stuie
New Member
Posts: 1
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Post by stuie on Apr 28, 2016 16:21:52 GMT
Hi guys. Quick question. Can i change the oil seal behind the front sprocket without splitting the engine? 89 model fz750 genesis.
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Post by fz750horse on May 4, 2016 12:22:19 GMT
I was hoping someone else would answer this because I don't really know... The bearing definitely requires a full engine strip because it's keyed into the crankcases and you can't split the cases without doing the top end too, because there are bolts going all the way from the head to the lower case. I have a feeling that there's also a lip on the seal but I'm not sure. Gavin
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pkay
Junior Member
Posts: 71
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Post by pkay on May 10, 2016 3:08:47 GMT
Generally you can but you'll need to pull the sprocket off to be sure. To get the seal out drill a couple of small holes opposite each other and insert self tapping screw. You should be able to pull it out and slide the new one in (lube it up generoulsy to protect the lips). I haven't done an FZ but I have done others this way. And besides it pays to check before worrying about going the long way.
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Post by ian0859 on Sept 26, 2016 20:10:57 GMT
Sadly I pulled the leaking seal on one of my 2MG engines and got a handful of ball bearings(one engine split to be carried out time pending). I put it down to the chain being too tight even though I checked the slack for a 1" play. They get 1 1/2 min now.
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Post by fz750horse on Oct 23, 2016 13:20:44 GMT
They are fragile and I think you're right, an over-tight chain can be the cause. I had one collapse years ago after I had a dealer replace the rear tyre - I didn't check the chain when I rode it away and the bearing failed a week later. These days I always replace the bearing as a matter of course when an engine is stripped.
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Post by grumpypete on Oct 30, 2016 15:39:28 GMT
I have taken the sprocket seal off without stripping the motor. Exactly as described ie drilling 2 tapped holes and pressing it out. Getting a new in was a mare, there is a lip on the seal, in the end I shaved some off the lip off the used a woodwork sash clamp to press it in. From experience with these engines the seal going usually means the bearing is on it's way and the new seal may only stop the leak very short term
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