Need some advice on cleaning exhaust valves - Snowmobile Forum: Your #1 Snowmobile Forum

vMaxxKid · 01-22-2008, 05:57 PM

Hey guys, i need some help on cleaning out my exhaust valves. My sled is a 98 Formula 3 700 triple. ive never taken them apart before but im pretty sure then need to be cleaned out. How should i do this? Any advice would be great, thanks. oh and any links to a site which shows or explains how to would be awesome.

RedRider_AK · 01-22-2008, 06:43 PM

Take your RAVE covers off, they simply snap off I believe. Pull out the slide and then soak it in oven cleaner liquid, but don't leave it on there too long because it's corrosive. Wear rubber gloves and scrub with a Scotch-Brite until they're clean.

polaris punk · 01-22-2008, 09:38 PM

I have 2 Rev's and the RAVE covers come off with 2 bolts(hex head). i think your sled should be the same. Either way be careful not to drop/lose the spring that sits between the rave valve and the cover.Take out the valve carefully making sure not to damage the gasket. I then use spray on carb cleaner to clean the oil deposits and wipe them clean with a clean rag.Have a look down the bore and clean as much of the gunk out as you can with a rag.Put a light coat of oil on the valves and replace. The valve should say "top" on it so you put it back in the same way. Oh yeah...do one at a time.

widetrack man · 01-28-2008, 09:59 PM

Looking for a little advice as well , is this cleaning process the same for a 2002 Skandic Widetrack 600 LC. Also , does the RAVE have any effect on fuel consumptin . WideTrack man .

polaris punk · 01-29-2008, 10:00 AM

The process is pretty much the same on any rotax with RAVE. The RAVE valves will effect fuel economy because one that is not working properly will hamper overall engine performance. I had an '03 Rev 600HO and the one valve was so gummed up it was stuck wide open. It made for poor performance and terrible fuel milage.

bmwmxz · 01-29-2008, 07:08 PM

hey i had a 99 formula 3 and u just move that metal piece over it is attached over the black rubber piece on the rave and it comes right off and the spring is lose so catch . then use cleaner to clean that part up and the inside or w.e it would be easiest to takethe pipes off firts so you can get in there easier