Fits: Yamaha GP1800R SVHO (send-in ECU calibration).
What this is
An ECU calibration for the GP1800R SVHO, developed in Toronto on our own ski with help from Yamaha engineers in Europe. We write it to your own ECU and return it by overnight shipping.
Increase your top end speed with no modifications other than our tune. Stage 1 with the 1000 RPM increase will see 75-80 mph depending on conditions. Owners report a ski that topped out at 69 mph before the tune now showing 78-80 mph regularly, with noticeably more power and a full summer of use without issues.
Tune options
| Option | Target and output | Required mods and fuel |
|---|---|---|
| Stage 1 | More top-end speed with no modifications other than the tune; 75-80 mph with the 1000 RPM option, depending on conditions. | 93 octane minimum; race fuel or an E20 blend on 93 suggested. |
| Stage 2 | Email us with your ski and modifications before ordering so we confirm it suits your setup. | 93 octane minimum; email us with your ski and modifications before ordering. |
Email us before ordering Stage 2 so we can confirm it suits your ski and modifications.
Options explained
- No: the OEM rev limit stays.
- 1000 RPM extra redline: 8000 RPM, which Yamaha engineers told us the OEM valve springs are engineered for.
- 1250 RPM extra redline: 8250 RPM; we have tuned there on OEM springs but do not suggest it, and we suggest upgraded valve springs.
- 1500 RPM extra redline: the highest option, above the 8000 RPM the OEM springs are engineered for; upgraded valve springs suggested; email us before ordering.
- Custom requests: the full factory definition (damos) for this ECU lists every map, so custom requests are possible; email us.
How it works after you order
- Order your stage and RPM option.
- Email info@n75motorsports.ca with your ski and modifications for shipping instructions.
- Ship your ECU to us in Toronto.
- We load the calibration. We ship your ECU back to you by overnight shipping.
Calibration features
Developed in Toronto with the full factory definition (damos) for this ECU; click the badge to verify our WinOLS licence with EVC.
- Made to get the most out of the ski without stressing the engine and powertrain.
- Other than raising the rev limit, we do not disable ECU safeties or OEM protections.
Before you order
- Fuel: 93 octane minimum; race fuel or an E20 blend on 93 suggested for longer engine life.
- Stage 2 and custom requests need an email first.
- Your ski is without its ECU while we have it.
FAQ
Do I send you my ECU?
Yes. Ship it to us, and we return it by overnight shipping.
Which RPM option should I choose?
1000 RPM gives 8000 RPM, the engineered limit of the OEM springs. 1250 and 1500 are above it, so we suggest upgraded valve springs.
Does the tune remove ECU safeties?
No. Other than raising the rev limit by the option you choose, we do not remove ECU safeties or OEM protections.
Do you tune other jet skis or boats?
Email us your model. We also tune Polaris ATVs.
Use and liability notice
Every option needs 93 octane minimum, and we suggest upgraded valve springs for any option above 8000 RPM. N75 Motorsports takes no responsibility for damage where the fuel is wrong, an option above 8000 RPM is run on OEM valve springs against our suggestion, or a pre-existing fault worsens on a tune.