Which Jet?

[roughneck]

I just bought an Arreche 19mm for my '03 Vino with a 70cc bbk, Technigas pipe, CF Reeds, and transmission upgraded. I plan on using the stock airbox and would like to know if I should use the 95 jet or the stock jet in the carb. Any suggestions? Also will the electric choke snap right up?

[SR50racr]

Try the 95 first. If the plug looks too dark, go to a 90. A 90 should do the trick, but it is better to start rich.

[roughneck]

Well I left the jet that was in the carb. Vino is a little hard to start and needs a little throttling up and sometimes a hand choke after removing the stock airbox. Once i get it running it will run great. I'm assuming that the 90 would be efficient enough or will the 95 make the scooter rich. I also run 2 oz of oil to the tank along with the stock oil injection and airbox as you know. I turned the idle up a tad and checked the A/F mix @ 2.5 turns out. Any suggestions?

[SR50racr]

Yea, upjet before you blow the motor. It will sieze quick.

[roughneck]

Really? This little increase in jet size? I mean it runs great once you get it started, it will accelerate all the way to max RPMS very smoothly.

[burnt_toast]

Yes upjet, which jet are you using now exactly? Wit T6 70cc and stock carb my setups worked great at 77.5-80main, with a 19mm and stock box 85main would be closer to what you'd need.

[roughneck]

What ever the arreche 19mm comes with from the factory, I think a 90? When it warms up it will start without help in one kick. I don't want to seize my motor, but don't want any performance to suffer from tinkering with it(it runs so good)

[burnt_toast]

Easy enough to check on an arreche man, just screw off the bowl on the bottom and take out the main with a 6mm socket, then see what size you're at. If its good, reassemble wont hurt a thing. Atleast this way you'll know instead of guessing.

[roughneck]

I mean is a 90 good if it turns out to be? Since it came with a 95 extra it has got to be in the ballpark, but I will check tomorrow and let you know.

[roughneck]

The jet in it is a 60. I installed the 95 and couldn't get it running for anything. Choked it, doesn't even hit. I'm very frustrated, it ran so great before.

Also the needle is bent slightly at the bottom, would this effect anything?

[burnt_toast]

The jet in it is a 60. I installed the 95 and couldn't get it running for anything. Choked it, doesn't even hit. I'm very frustrated, it ran so great before.

Also the needle is bent slightly at the bottom, would this effect anything?

You see, good thing you checked. 60main is way too lean on a 70cc. Slightly bent needle may affect fuel delivery, but may work just fine.

95 should work with open filter, or drop down to 80-85 to use stock box. I'd recommend going out and finding a good range of jets, easy to find for the arreche.

[roughneck]

I'm going out to get an 80 and an 85 jet. I did get the scooter going with the 95 but it bogged horribly. I like running it with the stock airbox since it's quiet(er)

[roughneck]

I went my motorcycle dealer today for the jets. They only had them in increments of 10, so I purchased 70,80, and a 90. Which jet would you recommend going to from the 60 in the arreche using my stock airbox?

[burnt_toast]

Start highest, and downjet. This is the tuning part of carb changing/scooter modding, there isn't just one option that I or someone else can tell you, you have to try different combos.

With that said, I think you'd see best results with 80main, but start with 90.

70main is what a stock carb uses, so you definitely wont need that.

[roughneck]

Well the 90 was too big it wouldn't even allow the clutch to engage so I settled with the 80. It is slower topend than the 60 jet and barely gets past 40, as the 60 jet would peg the needle past the highbeam indicator. Now I can't even start the scooter when it's cold and I have it all assembled. I turned the idle all the way in but i can't for the life of me get it going. I don't want to have to disassemble the whole body everytime I want to ride.

[burnt_toast]

Well the 90 was too big it wouldn't even allow the clutch to engage so I settled with the 80. It is slower topend than the 60 jet and barely gets past 40, as the 60 jet would peg the needle past the highbeam indicator. Now I can't even start the scooter when it's cold and I have it all assembled. I turned the idle all the way in but i can't for the life of me get it going. I don't want to have to disassemble the whole body everytime I want to ride.

Sounds like a 77.5 jet would do wonders for you, that was the perfect combo for my T6 setups with stock box, albeit this was stock carb.

What do you mean idle is all the way in, do you mean the a/f? Thats definitely not what you want, dont even mess with idle speed throttle cable position will pretty much set it, a/f should be 1.5-2turns out.

So your current setup is 19mm arreche 80main and stock box, cast 70cc, RS correct?

If that still feels rich to you (and make sure by doing plug chops first) then you have two options. Take one of the 60main jets and file it out to closer to 75-77.5 jet size, OR you can start by drilling holes in your airbox.

I would suggest the second, since its pretty easy to reverse just by covering up holes. Start with maybe 2-3 1/4in holes or even smaller and see how increasing openings affects performance.

