Results 1 to 8 of 8

Thread: top speed low

  1. #1

    Join Date
    Sep 2013
    Location
    Charlotte, NC
    Posts
    15

    top speed low

    I did my first run of the season yesterday with some new mods and my top speed seems low for the mods I have. Listed mods below.

    Last year I ran 71.4mph air temp was around 80 degrees
    -RIVA INTAKE
    -INTAKE MANIFOLD SPACER
    -R3 REFLASH
    -FREE FLOW EXHAUST
    -R&D INTAKE GRATE
    -STOCK PROP REPITCHED TO 12/17

    This season with new mods I ran 72 air temp was around 65 degrees
    -RIVA ENGINE/INTERCOOLER COOLING KIT
    -RIVA WATERBOX
    -SKAT PROP 14/18


    IS THIS PROP PITCH HOLDING ME BACK? I FEEL LIKE I SHOULD BE EASILY IN THE MID 70s????


  2. #2
    Ale's Avatar
    Join Date
    Feb 2014
    Location
    ITALY
    Posts
    825
    +1
    57
    why not upgrade supercharger?

  3. #3
    JFizzleJR's Avatar
    Join Date
    Aug 2005
    Location
    FL
    Posts
    8,628
    +1
    808
    Hi Matt,

    What RPM are you seeing?

    Quote Originally Posted by mhagley View Post
    I did my first run of the season yesterday with some new mods and my top speed seems low for the mods I have. Listed mods below.

    Last year I ran 71.4mph air temp was around 80 degrees
    -RIVA INTAKE
    -INTAKE MANIFOLD SPACER
    -R3 REFLASH
    -FREE FLOW EXHAUST
    -R&D INTAKE GRATE
    -STOCK PROP REPITCHED TO 12/17

    This season with new mods I ran 72 air temp was around 65 degrees
    -RIVA ENGINE/INTERCOOLER COOLING KIT
    -RIVA WATERBOX
    -SKAT PROP 14/18


    IS THIS PROP PITCH HOLDING ME BACK? I FEEL LIKE I SHOULD BE EASILY IN THE MID 70s????

  4. #4

    Join Date
    May 2009
    Location
    Nashville, Tn
    Posts
    788
    +1
    90
    Need a plate. Stock plate is a boat anchor. What RPMs are you turning?

  5. #5

    Join Date
    Sep 2013
    Location
    Charlotte, NC
    Posts
    15
    Quote Originally Posted by nashvegas View Post
    Need a plate. Stock plate is a boat anchor. What RPMs are you turning?
    I know a ride plate is good for a couple mph but even with out that I feel i should be atleast 74mph.

    I need a tachometer bad! Before the cooling upgrades and new prop I was turning 8400rpms. Going by the gauge yesterday it looks like I am turning around 8300 with the 14/18 pro pitch.

  6. #6
    fx160's Avatar
    Join Date
    Nov 2005
    Location
    gold coast australia
    Posts
    2,409
    +1
    193
    With the same parts as you and stock prop
    Motec instead of R3 I ran 76 mph
    That was with a VX plate though
    So 72 with stock plate
    So I don't think your far off

  7. #7
    Just relax and enjoy the ride. XLT Chad's Avatar
    Join Date
    Jan 2011
    Posts
    1,284
    +1
    116
    Step one is to get a hold of a good Tach.(the stock one is crap) At 14/18 with an R3 you are probably banging the shit out of the limiter. Get a good reading of your RPM's and go from there. My guess is you'll need to tweek your pitch up a couple of degrees.

    Also, make sure and throw a fresh set of plugs in it. ( couldn't hurt )

  8. #8

    Join Date
    Sep 2013
    Location
    Charlotte, NC
    Posts
    15
    Quote Originally Posted by XLT Chad View Post
    Step one is to get a hold of a good Tach.(the stock one is crap) At 14/18 with an R3 you are probably banging the shit out of the limiter. Get a good reading of your RPM's and go from there. My guess is you'll need to tweek your pitch up a couple of degrees.

    Also, make sure and throw a fresh set of plugs in it. ( couldn't hurt )
    It doesnt feel like its on the limiter at all... going from a 12/17 to a 14/18 should have brought it down 200 rpms and i was never on the limiter ..

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Modded Raider top speed low?
    By Raider1200 in forum Yamaha Old School Skis
    Replies: 1
    Last Post: 06-07-2014, 06:50 AM
  2. Replies: 46
    Last Post: 08-17-2013, 08:30 PM
  3. SHO stock top speed low ?
    By SXMSHO in forum Yamaha PWC Performance (4-stroke)
    Replies: 10
    Last Post: 07-28-2009, 12:58 PM
  4. Top speed is low
    By ventrj in forum 4-Tec Performance
    Replies: 6
    Last Post: 08-26-2007, 04:39 PM
  5. 2005 GP1300R low top speed
    By Spager in forum Yamaha PWC Performance (2-stroke)
    Replies: 17
    Last Post: 12-09-2005, 12:07 AM

Posting Permissions

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