04-05-2011, 07:56 PM #1
- Join Date
- Mar 2011
- Dalton, GA
Questions about aftermarket parts 07 Ultra 250
I'm just a weekend rider who wants a fast ride. I've always had an Ultra 150 modded and it was extremely fast for a 2 stroker. Just purchased a 250x and would like to know what parts you guys think are the most important to gain some top speed. Got a rival on the lake with a modded 08. I'd just like not to get embarrassed. BTW my old Ultra 150 would almost keep up (GPSed at 72 mph) Just lookin for a short list of the most important mods from the experts.
04-07-2011, 11:18 AM #2
Search is your friend.......... theres plenty of info on here, spend a little time looking around then come ask questions............
04-07-2011, 11:45 AM #3
04-07-2011, 07:14 PM #4
04-07-2011, 08:38 PM #5
04-08-2011, 01:09 AM #6
I now keep ski stock but my impression on biggest bangs for 250 bucks are as follows:
Riva ride plate: 1 to 3 mph (I got 3 mph gps in flat calm) but less stability in rough;
1 to 2 deg wedge: 1 to 2 mph in calmer conditions but less hook-up in rough;
Plug ride plate holes, clean out all excess silicone: .5 to 1.5 mph;
Advance timing: 1.5 to 3mph;
Clogged intercooler: -68mph
Pump bearing failure: -68mph
Exhaust: 0 to 1mph
Pulley, fuel injectors, ECU, turbo etc.: outside my paygrade
TN 250, good to see you back.
04-08-2011, 07:25 AM #7
Lol, this is pretty accurate. Also do the double bottom intercooler mod and air vent mods to get air into your hull. These should get you into the 72 mph range and still be reliable. Change your oil alot if you can't find a catch can. If you ride in rough water, skip the riva plate and go TBM or R&D. You can also modify your intake grate for more hookup.
04-08-2011, 08:58 AM #8
- Join Date
- Mar 2011
have done everything in rva ugrade just finish water box (used 2008 upgrade water box) and 2007 free flow exhaust testing today ride plate and intake grate did the most for speed 2 to 3 mph and take off did not get anything changing the power filter kit thinking about filling the holes in ride plate read to use jb water weld can u get it back out if needed
04-08-2011, 09:21 AM #9
04-08-2011, 09:45 AM #10
I have a riva plate, 6 degree timing advance with repitched prop, 2 Degree pump wedge, 15f cams, r&d powershot(new in package), riva exhaust with macc modified open class waterbox, and an impros modified pump that I am selling. Prices are reasonable, if you want to save a little money. All parts are in great shape. Everything has to go. I'm into a new project.
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