apltx08
TY 4 Stroke God
250ml in non reverse and reverse, check on your drive belt cover it confirms capacity of oil in for chaincase.
SERPAGS
Expert
21 CAP, HOUSING
8FR-47543-02-00 (replaces 8FR-47543-00-00) 1 $137.80
Since there is a supersede number, I would asume that the speculations that the 07 chaincase is the same as the 06?
How do I know for sure that its the case cover that causes my leaks. Would it not leak al the time? Why twice in 9000 kms?
I just want to be sure thats the problem. Also, would the part number be etched on the cover, just to make sure that I am not replacing the same cover?
8FR-47543-02-00 (replaces 8FR-47543-00-00) 1 $137.80
Since there is a supersede number, I would asume that the speculations that the 07 chaincase is the same as the 06?
How do I know for sure that its the case cover that causes my leaks. Would it not leak al the time? Why twice in 9000 kms?
I just want to be sure thats the problem. Also, would the part number be etched on the cover, just to make sure that I am not replacing the same cover?
87gtNOS
VIP Member
- Joined
- Nov 30, 2005
- Messages
- 1,892
- Reaction score
- 74
- Points
- 1,108
- Location
- Toronto
- Country
- Canada
- Snowmobile
- 12 Apex XTX MCX powered
SERPAGS said:
Look at the picture in my thread...there is clearly a difference, then compare yours.
SERPAGS
Expert
So its just the lip that is smaller? Would it not leak ALL the time if it were the case?
SERPAGS
Expert
REX:
Did you replace the Cover with an 05 cover or the entire asembly?
Would I be able to replace just with 05 cover?
Did you replace the Cover with an 05 cover or the entire asembly?
Would I be able to replace just with 05 cover?
87gtNOS
VIP Member
- Joined
- Nov 30, 2005
- Messages
- 1,892
- Reaction score
- 74
- Points
- 1,108
- Location
- Toronto
- Country
- Canada
- Snowmobile
- 12 Apex XTX MCX powered
It's the lips that are different...see the red arrow in my pic!!!
What happens is there is less surface for the roundy rubber gasket to push against.
What happens is there is less surface for the roundy rubber gasket to push against.
SERPAGS
Expert
87gtNOS said:
Yeah, saw that. Wonder if the first leak I had the dealer assumed the seal, replaced it, and aybe by re-installing, he squeezed the gasket tight enough creatinga good enough seal until now 8000 kms later. Does this even make sense?
87gtNOS
VIP Member
- Joined
- Nov 30, 2005
- Messages
- 1,892
- Reaction score
- 74
- Points
- 1,108
- Location
- Toronto
- Country
- Canada
- Snowmobile
- 12 Apex XTX MCX powered
SERPAGS said:
Yup. Not necessary too tight, but just that hair off and it weeps!
SERPAGS
Expert
hmmmm the stuff we learn. Well I will post back later this week when I open it up?
Any bearing issues (chaicase)?
Any bearing issues (chaicase)?
87gtNOS
VIP Member
- Joined
- Nov 30, 2005
- Messages
- 1,892
- Reaction score
- 74
- Points
- 1,108
- Location
- Toronto
- Country
- Canada
- Snowmobile
- 12 Apex XTX MCX powered
SERPAGS said:
Nope.
BigMac
Expert
- Joined
- Jun 27, 2004
- Messages
- 378
- Reaction score
- 1
- Points
- 591
- Location
- Brainerd Lakes area, Minnesota
I asked my dealer's service manager about this today while I was in picking up a 23-tooth upper gear. He said they have had only one occasion to deal with a leaking chain case on any RX machines. It was out of warranty, but Yamaha picked up the cost of the part (new chain case $142) and the owner paid the labor (about $40). I told him my in-warranty sled's chain case was seeping a little (it isn't) and he said "no problem" bring it in and they'll cover it, replace with the 08 cover. He couldn't find anything in their Yamaha service stuff that mentioned anything about it, said it's likely a "call Yamaha" situation, but he acknowledged that he though that a leaking chain case would be a warranty issue.
He's going to call Yamaha on Monday for clarification on the issue. If they tell him the leaking is a known issue, I'll take it in and have the cover replaced when they do 500-mile-service on my machine, and I'll have them change the upper gear at that time for about $15. If the chain case issue gets a big "????" from his service and/or warranty rep, I'll just change the gear myself and leave the cover alone.
He's going to call Yamaha on Monday for clarification on the issue. If they tell him the leaking is a known issue, I'll take it in and have the cover replaced when they do 500-mile-service on my machine, and I'll have them change the upper gear at that time for about $15. If the chain case issue gets a big "????" from his service and/or warranty rep, I'll just change the gear myself and leave the cover alone.
ReX
TY 4 Stroke God
SERPAGS said:
I replaced the entire assembly with an 05 assembly.
I did check and the 05 cover fits perfectly on the 06/07 case. The only concern I'd have is the somewhat different thermal expansion of aluminum vs magnesium. This probably isn't an issue, but if you want the ultimate cool running assembly I'd change the whole thing to 05.
Thinking about it a little, if I was in your situation I'd simply install the updated magnesium cover (and see if you can convince Yamaha to cover it). As I mentioned above, no-one I know has had any issues (other than running hot and a slight smell) once the updated cover is installed.
ReX
TY 4 Stroke God
SERPAGS said:
I've never personally had any, but the guys I run with have toasted their bearings, chain and gears after running out of oil (due to the leak prone original cover). One guy's chain actually had a few broken link sections, but luckily the chain didn't actually fail completely.
The guys I run with (and myself) are very anal about maintenance. I doubt a normal sledder would notice the low oil until after the chain fails.
ReX
TY 4 Stroke God
87gtNOS said:
I've pulled the cover off several leaking 06/07 chainases. In every case, the gasket has worked its way in at the bottom. What we've noticed (opening up 06/07 cases before they actually are leaking) is that the gasket slowly works its way inwards over many high temperature, high speed runs. The more miles/high speed runs, the farther it has moved in. Eventually it moves in far enough to leak.
I'm fairly confident that if you took the original cover, cleaned it and the gasket with brake cleaner (or similar) and then used a quality RTV gasket sealant between the seal and the cover that it would stay in position and never move. All of the guys I ride with got the updated cover so we never actually tested the RTV method out (but from experience with many, many gaskets; RTV on clean parts really does hold a gasket in place well).
There also seems to be a relationship between oil on the gasket when you install the cover. A couple of times we found after cleaning the gasket and cover well before installing, that the gasket seemed to shift slower than if you simply install it all covered in oil.
Other than the fact that a new seal is also clean we haven't seen any improvement with a new seal vs an old clean seal. The new cover on the other hand works always (even with oil covered seals).
ReX
TY 4 Stroke God
ROCKERDAN said:
Dan and I disagree a little on the fill level...
The guys I ride with and myself fill our case with 250ml of 75w90 synthetic gear oil. This ends up being only slightly above the full reverse line and well below the full std line.
We've also at times filled it to the full STD line (mostly by accident) and have never had any issues with either full STD or 250ml.
My advice is as long as it is filled anywhere between the full Reverse and full STD and there are no leaks you are good to go (assuming your sled has reverse).
I also recommend using a quality synthetic gear oil, but wouldn't be afraid to run dino oil if I was out of synthetic (but I'd change it a little earlier).
