Ski GP3 · Any water
Ski GP3 - Factory Pipe 701 build, IHRA
A spec is filled on 3 of 6 line items and the reasoning on 6. The document behind the figure is named on 3 of the filled specs.
Treat these settings as a starting point, not a tested setup.
Conditions this is written for
- Class
- Ski GP3
- Venue
- Any water
- Water
- Does not depend on condition
- Conditions note
- The pipe, cooling, torque figures and carburettor baseline are the same in any water; the choices that do depend on it are the ones left blank.
- Rider weight
- Not stated
- Machines
- Yamaha SuperJet 701 round-nose (1996-2007)
- Last raced
- Never recorded
Drawn heavier and labelled "on sheet": the impeller and ride plate, the lines of this sheet that sit on the jet pump. This is where each kind of part sits, drawn fresh from patents rather than from any one maker's pump.
How we know: US patents 8,905,800 (lines 64 to 70 of the held copy), 5,833,501 (lines 67, 91, 93 and 94), 5,520,558 (line 48), 6,705,908 (lines 36, 39 and 89), 6,857,919 (line 194) and 6,523,489 (lines 185 to 187).
Not to scale.
Parts manifest
| Item | Spec | Why | Get it |
|---|---|---|---|
| pipe | no spec Limit: IHRA 2026, M.6.2.1.2 · read the rule | M.6.2.1.2 permits a manufactured, designed and sold wet pipe on a SuperJet running the 701 and forbids converting a dry pipe into one. Factory Pipe names no SuperJet product a wet pipe, does name one "SuperJet Dry", and lists a dry manifold in the 701 kit. Confirm the model with Factory Pipe before buying anything else on this sheet. Fitting the 760 removes the allowance, because that option requires the exhaust to remain stock. | Price on request Ask about the Factory Pipe exhaust, Yamaha SuperJet 701 |
| cooling | Dual cooling, two water feed lines from the pump Factory Pipe's own instruction sheet: 701 SuperJet Type 9 installation instructions (PDF) | Not optional and not a performance choice. Factory Pipe states that the Type 9 system requires dual cooling, that the boat must be set up for it before the system is run, and that failure to run dual cooling can result in serious engine damage. It names RIVA Yamaha kit RY1013-SJ with drill bit RY1013-D as a way to add it and says to install that kit to RIVA's instructions. It also warns specifically not to change the 1/2 inch fitting in the manifold, which is required for proper engine cooling, even though the supplied 3/8 inch waterline fits over it. | Not stocked here |
| carburettor jetting | Main 135, pilot 75, needle and seat 1.5, stock spring, low speed screws 1 turn out from closed Factory Pipe, 701 SuperJet Type 9 installation instructions (PDF), carburettor jetting section, for a 1996-up dual carb | Factory Pipe gives this as a baseline and bounds it tightly: sea level, a complete stock engine, aftermarket flame arrestors, and a minimum of 92 octane. It says your adjustments may vary with modifications, fuel, altitude and other variables, and to consult a qualified technician if you are not familiar with tuning a carburettor. It also declines to give any jetting for a Limited or Superstock application, on the grounds that it cannot anticipate the possible combinations, so do not read these numbers as covering a built motor. TWO THINGS THIS SHEET CANNOT TELL YOU. The high speed screw setting is printed as a fraction that is illegible in our copy, so the number of turns out is not given here rather than guessed at; read it off the instruction sheet. And the kit's own bill of materials includes a #120 Mikuni main jet as part of the chamber assembly while this table lists 135 as stock, and the document nowhere says to fit the supplied jet. Ask Factory Pipe which applies with the pipe on. | Not stocked here |
| fastener torque | Exhaust manifold bolts 18 ft-lb, front mount nut 28 ft-lb with Loctite 242, rear head bracket 22 ft-lb Factory Pipe, 701 SuperJet Type 9 installation instructions (PDF), manifold and chamber installation sections | Two manifold bolts cannot be reached once the manifold is on. Factory Pipe's order: start those two in the lower inside holes through the gasket, only until the manifold slides on; fit it; then the flanged pair top inside, stock bolts elsewhere. | Not stocked here |
| impeller | no spec Limit: IHRA 2026, J.18.2 · checked against the rulebook on 2026-09-07 · read the rule | Solas publishes a fitment list rather than a ranking and states that the right pitch depends on the engine, the rider's weight and the water. A pipe moves where the engine makes its power, which is where a stock pitch stops being the answer and no manufacturer gives a number. Ask a racer who runs the class. Options: Solas Concord for the SuperJet 701 in the 144mm pump: YB-CD-13/17, 14/18, 15/19 and 16/20. Confirm against Solas's own finder before ordering. | Price on request Ask about the Solas impeller, Yamaha SuperJet 701 |
| ride plate | no spec Limit: IHRA 2026, J.18.1 · checked against the rulebook on 2026-09-07 · read the rule | Which plate inside the rule's limits suits a given rider is a handling preference nobody publishes a figure for. | Price on request Ask about the RIVA Racing ride plate, Yamaha SuperJet |
The 3 parts we list on this sheet travel with your message. We answer line by line, or say we do not know.