Help Aerox R 2014 Jet size???

Discussion in 'The Workshop' started by bornagain, May 21, 2014.

  1. bornagain

    bornagain Aerox R 50 yasuni z polini variator 4.9g rollers

    Messages:
    20
    Rides:
    Aerox R, WR125X
    Hi everyone, I'm hope someone can be helpful here,

    I just bought a brand new Aerox R and had it derestricted by the dealer. Washer removed from the variator and exhaust, plus the two pipes cut off and welded.

    I thought the main jet was a 62 so I bought a Gurtner Main Jet Size 68, this was a different jet and didn't fit. I'm sure the main jet on the Aerox said 60???
    Looking into it a little more I must have a Dellorto Main Jet size 60 but all I read on the net is it's a 90 standard. Did I read the number wrong????

    The reason for changing the main jet is the peds quite a lot slower once warmed up.

    Please help!!
     
  2. MARSH

    MARSH Whooooo!

    Messages:
    3,266
    Rides:
    Piaggio Typhoon
    Find out what size thread it is, 4/5/6/mm then get a load of jets and start changing them until it work's right.
     
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  3. bornagain

    bornagain Aerox R 50 yasuni z polini variator 4.9g rollers

    Messages:
    20
    Rides:
    Aerox R, WR125X
    Ok Thanks, Just put a 68 from 60 in. Just bought a Aerox/ Minarelli Polini Variator and a Yasuni Z Exhaust System.
    Could someone please tell me the torque of the variator nut once all fitted? I have had a bad time with my last one on my old bike as I stripped the thread. I believe I over tightend it!

    I'm hope these small upgrades get me and my 16 stone moving a little quicker.

    The Aerox is brand new just covered 200 miles so far, yes probably not best adding all these parts so early, but hey time will tell!
     
  4. AeroxJoe94

    AeroxJoe94 Member

    Messages:
    44
    Tighten the variator bolt to 33nm
    There is no problem with adding those parts so early as it is a much better variator and will have a much longer life than the standard one

    You will see a great improvement riding the bike but you should also buy a variator weight set and try a few different weight roller to see is what will match your riding style
     
  5. bornagain

    bornagain Aerox R 50 yasuni z polini variator 4.9g rollers

    Messages:
    20
    Rides:
    Aerox R, WR125X
    Thanks for the helpful reply! I probably tightened the old nut to something like 60 nm! I have a problem with not knowing my own strength! Lol

    i have a selection of weights from 4.5 to 6
     
  6. AeroxJoe94

    AeroxJoe94 Member

    Messages:
    44
    If you have not got access to a windy gun the buy a torque wrench they are not that expensive and work as they should, when you are jetting if your standard was as you say 60 you normally go for 10% with exhaust with standard airbox so 66

    If you are going to upgrade anything else I would recommend the carb, as they only have small 12mm as standard, but stay away from open air filters as the just cause more problems when trying to get your set up going smoothly.
     
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  7. bornagain

    bornagain Aerox R 50 yasuni z polini variator 4.9g rollers

    Messages:
    20
    Rides:
    Aerox R, WR125X
    Thanks i have a torque wrench. Yes i know to keep away from the air filters. Many thanks! I do have a 66 jet but the thread looks a little short so i used the 68. Better to be rich in my opinion.
     
  8. bornagain

    bornagain Aerox R 50 yasuni z polini variator 4.9g rollers

    Messages:
    20
    Rides:
    Aerox R, WR125X
    My main goal is reliability as it's used for work. Being heavy i need a little more power but the aerox needs to last.
     
  9. bornagain

    bornagain Aerox R 50 yasuni z polini variator 4.9g rollers

    Messages:
    20
    Rides:
    Aerox R, WR125X
    Wow just fitted the parts (exhaust and variator) with the exhaust alone the aerox went off the digital clock @ 50+ mph. Acceleration was good. Now with the new variator and 4.9g rollers it flies. Didn't realise there would be so much difference!
     
  10. bornagain

    bornagain Aerox R 50 yasuni z polini variator 4.9g rollers

    Messages:
    20
    Rides:
    Aerox R, WR125X
    The variator comes with 3 small springs for the clutch. What do these springs do exactly? Is it easy to do?
     
  11. scubabiker

    scubabiker NITROJUNKIE

    Messages:
    7,321
    the springs are for the clutch, the stiffer the spring rates, the higher the RPM the clutch engages at, so say for example the standard ones are like something around 2000RPM (im just making these numbers up!) then you change to stiffer springs, the clutch will engage at like maybe 3000RPM instead. make sense?
     
