Acceleration/rollers (HELP)

Discussion in 'The Workshop' started by matthewl, Sep 11, 2008.

  1. matthewl

    matthewl New Member

    Messages:
    133
    Hi
    Im new here
    i have a malaguti f15 firefox

    but i have a problem with it.
    from 30 to 40kmh there is a flat spot where i get very little acceleration. when it gets to 40kmh it accelerates very strong.

    the scooter has been de restricted and has a racing exhaust and jets to sute.

    do you lot know what the problem is?

    cheers
    matt
     
  2. WOLFFY

    WOLFFY New Member

    Messages:
    4,135
    Rides:
    Runner 172
    Drop the roller weight.
     
  3. Vesta

    Vesta New Member

    Messages:
    2,615
    My NRG used to do this with standard variator and rollers.

    Put fresh rollers in at a lower weight and it was miles better :)
     
  4. Saint Jonny

    Saint Jonny New Member

    Messages:
    1,048
    it is kph you mean, not mph right? Either way minerelli stock transmissions are crap, i'd get a new variator then experiment with roller weights (check out aerox's with similar spec for ideas) Clutch springs need changing too. What pipe you running?
     
  5. matthewl

    matthewl New Member

    Messages:
    133
    what pipe am i running? ahhh some crap one. it came with the bike
    i think its this
    http://motorcycleproducts.co.uk/catalog ... 24718.html

    it works quite well but it could be better.
     
  6. Saint Jonny

    Saint Jonny New Member

    Messages:
    1,048
    Well i guess if you want to leave the bike near stock, thats okay, but if you start getting ideas then it would be better to get something to match the tune ;)
     
  7. matthewl

    matthewl New Member

    Messages:
    133
    aye i know
    i quite like the look of a few of these non street legal ones. but i think they might be abit risky
    its a good exhaust
    the scooters been de restricted and with that exhaust on i can get ab out 83kph donw hill lol
    iv got a suspicion that it is restricted somewhere else. because it bounces off something at 72kph but you can go past it to about 80 then when you slow down and get to 72 ish it kicks in again o_O


    im looking into getting a 70cc kit
     
  8. Saint Jonny

    Saint Jonny New Member

    Messages:
    1,048
    check out Swifts exhaust barrel matching guide for ideas, personally i'd get a malossi MHR Replica on a yasuni city 16 (derestricted of course) and a 21mm carb, then uprate things as you see fit afterwards, would be a mental Malaguti or one fiery fox :D
     
  9. matthewl

    matthewl New Member

    Messages:
    133
    hahaha you mucky man ;)
    id love this bike to be mad!
    im sick of lads in saxos and golfs trying to race me!
    im like its a scooter im not going to be able to keep up.

    id love to see there faces when i boot past them!

    whats this? is it like an online manual? have you got a link to it if it is?
    i like my exhaust me :) its nice not silly loud and it doesnt sound like a wet fart lol but..... the time will come when i need to change it to get more wild powers ;)

    21mm carb i like the idea of that but there quite expensive! :(
    would be nice like.
     
  10. Dec

    Dec Active Member

    Messages:
    3,183
    Rides:
    nothing ugm
    there 50 quid mate, TOPS
    if you int gonna splash out, leave your bike stock itll only fuck up as you wont be able to tune it properly and set it up correctly, and wont be able to fix it in the long run with no cash when it fucks up (which it will garunteed), trust me ive been there. trying to tune a ped with no money does NOT work.
     
  11. Saint Jonny

    Saint Jonny New Member

    Messages:
    1,048
    Dude Dec Rosi hit the nail on the head, my personal (and the correct really) way of doing things will be to save up all the money for everything THEN go and make my bonzai Booster, can't go about bolting parts on at random cause it will not work. The guides link is here...

    http://www.scootershack.co.uk/viewtopic.php?t=2948

    Hope this helps
     
  12. matthewl

    matthewl New Member

    Messages:
    133
    i work :) im on weekly pay so il always have cash coming in
    i get a lift off my dad so i dont ride the ped there
    i thaught they were like £70+
     
  13. matthewl

    matthewl New Member

    Messages:
    133
    im not going to go around bolting stuff on as soon as i get it
    i said in that messege im going buy things every week.
    not bolt them straight on lol thats silly
    il keep everything in my celler or something untill i get everything i need then bolt it onto the ped,
     
  14. Saint Jonny

    Saint Jonny New Member

    Messages:
    1,048
    Yeah get a plan of everything you'll want and stick to it, could always just rip a good aerox's spec sheet and fit everything off it onto yours no names mentioned ;) Would work a treat.
     
  15. matthewl

    matthewl New Member

    Messages:
    133

    OOOOOO ;) sounds like a plan! :p
    il have a look at your project thread more in detail,
    im off home now il get them photos taken tonight.
    pm me.
     
  16. DYS VTR

    DYS VTR New Member

    Messages:
    1,757
    Rides:
    skanky cRaKwhoR3s
    IF ur going to tune it, just buy a polini sport, decent vari/belt/rollers, and a 17.5 or a 21 if urs is a 12mm standard. then ull have a reliable bike plus u wont have to change the crank, which would be a BIG job for u, its just not worth it in ur case and ull be more than happy with a sport set up
     
  17. Saint Jonny

    Saint Jonny New Member

    Messages:
    1,048
    I personally wouldn't touch a crank cause if you fuck that up, the whole bike could be wrecked, hence why thats all i'm gonna have fitted (50 quid fitting ain't bad tbh), and a sports setup is good for pocket money fun too especially if there isn't a big tuning scene locally ;)
     
  18. matthewl

    matthewl New Member

    Messages:
    133
    what sort of power would i be looking at from this setup?
     
  19. Dec

    Dec Active Member

    Messages:
    3,183
    Rides:
    nothing ugm
    about 8-9 bhp from a well setup example. with a good bottom end punch ;)
     
  20. matthewl

    matthewl New Member

    Messages:
    133
    oooo! :)
    just had a look on the net and it doesnt look like it will cost much to get all the parts.
    think the exhaust is the most expensive part
    iv got a exhaust on mine now do you think it would work okay with this? http://motorcycleproducts.co.uk/catalog ... 24718.html or not?
     

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