Might be a pain, but tuning is CRITICAL if you want to have a solid reliable setup! GL o_o

[roughneck]

Correct, 70cc (not sure of metal), Arreche 19mm with 80 main, and Technigas R.

Can anyone PM me where to get a manual choke kit for the arreche. I think that might work best?

I've been trying to start it all day. I had the idle screw in but backed it off. I also tried to start it with the A/F screw out 1, 1.5, 2, and 2.5 turns out. It didn't make a difference. I had to spray starting fluid in the airfilter element to get it going. It acts like it's not getting enough gas. I also removed the snorkel piece on top of the airbox and left it with the hole in the top. Ran pretty good, got it up to 45 MPH. It will run great and start 1st kick warm, but I have to go through this everytime I want to ride. I just feel that there is some way to get it tuned right without hacking up my airbox. Any suggestions?

[roughneck]

I can't tell if it needs more fuel or more air... The A/F screw is at 2.5 turns out and the Clip on the needle is in the Middle position and I a running an 80 mainjet with 2 oz of oil added to my gas. The tranny is tuned great and the scooter doesn't bog and accelerates smoothly, but doesn't seem as fast as it was with the 60 main, needle in middle, 2.5 turns out. I removed the little elbow snorkel on the end of the airbox revealing a hole and allowing more air flow. Doesn't run any different. The scooter seems to run great but just doesn't want to start cold without a hand choke or starting fluid. I have the electric choke hooked up properly as the connectors fitted right together. The scooter is smokey but doesn't bog and is hard to start without cutting off air of starting fluid, so is this a lean condition or do I need more air? I'm confused and quite frustrated.

[roughneck]

alright, this is the point where I am ready to smash the scooter to bits. I haven't been able to commute to work on this for two months. I kicked it probably around 200 times this morning and it doesn't even hit. I messed with the screws, mainly the A/F and tried all different setting from 1 to 3.5 turns out. I am pissed. It doesn't seem like my electric choke is working, I unhooked it and it didn't make a difference.

[burnt_toast]

Go back to stock carb.. lol Have you tried drilling the 60 jet? Whatabout drilling airbox holes? You don't need to "hack" it up, but trust me a few WELL placed holes will do WONDERS for you and relieve your frustration. Removing snorkel doesnt help, leave it in it guides the air properly. I would BET choke is not your issue, you can always manually choke by just covering airbox inlet too btw.

I've been trying to give you solid advice here man, but I cant do the work for you just take some time to reanalyze the situation.

[roughneck]

I appreciate it, but I'm weary about running the stock carb especially since I just spent $129. I mean I've worked with the thing all day here, no luck. I could resort to removing the box and choking it by and or spraying starting fluid in the element. Is this not a choke problem. I don't think drilling holes is going to get it started when cold. It won't start even with the box off, you have to put your hand over the inlet or ether it. I'd like to know what it's lacking be it air or gas. I've never owned a scooter this fancy, mostly Goped style scooters and a dinky Razz. I've searched this forum a ton and found that people have had very similar problems. How can I tell if the choke works? I mean it shouldn't be this hard to start, I've kicked it about 300 times today.

[bmyself]

These forums are really good for tips. I look at several all the time for ideas from members with more experience than me. I can relate to what you are going through. I just bought a used Zuma with some minor issues. I will go through the manual and check what I can. If I still can't get it working. I will put it in the truck and let my scooter group members try to help. At a last resort I will take it to a shop. 200 to 300 kicks in one day is surely going to drive anyone nuts. Save yourself some grief and find a local shop with the know how to get it running. It will save you lots of time in the long run.

[roughneck]

I just don't have the money, my shop charges $160/hour and hardly work on any scooters. I'd rather learn myself, but I need some assistance.

[robotguy]

When I was having choke issues, I would plug the airbox hole
with my finger or thumb when kicking.
That would get it started.

I think you must be flooding it somehow with all that kicking,
did you check the plug to see if it's wet when it's not starting?
Then once you flood, it will take awhile to get it ready to run again.

[roughneck]

Yea, I can't remember now what the plug showed. I'm pretty sure one time that it wasn't oiled. I waited like 4 hours later, kicked 200 more times. Doesn't even hit, but it is getting good spark with a new plug. I think I might just order that manual choke kit. Anyone know how it mounts under the seat, maybe a pic?

[roughneck]

Well yesterday I spent the afternoon tuning. I replaced the 80 main with a 90 and initially it bogged. So I removed snorkel and it solved the problem but it was a little lean greyish plug. So I drilled three, 1/2" holes in the airbox cover and that solved it. Plug comes out a very light brown. I then screwed in the A/F to 1.25 turns out. I had to choke the scooter to start it by hand and it started first kick before I did all this. It ran great all day, but I'm not sure if my problem is 100% solved. I'll have to see if it will start on its own today without manually choking it. I think that it is pretty well dialed in, so the jets shouldn't be the issue.

And yesterday before I messed with jetting and it woud not start, I check the plug and it came out wet signalling that it is getting gas.