  12. bornagain

    bornagain Aerox R 50 yasuni z polini variator 4.9g rollers

    Messages:
    20
    Rides:
    Aerox R, WR125X
    I thought it was the main single spring in the clutch which affected the pull off at certain revs?
     
  13. scubabiker

    scubabiker NITROJUNKIE

    Messages:
    7,321
    no, that makes it grip the belt i guess, well it affects it too, but the little springs have more say in it, ask turbovetto to explain it, he is good with this clutch stuff and the words, i just fix stuff after i ride it! now i eat food.
    hulk smash.
     
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  14. bornagain

    bornagain Aerox R 50 yasuni z polini variator 4.9g rollers

    Messages:
    20
    Rides:
    Aerox R, WR125X
    So after these upgrades, bike flies now to 55 mph. I have starting problems, when started from cold and pull away the revs go from 5000rpm to 8000rpm to 5000rpm to 8000rpm for the first 30 seconds when riding whilst on 3/4 throttle. Also started it this morning, had it ticking over for 20 seconds then it cut out and wouldn't start for 5 minutes. When it did start I had to be really careful with the revs otherwise it would conk out. The bike is fine after about a minute once partially warmed up. The joys of making the bike faster, have I lost reliability now? I have down jetted from 68 to 66 (original being 60) But no difference.
     
  15. scubabiker

    scubabiker NITROJUNKIE

    Messages:
    7,321
    Autochoke is on its way out by the sound of it
     
  16. bornagain

    bornagain Aerox R 50 yasuni z polini variator 4.9g rollers

    Messages:
    20
    Rides:
    Aerox R, WR125X
    What? So what's the fix? If any? The bikes brand new! ??
     
  17. AeroxJoe94

    AeroxJoe94 Member

    Messages:
    44
    Put the 68 back in and see if it's better if not turn the tick over screw to give more revs to stop it cutting out, also before riding the bike put it on the stand and let it warm up
     
  18. turbovetto

    turbovetto Well-Known Member

    Messages:
    1,561
    Rides:
    tweaked ovetto
    Hi guys.
    I guess the first thing to do would be to have a look at the plug.

    You're aiming for a brick colour. Grey is too poor. Black is too rich.

    You've just put in a very good exhaust - and generally you need to upjet. However - your exhaust was already de-restricted and some nice person has got rid of that Gurtner piece of crap and put a Del Orto on there.

    So have a look at the plug colour after a good long run. On general principles I would slap a jet with 5 more points than the actual jet you have. I know when I'm getting somewhere when I've made it so rich it won't move. Then I back off on the jet value by two's 'till I can feel no difference between 'It runs great' and 'it runs the same with a slightly bigger jet.

    It's a pain but it really is the best way to go. Don't assume that it runs fine just because it goes like blue shit over a short distance. The trouble starts when it's slightly poor and you've been riding on a long journey and then you decide to cane it on a long straight. Don't ask me why.

    Be very careful with carbs. There is a seal on the float bowl and it's there for a reason. If in doubt, drop the skirt off and work properly - in good light. Same with variators. I suggest a trip to the Pedparts site because they have some good advice on how to avoid the usual pitfalls that we all fall into when we're learning.

    And as Aerox Joe says - let the thing warm up. It's the most important thing where reliability is concerned. If you really have to go, don't cane it. Go slow for a mile or so.

    Good luck !
     
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  19. bornagain

    bornagain Aerox R 50 yasuni z polini variator 4.9g rollers

    Messages:
    20
    Rides:
    Aerox R, WR125X
    Thanks guys, the spark plug now is a lovely biscuity colour with the 66 jet. This morning I decided to "try" and let it warm up, so I started it, gave the revs a little blip and walked away. Within 20 seconds it conked out, went to start it again, started then died on me. Left for 2 minutes(was in a rush), and it wouldn't start. I decided to walk with the bike for 5 minutes, got to a hill, stated rolling then started it, off I went, all fine.
    Basically if I start it and floor it (not ideal) within 20 seconds it runs fine and idles whenever I stop at traffic lights etc. Maybe due to the upgraded exhaust etc and the bike being new the idle needs adjusting.
    Where is the idle screw? I'll adjust it when the bike is fully warmed up. I guessing it's idling at about 2750rpm lol once warm, maybe thats a little low?
     
  20. turbovetto

    turbovetto Well-Known Member

    Messages:
    1,561
    Rides:
    tweaked ovetto
    Probably just the auto choke. The idle screw is the biggest one on the carb and it has a visible spring.
     

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