02-10-2009, 08:39 PM #1
Lightened Valve Spring Retainer Question???
Does anyone know the weight of a single stock valve spring retainer compared to an after market (ie: Rotax Racing) "lightened" retainer.
I am curious about the actual difference.
Is it different because of materials or just lightened?
Do the lightened ones hold up okay? Which ones are best?
I heard that the valve collettes sink into some of the aluminum ones.
02-10-2009, 09:43 PM #2
Gord, i don't know the exact weight off hand but the Rotax Racing are the only ones that are aluminum. RR recommends checking/replacing them every 25 hours.
Riva and Seadoo Centre retainers are aluminum vanadius alloy
Last edited by Green Hulk; 02-12-2009 at 09:34 AM.
02-10-2009, 10:08 PM #3
- Join Date
- Apr 2005
stock valve retainers 11 g
rotax racing alu retainers 5.3 g
titanium Retainer 4.2 g
the rotax racing aluminum retainers are "hard-anodize" and general have no issues, but you should check every 25 h like Jerry says.
problems with the RR aluminium retainer also depend on valve/CAM setup.
the are running in the factory engine very well over 9000 RPM for 25h+
the titanium valve retainer are a bit stronger and lighter,
02-10-2009, 10:57 PM #4
Thanks for your input Malte
02-11-2009, 05:48 AM #5
The Seadoo Centre ad was forwarded to me and it says "aluminum vanadius alloy" (is that titanium?) and Riva ad doesn't say much about material.
I'm looking for good as stock reliability over the long haul.
Any more user feedback out there?
02-11-2009, 09:21 AM #6
The Riva kit uses Titanium and comes with upgraded springs and shims that go under the springs. It also comes with the 6 new OE rocker shaft bolts you will need to change when swapping out the valve train components.
02-11-2009, 02:59 PM #7
- Join Date
- May 2005
02-11-2009, 03:11 PM #8
Mark, look at the area under the retainer where they fit against the spring and also look in the pockets where the kotters seat.
02-11-2009, 03:23 PM #9
- Join Date
- Nov 2005
Oh man,check them so soon as possibly,i had a problem with a retainer after 20h from roatax and had 2 broken valve's and a piston !!!It coaste my 1200 euro and fixed myself.
SO CHANGE THEM!!
Maybe some body know's of there is a possibly you can change the ROTAX ratainers in other one's RIVA'S maybe and where i can buy them?
02-11-2009, 03:42 PM #10
Riva valve train upgrade
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