19 mm carb

[mbmotorsport]

hello i have a vento r4 i have a 70 cc kit and pipe,variator , clutch spring and im wondering if the arache 19mm carb is a bolt on or are there any mods to the intake air box etc... thank you its a 2005 r4

[speedy_scooter]

All you need to do is remove the stock cable from the stock carb, put in the stock cable into the new slide, put the carb back together and attach the new carb to the manifold. If you keep the stock airbox then you will want to drill 1-5 1/4" holes in the outer part of the box to allow more airflow. Its much easier though to get the UNIfilter from Erich here at Provoscooter.com

[ratboycom]

has anyone had any problems just putting the new cable on like that? i heard that you had to shorten it a bit to get it to work right or it would not open all the way

[speedy_scooter]

O yea, forgot about that, i just used the stock adjuster at the carb on my 19mm and that took up the slack once I fully unscrewed the handlebar adjustment.

[Albatros]

The carb was tricky. I used my stock cable but had to dismantle the elbow on the Arreche to get it to work. I'll go get my extra carb and take a picture of what I am talking about I think I have some throttle cables out in the shop too maybe I can to a moch setup of the rig I got to work on my scooter here is a picture of what it looks like installed.

[Albatros]

Did that come out like huge? I'll change the format on my camera so you can see what I am talking about.

[Albatros]

Here are some pics I just took in the shop of how I took up the slack and used the stock adjuster to hook up my 19mm Arreche carb. I'll do it in small stages. the first is the elbow that comes with the Arreche and what it looks like dismantled. Next is the elbow installed and then the rubber shroud is reattached.

[Albatros]

oops. this is the elbow picture before disassembly and after to clear that up. Next is the cable being placed throught the various parts of the carb linkage. Note the arreche adjuster is turned around backwards and washers have been added to take up the slack. The pics may not all be discussed on the individual posts on which they apear.

[Albatros]

I'm just about done talking but here are more pics if there are any questions then I'll get detailed.

[Albatros]

here it is all ready to reinstall. and a pic of how it now looks on my scooter.

[alloo]

Does the bike idle correctly. With a 24 mm carb I couldn't get the bike to idle.
I'm putting a new stock intake manifold and 19 mm Carb.

[speedy_scooter]

The bike will idle normally as long as you have adjusted the idle and a/f screws correctly.

[alloo]

Has anyone tried a 20 mm or 21 mm Arreche Carb. I'm thinking about it because the bike doesn't seem as powerful. Does the Reed Valve change really make a difference? If someone has tried the 20mm or 21 mm carb what jets are you running? I'm curious. With the 24 mm carb, the bike idled fast, but the bike had good power too. With the 19 mm carb the bike runs close to stock. I could only get the bike to run up to about 45 MPH with a 70 cc kit, expansion chamber, clutch, rollers, among other things. Any info is helpful.

[speedy_scooter]

The 19mm carb will deliver better lowend and a bigger carb will give more topend but the lowend will be poor. If you were only reaching 45mph on a 19mm carb and all the other stuff then you werent tuned right. On a Vento you will hit at least 50mph with a stage2. The reedvalve does play a huge role. It will give much better throttle response along with the bike running smoother at all speeds as the metal reeds tend to 'flutter".

[alloo]

Where do you get your reed valve from? I will have to play with the carb a little more. I also am purchasing a longer oil injector hose.

[speedy_scooter]

I currently dont have one but I will be getting one soon when payday comes around. I'll pm you the place.

[Iceman]

BTW! Nice photos Albatros. Very informative. Makes understanding the carb a lot easier! :ll

[Albatros]

When I started reading the posts in this forum, I realized that I only understood about %75 of what was being discused. Getting %25 wrong when tuning?; you might as well just keep it stock. So I decided as that I am thinking about opening a scooter shop here in town I should really delve into the forums and see what the recuring problems, concerns, and questions are. My results were and are still very interesting.

Some peole want their scooter to be fast and that's it. That's O.K. . There is a huge market revolving around speed and the ability to control it. There is also a lot of money to be had. Unfortunately, when you mix business with fun, you get some a-hole that wants to screw you out of your money so he can have more fun. That's just sick. And it is also the reason you keep getting a lot of problems posted and replies that suggest going out and buying a bunch of aftermarket performance parts. I think I'll start a new post and see what the people think.

Thank you for the compliment on the pictures. I used a sony DSC 85 with no performance parts what so ever....

[alloo]

The bike runs like crap after running good for three days. I don't know what happened, now the bike idles and misses, then when you open the throttle the bike dies.

[Lennox]

did you mess with the airfilter..... that could cause what you explaining

[alloo]

Nope, no messing with the Air Filter.

