cylinders it will make a big difference

@mattfranco8715

7 ай бұрын

@@cleancutstudios that carb didn’t have an accelerator pump.

@cleancutstudios

7 ай бұрын

@@mattfranco8715 Sorry about that. I thought that it did, but that's how we do the T M 40-6