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Thread: 125m cam options

  1. #1
    Join Date
    Jul 2017
    Location
    Georgia, USA
    --
    11

    125m cam options

    Will the 110 atc cam work in a 125m head? Sorry if this is an obvious question but I searched and couldn't find much at all regarding the 125cc engine. Wanna use the Dr. Atv performance cam in this engine with a bigger carb and port/polish job.

    Sent from my SM-G930V using Tapatalk
    '83 110
    '85 125m (just need a couple things to have it romping)

  2. #2
    Join Date
    Jul 2009
    Location
    South Florida
    --
    6,722
    No the 110 cam will not work in a 125m , timing is different .
    WEB cams used to sell a performance cam for the 125m if your looking for an upgrade .
    78 atc 90/180cc Dickson Full Suspension
    76 ATC90/180cc Nicholson
    77 atc 90 Dickson Full Suspension
    84 KLT 110/123cc Powroll Racer from 80s
    87 atc 125m stock
    84 atc 200x Curtis Sparks
    84 atc 200x Powroll My race bike from 80's
    83 atc70/108cc Powroll blue Xmas Special
    81 atc185s HP-ATC full suspension

    Performance Shop is Open PM me for Service

    My Feedback http://www.3wheelerworld.com/showthr...ck+shortline10

  3. #3
    Join Date
    Jul 2017
    Location
    Georgia, USA
    --
    11
    Thanks shortline! I assumed something was different or else someone would have already done it by now. I'll check into Web cams.
    So if I were to do a cam, intake, exhaust, bigger carb and shave the head would the transmission stand up to the added power?

    Sent from my SM-G930V using Tapatalk
    '83 110
    '85 125m (just need a couple things to have it romping)

  4. #4
    Join Date
    Jul 2009
    Location
    South Florida
    --
    6,722
    The 125m motors have a very restrictive head design so making extra HP is difficult .
    I have done the Web cam and DG performance exhaust upgrades and it was a noticeable power increase .
    Heads can’t be shaved because of the design , transmission will hold the power , the biggest manufacturer defect on that motor is the shift drum stopper boss that will break off if stressed !
    78 atc 90/180cc Dickson Full Suspension
    76 ATC90/180cc Nicholson
    77 atc 90 Dickson Full Suspension
    84 KLT 110/123cc Powroll Racer from 80s
    87 atc 125m stock
    84 atc 200x Curtis Sparks
    84 atc 200x Powroll My race bike from 80's
    83 atc70/108cc Powroll blue Xmas Special
    81 atc185s HP-ATC full suspension

    Performance Shop is Open PM me for Service

    My Feedback http://www.3wheelerworld.com/showthr...ck+shortline10

  5. #5
    Join Date
    Jul 2017
    Location
    Georgia, USA
    --
    11
    Hmmmm. Could a 110 head be fitted with a little ingenuity? Just curious. Again, I'm still learning.

    Sent from my SM-G930V using Tapatalk
    '83 110
    '85 125m (just need a couple things to have it romping)

  6. #6
    Join Date
    May 2013
    Location
    Brownsville, Tn.
    --
    1,271
    110 Head will not fit the 125.

    125 Ported Head
    https://www.ebay.com/itm/15407676151...84.m1555.l2649
    * 1978 ATC 90/180 Pauter PJ1 / Springer "Team BAPP" Bike *

    * 1980 ATC 110/180 "Danny's Machine Works" 3D Sprint Dune Bike *

    * Nicholson 500 Race Bike *

    * HPATC Yamaha RD350 "Big Moe" Trike *

  7. #7
    Join Date
    Apr 2014
    Location
    Edmond, KS
    --
    2,531
    That head looks good.

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