no of teeth on a 180 gear compared to 125

Discussion in 'Maxiscooter Tuning' started by shiny red, Jan 27, 2009.

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  1. shiny red

    shiny red New Member

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    1,224
    does anyone know the differance ,i do not want to have to take a gearbox apart to c0unt em, not the ratios just the no of teeth or is there another way of telling a 125 gearbox from a 180 :D
     
    shiny red, Jan 27, 2009
    #1
  2. CU*TSPEED

    CU*TSPEED New Member

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    394
    YEAH ITS SLOWER
     
    CU*TSPEED, Jan 27, 2009
    #2
  3. Purplepill

    Purplepill Member

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    801
    It would seem so :msn1:
     
    Purplepill, Jan 27, 2009
    #3
  4. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    et2 monster
    erm, not off the top of my head (try'd the manual? geard bikes have ratio info, just look at the final drive, work out the secondary reduction on normal gears then minus from the final drive) or count them ya lazy feka
     
    MiNoR cOnFuSiOn, Jan 27, 2009
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  5. CU*TSPEED

    CU*TSPEED New Member

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    394
    gaz i got a 125 gearbox in the shed if you want me to count the teeth?
     
    CU*TSPEED, Jan 27, 2009
    #5
  6. shiny red

    shiny red New Member

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    1,224
    yeah if ya could joe save me a job :D
     
    shiny red, Jan 27, 2009
    #6
  7. CU*TSPEED

    CU*TSPEED New Member

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    394
    42 ON THE SHAFT COG :punk:
     
    CU*TSPEED, Jan 27, 2009
    #7
  8. shiny red

    shiny red New Member

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    1,224
    goodman :punk:
     
    shiny red, Jan 27, 2009
    #8
  9. reddwarf

    reddwarf New Member

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    79
    Sort of keeping things in the same vein , but this is a real basic way ,what we end up doing to keep all the sixteen year olds happy , is to remove the side case then mark the clutch bell and a mark on the wheel , when you turn the wheel one full rotation the clutch bell will turn whatch the mark on the cluch bell and count how many times it turns for one rotation of the wheel, we do this and make a note of the ratio on the peds we get in ,so when they say (has it got a gear up kit init cause my mate said it has ,with out to much hassle we can say NO so give us your money and we will fit one, But you can allso work out by measuring the tyre circum what percent say a taller tyre on the rear will give you ect :cool:
     
    reddwarf, Jan 27, 2009
    #9
  10. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    ye, easiest way by far.. altho working out the 2 diff gearsets from the final drive gets a littlke complicated.. there is a top speed calculator nbocking around somwhere. basicly you enter your tyre info final drive and max rpm and it will work out what speed is attainable. you can work it out yourself like red said, simply work out the circumfrance, times this by the rpm and devide by 60 you have the metres/feet per second (depending on what unit your first messure with). prob arises when you ont have the power to pull the speeds attainable.. or even trying to work out the reduction/increase in ratio across the variator/belt at full chat as it takes some messurment, some working out and alot of head scratching. if you attempt this use the MIDDLE of the belt as a centre point on the pulleys at both top and bottom, will only get it wrong if you run to the top or bottom of the belt

    but ye, theory is usefull, nohting beats takin it apart, looking ast it, putting it back together and riding it. anybody worth there reputation will tell you this
     
    MiNoR cOnFuSiOn, Jan 28, 2009
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  11. reddwarf

    reddwarf New Member

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    79
    True ,working out gear ritios can be a pian and as minnor said the best way is to bolt it on and try it ,I at the moment am running 3 diferent gears from 3 diferent bikes ,just to try the fine balance between power and top speed
    and to get it all in the 1/4 mile it can easly be over done
     
    reddwarf, Jan 28, 2009
    #11
  12. Blue dwarf

    Blue dwarf New Member

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    342
    125 primary gears are 12/32 (12 being the clutch shaft)
    180 primary gears are 13/30 ( 13 " " " " " ).
     
    Blue dwarf, Jan 28, 2009
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  13. shiny red

    shiny red New Member

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    1,224
    thanks all :beer:
     
    shiny red, Jan 28, 2009
    #13
  14. erea

    erea Member

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    65
    i counted them before but was a while back cant remember the numbers now but pretty sure that 125 gears have lil circles going around on the cog and 180 are just full i have a 180 inline gearbox downstairs if you still need any more info shiny :cool:
     
    erea, Feb 1, 2009
    #14
  15. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    ive had a few diff gearsets tbh.. im wondering how different the old shape gears are to the new shape gears? theres a question.
     
    MiNoR cOnFuSiOn, Feb 1, 2009
    #15
  16. nrgandy

    nrgandy New Member

    Messages:
    2,180
    hmm i wonder minor.
    anyone fancey sending me some new shape gears all my engines are old shape
     
    nrgandy, Feb 1, 2009
    #16
  17. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    oh an reddwarf. leave the longest in there, diff ramp angles roller diameters and contra spring's to gain the best pull.. if you get flatspots at certian speeds and you cant trim them out you need to play wiht the torque drive ramp's.. using bigger pins means you can machine the ramps excentrically.. or just cut new ramps. you want a constant rate except in the case of flat spots with the best possible combi of transmission setup. then alter the angle at your estimated point of power drop.

    ive been quizing the guy at the auto gearbox specialist(luckily he';s next door) and considdering he has fuck all experience with scooters he has opend my eyes to a few things.. none of wich i fancy sharing atm LOL but ye, the torque pressure and rate is VERRY important, aswell as a good ramp angle roller diameter and spacing.. even belt thickness and length can becom a factor (ye they all say 125/180 but ive got 3 diff length belts infront of me, all new)
     
    MiNoR cOnFuSiOn, Feb 1, 2009
    #17
  18. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    new shape gears wont go in an old shape case.. everythings diff.. the imput shaft support bearings are in diff places (outer is inner and vice versa) also the output shaft is pressed differently.. mabey a diff shaft, never really compaird
     
    MiNoR cOnFuSiOn, Feb 1, 2009
    #18
  19. seanwhite06

    seanwhite06 New Member

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    358
    Rides:
    runner 172, zx6r
    yea they do, ive done it,

    aslong as you transfer the whole lot , and space it prop with the right amount/thickness of thrust washers!

    and use the appropriate gear plate!
     
    seanwhite06, Feb 2, 2009
    #19
  20. reddwarf

    reddwarf New Member

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    79
    We"ve always said that a polini 180 belt is longer than a mallossie 125/180 beld .How can you run the same belt (lenght and width) on a 180 variator as on a 125 veriator . Over the past 4 years we have been tacking carfull measurments of gears belts ,variators ect on both two strokes and four strokes , The thing is try and get the whole thing from a standig start to 1/4 of a mile 440 yards (i think) at the best possible time and the best possible
    speed , its ok on paper its ok on the dyno but at the end of the day its got to be done on the road or strip , OH the joys of two strokes , this sunday (
    we went up to pod for a quick test day (in the snow) and pete took a new pipe he made and bang 5 mph more , so do you change the ramp angles ,the torque spring ,the rollers, the belt ? the thing is how do you know you have got the best out of your ped ???? YOU DONT ;)
     
    reddwarf, Feb 2, 2009
    #20
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