12-22-2009, 09:15 PM #1
Stock or Light Weight Valves for 9K
I'm going through the motor on my RXP-X this winter installing a 3Rude, Motec ECU, Riva valve train upgrade and Riva pistons and rings. I would like to set rev limiter to 9K and was wondering if I needed light weight valves for this or will the stock valves work with Riva valve train upgrade. Any feedback would be helpful !
12-22-2009, 09:21 PM #2
For 9000 RPM's you are definitely going to need the lightweight valves.
12-22-2009, 09:22 PM #3
However, i do know of one instance where JD 1 ran stock weight valves with the Riva valve train upgrade and revved the ski 9000 RPM without issue.
I wouldn't recommend this and I don't think Dan would take this chance again. It's just not worth it.
12-22-2009, 09:48 PM #4
12-22-2009, 09:52 PM #5
I always bring the head to the machine shop to have the valves seated.
12-22-2009, 10:33 PM #6
Seats have to be cut to the new valves.
Anything over 9k needs lightweight valves. Have run 10,500 with lightened valves and Riva springs and retainers with no issue what so ever.
12-23-2009, 06:48 AM #7
my friend do yourself a BIG favor and send Erik/Speedfreek your head & stock valves and have him lighten the stock valves and three angle grind the valve seats to match the valves to the head ....................BINESS!!!!!!!!!!!!!
12-23-2009, 06:52 AM #8
- Join Date
- May 2005
- ocean nj
12-23-2009, 06:53 AM #9
Les Cooke runs lightened stock valves in his engines upto 9200. The Ferrea Valves are good as well but having yours lightened will be cheaper.
12-23-2009, 08:45 AM #10
- Join Date
- Feb 2008
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By outeka in forum Sea Doo Open DiscussionReplies: 6Last Post: 05-05-2008, 10:45 AM
By eclipsecleaning in forum 4-Tec PerformanceReplies: 25Last Post: 09-04-2007, 01:42 PM
By mkersey24 in forum Sea Doo Sport BoatsReplies: 1Last Post: 06-01-2007, 06:15 PM
By Krazy-K in forum 4-Tec PerformanceReplies: 5Last Post: 07-14-2005, 09:49 PM
By tchies in forum Sea Doo Open DiscussionReplies: 0Last Post: 06-27-2005, 07:05 PM