Qcriders
Newbie
- Joined
- Apr 5, 2026
- Messages
- 3
- Reaction score
- 0
- Points
- 1
- Location
- Québec
- Country
- Canada
- Snowmobile
- Yamaha sidewinder srx 2019
Yamaha srx440 1980
2x Yamaha enticer 300 1980
Hi everyone.
My srx has no top end whatsoever.
Here’s the setup I’m running:
Tune: stage 3 multimap pefi (with the 2.5inch pefi exhaust)
Clutching;
Primary:
green dalton spring
Dalton dtay1 ramps set to 75.5g
Secondary:
Dalton orange spring
41/37 helix
Preload set to 1-6
Track: 2 inch lugs no studs.
My problem:
Instead of reaching 9000rpm like the tune says I should, i only reach 7800rpm - 110kmh.
When I’m wide open, the knock light appears once I reach my plateau and disappears when I let off the throttle. (I run 91 octane with octane booster and still didn’t fix)
I need help.
My srx has no top end whatsoever.
Here’s the setup I’m running:
Tune: stage 3 multimap pefi (with the 2.5inch pefi exhaust)
Clutching;
Primary:
green dalton spring
Dalton dtay1 ramps set to 75.5g
Secondary:
Dalton orange spring
41/37 helix
Preload set to 1-6
Track: 2 inch lugs no studs.
My problem:
Instead of reaching 9000rpm like the tune says I should, i only reach 7800rpm - 110kmh.
When I’m wide open, the knock light appears once I reach my plateau and disappears when I let off the throttle. (I run 91 octane with octane booster and still didn’t fix)
I need help.
74Nitro
VIP Member
- Joined
- Feb 18, 2013
- Messages
- 5,707
- Reaction score
- 4,306
- Points
- 1,853
- Location
- Dublin Ontario
- Country
- Canada
- Snowmobile
- 2019 Sidewinder LTX
Any intake mods? What's the fuel pressure?
See n blue
Expert
- Joined
- Dec 10, 2013
- Messages
- 246
- Reaction score
- 125
- Points
- 783
- Location
- East
- Country
- Canada
- Snowmobile
- 2017 LTX
You should monitor boost. I’d be suspicious on a leak. Stock BOV?
Qcriders
Newbie
- Joined
- Apr 5, 2026
- Messages
- 3
- Reaction score
- 0
- Points
- 1
- Location
- Québec
- Country
- Canada
- Snowmobile
- Yamaha sidewinder srx 2019
Yamaha srx440 1980
2x Yamaha enticer 300 1980
I haven’t done any test related to the fuel pressure. No intake modAny intake mods? What's the fuel pressure?
Qcriders
Newbie
- Joined
- Apr 5, 2026
- Messages
- 3
- Reaction score
- 0
- Points
- 1
- Location
- Québec
- Country
- Canada
- Snowmobile
- Yamaha sidewinder srx 2019
Yamaha srx440 1980
2x Yamaha enticer 300 1980
No boost leak all the test related to that have been performed. In a pull I’m building 20psiYou should monitor boost. I’d be suspicious on a leak. Stock BOV?
Stock bov
Similar threads
- Replies
- 7
- Views
- 3K
- Replies
- 7
- Views
- 1K