SDuster11 Posted June 1, 2006 Report Posted June 1, 2006 Just got my shee and I have ironed out most of the bugs. But I still have ALOT of smoke on the right side exhaust. So according to what I have read it's the Crank Case Seal. Now I would like to replace it but am having trouble figuring out exactly what all I have to do in order to do it. As a side note my Clymers hasn't come in yet so I'm not that big of a tite ass. This is currently my train of though: Pull off the clutch cover and the crank case seal is just on the right side (as your looking at it or on the crankshaft). Can I simply pull the crank gear and or maybe the clutch and then change out the crank case sea? Thanks and set me straight. Quote
KlotzBanshee Posted June 1, 2006 Report Posted June 1, 2006 I wish it was that easy. I hear you have to slit the case to do the crank seals. Quote
ssanddemon Posted June 2, 2006 Report Posted June 2, 2006 The seal has a raised ridge running all around the outside which mates in a groove in the top and bottom halves of the cases- makes em 'lock in' so crankcase pressure doesn't let them spit out. I have replaced em by drilling a small hole thru the seal, paralell to the crank. Then run a sheet metal screw into each hole and tighten alternately. The screws will bottom off the crank bearings and as you tighten them, the seal will be drawn out. Slime up the new seal with Locktite 515 (which will semi-harden and help lock the seal in properly even if the ridge gets a little dinged up when driving in) and it will drive in with a hammer and seal driver. It's kinda a pain, but way better than splitting cases. As a side note, if the evil gods are against you, you could mess up a bearing cage so beware; which would mean splitting cases to replace the bearing. So to me it is always worth a try and so far the three I have done have all been OK. Quote
IRONDOG Posted June 2, 2006 Report Posted June 2, 2006 OK, here is the answer to the dreaded "split the case to change the seal" problem. Go to your Yamaha dealer and pick up seal number 93103-40058, you may have to order it but it has been used on many Yamaha dirt bikes since the early seventies so they may have it in stock. It is identical to the factory Banshee R.H. crank seal except it does not have the molded in retaining ring on the o.d. Remove the old seal by drilling the holes as previously stated or just pry out the seal- it's in there tight but you can get it out. The new seal installs with the stand-off nubbies towards the bearing, just like the seal you just removed. You can install it dry or if you are worried about it pushing out put a thin layer of Yamabond 4 on the o.d. of the seal, this will assist in installation and will retain the seal very well when dry. (ThreeBond 1104 is the same as Yamabond 4 and is available from any decent bike shop) Be sure to put some light grease such as lithium on the inner seal lips to ease break-in of the seal on start-up. I use a slurry of moly grease and two cycle oil on the lips but not everyone has the correct moly. Oh, and I recommend always using factory OEM seals, not the cheap "seal kits" that are purveyed over the internet. Nothing is better than a factory seal and they aren't that expensive. Feel free to email or PM me if you have any further questions on this procedure. Jerry Quote
SDuster11 Posted June 3, 2006 Author Report Posted June 3, 2006 Okay that helps out but what all do I have to take off to get to the seal? Does the clutch have to come off? And am I thinking of the right seal as I described in my previous post? And also exactly what all will I need to purchase before I start this? Thanks and any help would be great. The sooner I can do this the happier I'd be b\c my buddies are having a heck of a time riding with me b\c i'm smoking them out. Also about how long (roughly) would this take? thanks, Dustin Quote
racer Posted June 3, 2006 Report Posted June 3, 2006 you may need to remove the clutch basket. should take 1.5 - 2 hours. and the parts are the one described, yamabond 4, a new clutch cover gasket, some new oil, and some new antifreeze. Quote
lonestar Posted June 4, 2006 Report Posted June 4, 2006 Sometimes on higher out put motors it's not the seal itself it's the keyway sometimes it leaks through the key-way. First remove nut and washer push key in all the way till it bottoms out. Then degrease. Then squirt silicone in the keyway then behined washer and on the threads also. Seal it up. Then torque the nut. Try that first. It happen to me and it worked. Jimmy at trinity told me this he was wright. He says they get alot of motors in saying the seal has gone bad when it wasn't the seal itself. It was the key-way. I'm not saying this your problem but check this first. Good luck Quote
SDuster11 Posted June 7, 2006 Author Report Posted June 7, 2006 Okay I pulled the seal out today without to much trouble. It looked pretty good but there was some Aluminium shavings in the clutch cover area. I believe they were coming from the tranny shifting mechanism. But I don't know what to call the piece it was coming from. I will try to get some pics of it tomorrow. I callled the local Yamaha shop and asked if they had that seal listed here on this thread above and they said that one was discontinued. And the banshee crankcase seal was going to take a week to get here. I'll do that unless there is a quicker way to get one. Any ideas? thanks Quote
SDuster11 Posted June 10, 2006 Author Report Posted June 10, 2006 I know this isn't a very clear pic. Sorry But here's the rundown: When I pulled the seal there were aluminium (i think it was Aluminium) shavings in the seal on the clutch basket side not the motor side. And everything looks fine when pulling off the cover (to expose the clutch) except the part I circled in red in the following pic. That appears to be creating the metal shavings. Can anyone help me out and tell me what this part is or how it is doing this. thanks Quote
SDuster11 Posted June 18, 2006 Author Report Posted June 18, 2006 I replaced the seal and put everything back together. Had some "issues" with the clutch but I'll get to that. Started it up and it was still smoking out the right side exhaust. Just about as bad as it was previously. So I went ahead and ran it and from what other people were saying it stopped smoking nearly as much. I am still running my old silencer packing with was pretty well soaked in oil. New packing coming soon but could it be just blowing out oil from the packing now? Or could it still be from the seal or something else? I believe there is a way to check if the seal is sealing off or not but how do u do it? Clutch "Issue": The clutch boss was ruined because where the springs screw in sheared off and damaged a few things. I found a used clutch boss on ebay for cheap and plan on getting that but should I look at getting anything special for the clutch while I have it apart? I plan on getting reeds soon and the bike already has pipes, cool head, jet's, needles, K&N Clamp on Kit. and I don't want to worry about a slipping clutch with a lil more power. I found some clutch springs on ebay and would these be good? thanks and sorry for the long post http://cgi.ebay.com/ebaymotors/Barnett-Clu...1QQcmdZViewItem http://cgi.ebay.com/ebaymotors/01-Yamaha-B...1QQcmdZViewItem Quote
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