Page 1 of 3 1 2 3 LastLast
Results 1 to 10 of 26
  1. #1
    ARNYGOLLOTT3's Avatar
    Join Date
    May 2007
    Location
    Biloxi, MS
    Posts
    810

    Rotax Racing Cam

    What exactly does this cam offer over the stock cam...any h.p. increase? Low end grunt, top end pull? Is there any real benefit to stock ECU (8100 rpm) ski running this cam? Are any other mods needed to run it reliably?


  2. #2
    Moderator two2curupt's Avatar
    Join Date
    May 2005
    Location
    Toronto, Canada
    Posts
    2,991
    +1
    41
    around 14 hp.... And better acceleration.. Get the racing ECU..

  3. #3
    REID2168's Avatar
    Join Date
    Jun 2007
    Location
    My House
    Posts
    8,156
    +1
    241
    can this cam be bolted up to a stage III 2007 RXP?

    do u get 14hp over and above what stage III gives?

    is anything else required like timing adjustments or is this piece drop in and go with current timing on 2007 RXP engine from factory with ROTAX Racing ECU installed and 42 injectors, inner cooler, 158 thermo etc.?


    thanks in advance for any help!

    Steve (rides it like he STOLE it) Reid

  4. #4
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    36,398
    +1
    2,524
    Steve, the cam makes more power from 7000 RPM on up no matter what stage of mods you have. The Rotax Racing cam likes to be advanced slightly. You will know you have it right once your compression is 135 psi. It comes alive in this position. Yes, it will fit the 07 skis.

    http://www.4-tecperformance.com/inde...roducts_id=286

  5. #5
    REID2168's Avatar
    Join Date
    Jun 2007
    Location
    My House
    Posts
    8,156
    +1
    241
    how do you advance the timing?

    and how much would you want to advance the timing with a stage three set up?

    how much is the cam?

    do you have to reshim the cam for proper installation/valve lash clearances maybe?

    if so does it come with the specs and can u buy the shims with the cam?

    on my racing fourwheelers u install measure then go get the shims need for proper clearance from HONDA but im NOT sure about this?????

    thanks Jerry!

  6. #6
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    36,398
    +1
    2,524
    You advance the cam timing by rotating the sprocket in its slots. You keep playing with it unti your compression is at 135 and you are good to go.

    The rockers have hydraulic lifters in them so no need to shim or set valvelash.

    The cam is $1290

  7. #7
    REID2168's Avatar
    Join Date
    Jun 2007
    Location
    My House
    Posts
    8,156
    +1
    241
    Jerry are u saying:

    1) take the tension off the cam chain and WITHOUT removing the gear on the end of the cam shaft rotate the chain/cam ONE tooth at a time UNITL achieving 135 psi PER CYLINDER?

    2) if so which way do you start the cam chain rotation so i DONT chase this thing should i decide get one?

    3)one tooth to the left as in counter clockwise movement or one tooth to the right as in clockwise movement?

    thanks Jerry!

  8. #8
    REID2168's Avatar
    Join Date
    Jun 2007
    Location
    My House
    Posts
    8,156
    +1
    241
    last but NOT LEAST is it REALLY WORHT THE PUNCH???????

  9. #9
    GTXX's Avatar
    Join Date
    Jan 2006
    Location
    NW, GA
    Posts
    1,776
    the bolt holes in the cam gear are slotted and the amount adjustment is within these slots. DO NOT advance or retard a tooth on the gear!

  10. #10
    REID2168's Avatar
    Join Date
    Jun 2007
    Location
    My House
    Posts
    8,156
    +1
    241
    so the gear and the chain STAY mated in the same tooth u only turn sprocket on the end of the cam shaft for adjustment to 135 psi then is what u r saying?
    and move WITHIN the slots in the gear on the end of the shaft to find the 135 psi?

Page 1 of 3 1 2 3 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. FS Rotax racing cam 4224
    By FAST RXP in forum Sea Doo Classifieds
    Replies: 3
    Last Post: 11-14-2009, 08:15 AM
  2. Rotax Racing Cam
    By FAST RXP in forum 4-Tec Performance
    Replies: 0
    Last Post: 09-13-2008, 02:57 PM
  3. Rotax Racing Cam F/s
    By FAST RXP in forum Sea Doo Classifieds
    Replies: 1
    Last Post: 07-31-2008, 01:39 PM
  4. Rotax Racing Cam
    By FAST RXP in forum 4-Tec Performance
    Replies: 9
    Last Post: 08-28-2007, 12:46 PM
  5. Rotax Racing cam gear help!!!??
    By psycho rxp in forum 4-Tec Performance
    Replies: 37
    Last Post: 03-26-2006, 03:30 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •