RacerDave
Expert
Another forum I'm on, it's been brought up the 06 Apex chaincase was not vented. Which led to some overheated cases and puked oil, bearing problems etc. How about the 07. Is it vented? RR
ROCKERDAN
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you were misinformed....this site has the best info here on TY....
there was a change on the 07 chaincase covers.....it has a slightly larger LIP around bottom inside gear,in which the rubber gasket can SEAT better...with more surface area to help the slight seaping some saw.
I know cause I got the new 07 cover under warrantee,and compared the new to old.
the VENT issue was something SOME thought was the problem....the VENT is in the DIPSTICK,and has NOTHING to do with the cover.
some dipstick rubbers at top where vent is,were not opened very well....so we simply cut them open more with an exacto knife....but most didnt need to do this.
IMO there were two big problems....first,the factory lube is not synthetic....and secondly,the lube was only filled to reverse line,which IMO is NOT enough oil.....and i believe on hi speed runs it would overheat and cause the seepage afterwards from heat on gasket.
either way,if you have seepage,get the new cover under warrantee and install synth lube filled to standard line...done!
Dan
there was a change on the 07 chaincase covers.....it has a slightly larger LIP around bottom inside gear,in which the rubber gasket can SEAT better...with more surface area to help the slight seaping some saw.
I know cause I got the new 07 cover under warrantee,and compared the new to old.
the VENT issue was something SOME thought was the problem....the VENT is in the DIPSTICK,and has NOTHING to do with the cover.
some dipstick rubbers at top where vent is,were not opened very well....so we simply cut them open more with an exacto knife....but most didnt need to do this.
IMO there were two big problems....first,the factory lube is not synthetic....and secondly,the lube was only filled to reverse line,which IMO is NOT enough oil.....and i believe on hi speed runs it would overheat and cause the seepage afterwards from heat on gasket.
either way,if you have seepage,get the new cover under warrantee and install synth lube filled to standard line...done!
Dan
stinx
Expert
All I can say is my 06 is sitting at the dealer waiting for parts. My sled has 3700 miles,has the updated 07 chaincase cover and gasket,done last year. My sled is leaking oil out of the chain case due to what looks like a gasket failure.My chaincase was filled to the proper level with synthetic oil. Leak devolped after a day of riding, mostly high speed riding with the last few miles of the day wide open to the bar. Im bummed because I was supposed to be leaving tonight for a trip, but my parts have not come in yet,they were ordered last Thursday WTF!!! OH well not much I can do except wait it out.
berge75
Expert
From what I seen with mine last year,the gasket (skirt)needs to be pinched by the cover around the outside of the chain case to keep the seal from moving around. If it is not, the gasket lip that seal the case to the top of the cover,is allowed to bend over and creates a small gap between the cover and the top of the case,and slowly leaks out the oil. I used a small center punch,and peened the bottom half of the CASE around the outside where the seal sits, to give the seal some traction, and to narrow up some of the clearence. 4000mi. no more issues since.
ROCKERDAN
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berge75 said:
sounds like a good idea.....i know the issue seems to happen always when guys run hi speeds for extended time...must have something to do with heating up and allowing the gasket to seap .
I know some have used RTV sealant on bottom part of gasket with success too....mine has been good with 07 cover and new gasket after 3000+miles now.
But I run REDLINE shockproof lightweight chain oil and keep it filled to stand line.
Dan
Is the -07 chain case in magnesium ???
I have a 2007 rx1 attak (Warrior in Sweden) and my chaine case is in magnesium!
I have a 2007 rx1 attak (Warrior in Sweden) and my chaine case is in magnesium!
marq
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ROCKERDAN said:
I just had my chaincase replaced due to failure - same problem with gasket combined with high speed runs. While waiting for parts to come from Yamaha, I found some interesting data:
On Yamaha's website if you look up the 06 OR 07 Apex chain case cover parts numbers it shows the same number (8FR-47543-00-00). Yamaha's parts finder also does NOT show an updated part number.
I went over to Port Yamaha's website and used their part finder and it shows a different result for 06 and 07 chaincase covers. It shows part number 8FR-47543-02-00 REPLACES part number 8FR-47543-00-00. This would seem to indicate the part number for the "chaincase update".
If you go to either Port or Yamaha's parts finder and look up the 08 Apex, the part number is 8FR-47543-10-00 with no replacement number.
When my warranty parts arrived, the cover that I received matches the 08 part number.
marq said:
Did your Chainecase cover has a "magnesium" text print on the cover??
rxwhopper
TY 4 Stroke Guru
being that i had my cover apart i asked my dealer to. he looked up part numbers on 06 to 07 also and they were the same. all he said it isnt true and this site is a big pain in the but for him. lol
marq
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mrplasma said:
Yes it did.
ROCKERDAN
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yes still has magnesium on it....and I posted pics here 2 yrs ago i think...when i changed mine,showing the difference in the LIP or ledge on bottom inside....definitley different.
maybe the 08 cover has another update???...i would hope so cause ive heard of guys still seeping even with 07s!
Dan
maybe the 08 cover has another update???...i would hope so cause ive heard of guys still seeping even with 07s!
Dan
berge75
Expert
ROCKERDAN is correct,I recieved the updated cover,and the inner sealing surface tapered on the bottom half leaving half of the sealing surface open to the oil. The new cover had the same sealing surface all the way around. This new cover definitely help the situation,but still there where some failures with the new ones. Yamaha should make the covers with a U groove for the seal sit in, so the seal wouldn't be allowed to bend over under the cover.
ReX
TY 4 Stroke God
ROCKERDAN said:
A few clarifications (IMO):
The cover used on virtually all of the 07 Yamahas is the same as the 06 cover. Both 06 and 07 Apex/Attaks are prone to having shifted chaincase gaskets and chaincase oil leaks (potentially leading to chain/chaincase failures). For the 07 season Yamaha made available an updated cover (that was "known" as an "07 updated cover", but was not included on 07 sleds) that improved the seal securing abilities and essentially fixed the oil leak issue. This updated cover was supposed to be installed whenever an 06/07 Apex/Attak suffered a chaincase oil leak and was in for warranty service (not all dealers read the bulletin though, so sometimes the cover was not updated).
Although I can't confirm this first hand, my understanding is some time very late in the 07 sled build, Yamaha started to use the updated cover (after all of the original "leak prone" covers were used up). Every 07 I'm aware of, including mine, came with the same cover as the 06 sleds.
I concurr on the venting information above. No one I know had any issues with the vent.
I don't agree with the oil statements above. From the factory every Apex I've seen came with the oil filled to the "std" full line. This means that all reverse sleds were overfilled from the factory, not underfilled as stated above. This and the type of oil used by Yamaha have nothing to do with the oil leaks and chain failures. Once the cover is updated, as long as the oil is filled somewhere between the reverse full line and std full line, there have been no reported chaincase leaks nor premature chaincase failures.
Although there is a discrepancy on what the correct oil level should be, filling the chaincase to the "reverse full" line on a sled with reverse is exactly what the Yamaha owners manual tells you to do. Running this oil level and/or using a high quality non-synthetic oil will not cause a chain failure. It is oil leaks that cause the failure.
For the best protection and life span for your chain use the updated cover, change the oil regularly (more often is always better), use a measured 250ml to fill (which brings you slightly over the "reverse full" line), and use a high quality 75w90 synthetic oil. If you or your dealer happen to have used a high quality non-synthetic oil and/or filled it to the "revers full" line, don't worry about it. As long as the updated cover is installed you shouldn't have oil leak issues (without the updated cover I'd recommend checking the oil level regularly; personally I'd get the updated cover one way or another, even if I had to pay for it).
ROCKRTX
TY 4 Stroke Junkie
I got the original cover on my sled and it never leak,lot of WOT.
marq
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ROCKRTX said:
A lot less headaches for you then. For about $120 USD you might want to consider it for peace of mind. Or you could just leave it as is.
Mine blew while running railroad grades where I was running about 100-110 mph and stopping for stop signs, then back on gas. I had 2400 miles at the time.
My uncle blew the case on his 06 Apex about a week later, while running a different trail system where top speed was probably 60-70 mph. His sled had about 5000 miles on it.
My point is that people can have this problem regardless of miles on the sled and regardless of the speed run at the time of the failure. If you choose not to replace the cover on your own, I suggest you check for leakage and proper fill level often. It only takes a second to peel off the side panel.
