//ArrowChat Code
Results 1 to 13 of 13

Thread: Which cam for a 200 series atc?

  1. #1
    Join Date
    Aug 2018
    Location
    Little Rock, Arkansas
    --
    40

    Which cam for a 200 series atc?

    Im running a 200 jug, 10.25:1 piston, ported head, oval ported 26mm carb, a mild cam, and a 40% reduction on 25s. Im stumped on which cam i should run. I want top end power put i dont want to lose my lowend grunt. Used mainly for fast paced trail riding and mudding.

    Ive attached i picture of cams offered by both megacycle and web cam. Lets hear yalls experience and opinions
    Click image for larger version. 

Name:	20190715_221057.jpg 
Views:	146 
Size:	882.8 KB 
ID:	259326
    Last edited by Laredo; 07-15-2019 at 11:58 PM.

  2. #2
    Join Date
    May 2006
    Location
    The Open Road
    --
    4,729
    I used the 143-20NS Megacycles grind on a 200X. Huge improvement overall. I don't feel like I lost any noticable bottom end with that cam

    Sent from my Z958 using Tapatalk

  3. #3
    Join Date
    Aug 2018
    Location
    Little Rock, Arkansas
    --
    40
    143-20NS thats the needle bearing setup right? Is it worth the extra change. When I called and talked to megacycle the lady seemed to think the needle bearings were a bit excessive.

  4. #4
    Join Date
    May 2006
    Location
    The Open Road
    --
    4,729
    Quote Originally Posted by Laredo View Post
    143-20NS thats the needle bearing setup right? Is it worth the extra change. When I called and talked to megacycle the lady seemed to think the needle bearings were a bit excessive.
    Yes it's needle bearing journals.

    I sprang for that setup ($600 all told) because I was building a high rev flat track/tt purposed ATC200X... For aggressive trails and mudding, the standard 143-20 cam should be more than enough as long as you keep the oil changed and filter screen clean. Those little 200s can become starved for oil on the topend pretty easily if you don't take care of your machine and the cam suffers the most

    Sent from my Z958 using Tapatalk

  5. #5
    Join Date
    May 2006
    Location
    The Open Road
    --
    4,729
    Edit to add, I also rode that machine in the woods after I changed the chassis/tire setup so I could trail ride at Trikefest. I can assure you that the cam was also well suited for aggressive woods riding (Haspin Acres terrain which is very diverse and fairly technical in places)

    Sent from my Z958 using Tapatalk

  6. #6
    Join Date
    Aug 2018
    Location
    Little Rock, Arkansas
    --
    40
    Sweet ive been leaning toward either the 143-20 or the 143-40, but im afriad of going too big. Know anyone running web cams particularly the 172 grind (.395 lift) or the 214 grind (.375 lift). I keep getting mixed reviews curious if anyone actually runs it.

  7. #7
    Join Date
    Jul 2009
    Location
    South Florida
    --
    6,722
    The 395 lift cam has always been a good all around performance cam and in combination with a high compression piston will make plenty of bottom end power still .
    When you jump up to the 435 lift you need a 12-1 compression piston to get its full potential and your into the realm of full race performance .
    Imo the 395 is the way to go for a peppy trail rider .
    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

  8. #8
    Join Date
    Aug 2018
    Location
    Little Rock, Arkansas
    --
    40
    Sweet, thanks shortline. im curious I have a nos set of rockers i saw web cam offers hard facing. Is it necessary or just overkill?

  9. #9
    Join Date
    Jul 2009
    Location
    South Florida
    --
    6,722
    I raced a 200x for 4 seasons back in the 1980s and put a lot of hard race hours with a 435 megacycle cam and never had a stock OEM rocker fail . We did change the oil after every race day so I’m sure that helps .
    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

  10. #10
    barnett468 is offline FACT ! I have no edit button Arm chair racerThe day begins with 3WW
    Join Date
    Jan 2013
    Location
    minnesota
    --
    5,911
    Quote Originally Posted by Laredo View Post
    Sweet, thanks shortline. im curious I have a nos set of rockers i saw web cam offers hard facing. Is it necessary or just overkill?
    Use very good oil.

  11. #11
    Join Date
    Aug 2018
    Location
    Little Rock, Arkansas
    --
    40
    Thats what i needed to know. Thanks again.

  12. #12
    Join Date
    Aug 2018
    Location
    Little Rock, Arkansas
    --
    40
    Barnett what kind of oil do you run? Ive been running Gn4 10W-40.

  13. #13
    Join Date
    May 2006
    Location
    The Open Road
    --
    4,729
    The guy at Megacycles told me it wasn't necessary on a 200X when I asked about hard facing mine.

    After about a hundred hours of beating on it, I got to see the rockers and they looked great. We did run a zinc additive in the oil, though

    Sent from my Z958 using Tapatalk

//ArrowChat Integreation Code //