hpmaniac
Veteran
- Joined
- Feb 21, 2025
- Messages
- 26
- Reaction score
- 12
- Points
- 3
- Location
- Washington
- Country
- USA
- Snowmobile
- 2025 mtx sidewinder
2024 9r turbo
2025 summit xpert 165 turbo r
Share feedback and experiences when upgrading from the 270 pm tune to the 300 header pm tune.
Belt and clutching set up mountain and or trail.
I'm running the 270 tune now and still want more, called Dave and decided on 300 header tune. I'm running closed loop. I will also add a adjustable regulator for possible fueling adjustment if needed.
The 270 tune sound happy around 89-9k rpm.
Mine is a mtx so it has stock helix 35 39 and the Dalton black orange spring with stock silver orange silver spring in primary. Belt runs cool, might try a straight 44 and see if I have enough spring for that angle.
Belt and clutching set up mountain and or trail.
I'm running the 270 tune now and still want more, called Dave and decided on 300 header tune. I'm running closed loop. I will also add a adjustable regulator for possible fueling adjustment if needed.
The 270 tune sound happy around 89-9k rpm.
Mine is a mtx so it has stock helix 35 39 and the Dalton black orange spring with stock silver orange silver spring in primary. Belt runs cool, might try a straight 44 and see if I have enough spring for that angle.
