Thread: 07 RXP Throttlebody
12-07-2008, 12:17 PM #1
07 RXP Throttlebody
Just pulled mine off and am sending to Ross to get them cleaned up.
This was a big deal on our Yamahas. I hope it helps my four stroke.
I did a base line in a very small lake. Friday afternoon, temps around 75.
Rxpx prop with 2 millimeters taken out.
Seat off fuel on buzzer standing stright up 8100 rpms @73.5.
Yesterday with full tank, seat on and carring my son 7900 rpms.
The lake test will be very easy to duplicate. There was just enough room to see the 8100 and then you had to let go of the gas.
12-07-2008, 12:23 PM #2
cool, let us know how that works out Mark
12-07-2008, 08:59 PM #3
got me all confused with these plurals and THEMS in regards to 4-tec throttle bodies... u got a RXP with more than one throttle body??? just bustin ur chops...
anyway... what are you "cleaning up" exactly or looking to do?
just boring it out or trying something more than boring it out and replacing the butterfly?
12-07-2008, 09:03 PM #4
here's a pic of mine...compare the sizes of the butterflys that's where you see the difference... camera doesn't really capture the job too well
12-07-2008, 09:38 PM #5
12-08-2008, 02:01 PM #6
All I know is he did not make them any bigger for the gprs. They hit harder everywhere though.
I sent them today.
12-08-2008, 02:05 PM #7
can't wait to hear Mark!! always reading incredible reviews about his GPR sonic booms. something new with these skis everyday
12-08-2008, 02:09 PM #8
12-08-2008, 02:12 PM #9
they been gettin run for quite a few years... all the Les Cook skis and JD1's skis have the bored out throttle bodies... rapidacceleration had a few big bore TBs made a couple years back...
guy does REALLY -- REALLY nice work on the 4-tec TBs, he's been around awhile
12-08-2008, 05:10 PM #10
Will a bored out throttle body need a programmable ECU to work properly with the air sensor? or can it be run with stock/Riva/Rotax ECU?
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