[alloo]

Took the bike to a shope they readjusted everything the bike ran great. When I went to start it up this morning it started then died.

[Speednut]

what happend to abatros pic of carbie? i needed the refrence.

[Albatros]

I got miffed and pulled them like a baby. I guess i'll act like a grown up and repost them here. They needed to be better organized any way. If anyone ever needs to see any photos they have seen here in the past or anything you need to see on the triton r4 just let me know , I probably have a pic of it somewhere. Sorry if this cause you any delay in getting your scooter back on the road. Pictures will be posted with a minimum of bannter. If you got any questions just PM me. To anybody who finds this in the future on a search the same applies. Just e-mail me and if I can be of assistance I would be glad to help.

[Albatros]

Here's the next five in the carb series I shot while installing my 19mm Arreche on my 2005 Vento Triton R4.

[Albatros]

We're half way there now tht we got some washers to take up the "slack". Note that even the washer pattern matches my scooter. "Actually I just noticed it while loading these up."

[Albatros]

The throttle body can be a pain. Just be careful with the spring as it will want to eat your gasket as you thread it on. That may not make sense looking at these pics but it will when you actually do the install. If you are having a bad day, either do this install to relax or go and relax and then do this install.

[Albatros]

I did this pic series out in the shop on some extra parts though the one on my Triton is exactly the same. I screwed the throttle cable adjuster in at the handle bar to ease the tension on the spring and to adequately add the appropriate number of washers on the actual install. You do not need to remove the carburator cable from the junction box to do this install. It is only shown removed in these pictures because this is a recreation shown on a white background to show proper depth of field and alow the camera to be focused more clearly while using a macro lens and decreasing the need for a flash which, in turn, decreases any glare.

[Albatros]

Aside from installing the auto choke. And you will need the Arreche manufactured electric choke to do this install as the stock will not fit the 19mm Arreche carb. You may be able to just plug the choke into the wire connector from your stock choke. Most likely you will not. Just cut the wires off both the Arreche choke and the choke wires from your scooter and install an aftermarket connector or two individual connectors as I did. There is no need to worry about polarity ( or which wire hooks to which wire ). You could solder the wires together but this will make it difficult in the future to change the choke if it becomes necessary.

Now you are only left with adjusting the carb and throttle cable. The carb cable should be at the approprite length now to allow all adjustment to be performed at the throttle cable. Only do this adjustment with your scooter on it's center stand or on a stand that is stable and provides enough height to completely lift the rear wheel from contacting the ground or any other surface. To do this, get the scoot started and tune the idle using the fuel / air adjusting screw and the idle adjusting screw. Now that the scoot will stay running, let it warm up for about 10 minutes. If your scooter dies then it is not adjusted correctly. After the bike is warm and remains running, start taking up slack in the throttle cable until the bike begins to speed up then back off slightly. now give the scoot a few twists of the throttle and let return to idle. You will notice the scoot is on cruise control. Turn the idle screw down slightly and then give the throttle cable enough slack to return the scooter to the desired idle speed. Again twist the throttle a few times. Repeat this until the desired idle is met. You will notice that the throttle cable has no unnecessary slack and that the "play" in the throttle should be removed or barely noticeable. This single throttle cable adjustment performed on a stock scooter with no mods will often times increase the scooters "driveability" and add a feel of quality, stability, and increased control. The carb cable is now acting as the idle control and the throttle cable performs with more response while maintaining the original function of the oil injector.

[teamwatsonon]

I think you need to have the flat washer thingy on top of the clip so that the springs lays properly...

[Albatros]

You know what! I think you are rite. I better go check my scooter and make sure I didn't install the wahser below the needle rather than above it. I'll add a new picture and leave the old one alone so people can see how easiy it is to get distracted. Thanks.

[XPS1210]

the flat washer with the couple holes in it goes closest to the carb slide not the top of the spring... Just to clarify it...

[XPS1210]

to clarify more... it goes on top of the carb slide... between the carb slide and the spring... if this makes since... your pics look right from what I see... unless I missed something...

[XPS1210]

http://www.provoscooter.com/vbull/attachment.php?attachmentid=1485

yeah... this is incorrect... the washer plate goes above the needle and clip... not below....

[Albatros]

A picture says athousan words. Hopefully this time they're saying the rite words.

[Albatros]

I checked my scoot and I had it rite. If the washer had been ih the wrong place it would have raised my needle and screwed up my jetting. Thanks for catching my error. Hopefully the new pics clear it up.

[Speednut]

Great right up Albatros!!!!!!!!!!!!!!! :ll o_o

[Albatros]

Here's what I found when I checked my scooter for the washer placement.