Thread: RXP-X Rotax Racing ECU
02-19-2008, 09:19 PM #1
RXP-X Rotax Racing ECU
Has anyone tried one of these yet ?
I want to run one with a Les Cooke C-Kit, 60mm Throttle body, 50lbs injectors and valve train upgrade. Ideas?
02-19-2008, 09:26 PM #2
- Join Date
- Nov 2007
- Odessa, TX
02-19-2008, 09:28 PM #3
I dont think it will work with 50lb injectors. Yop would be better to use the Riva ECU and RRFPR.
02-19-2008, 10:09 PM #4
02-19-2008, 10:17 PM #5
02-20-2008, 12:05 AM #6
02-20-2008, 07:26 AM #7
02-20-2008, 09:57 AM #8
02-20-2008, 10:01 AM #9
im somewhat at a loss as to why u need the LIGHTENED VALVES and the ROCKER SHAFT work if people are already reving these engines to 9000+ RPM with various ems systems......WITHOUT doing this work...........u say now because this Rotax ECU revs to 8800 rpm this work is needed and it kinda makes me wonder .......WHY? thanks in advance for the information! appreciated!!!!!! BET!
02-20-2008, 10:04 AM #10
with the new Rotax Racing ECU for X models with 8800 rev limit you must use the Rotax Racing 60 lb hr injectors.
If you use the Rotax Racing spring retainers and shims you must also have the valves lightened. The Riva valvetrain upgrade kit has been run to 8800 rpm's and more with the stock valves with no problems. The higher rate springs make a difference.
06 and up skis do not have an oil pressure jet for the head like the 03-05 blocks so on 06 and up you have to drill the orifice larger in the rocker shaft to get more oil to the head.
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