jsp Posted August 27, 2018 Report Share Posted August 27, 2018 I’ve got a small oil leak coming from the seal around the gear shaft, it’s on the vertigo parts list as a lip seal is this just a standard oil seal ? Quote Link to comment Share on other sites More sharing options...
heffergm Posted August 27, 2018 Report Share Posted August 27, 2018 It's a standard oil seal, and you can replace it, but it'll just leak again almost immediately. All the early ones did. They made a change to later models to alleviate pressure building in the cases, which is believed to be what causes the leak, but I don't know if it worked or not. Quote Link to comment Share on other sites More sharing options...
jsp Posted August 27, 2018 Author Report Share Posted August 27, 2018 Mines never done it before, but I have had an issue with oil coming out of the breather pipe in to the airbox, I’ve now got two breathers fitted one on the kick start side where it should be and one on the sprocket side where they where on the earlier bikes and that’s stopped it coming out the breather Quote Link to comment Share on other sites More sharing options...
tcrhino Posted August 27, 2018 Report Share Posted August 27, 2018 Did you check the primary shaft cover? Sealing area of the cover to crankcase is tiny. Quote Link to comment Share on other sites More sharing options...
jsp Posted August 27, 2018 Author Report Share Posted August 27, 2018 Quote Link to comment Share on other sites More sharing options...
tcrhino Posted August 27, 2018 Report Share Posted August 27, 2018 Yep, that's the shift shaft seal leaking... Quote Link to comment Share on other sites More sharing options...
heffergm Posted August 27, 2018 Report Share Posted August 27, 2018 I'm tellin' ya... I replaced mine twice. Never stopped the leak. Quote Link to comment Share on other sites More sharing options...
jsp Posted August 27, 2018 Author Report Share Posted August 27, 2018 Got to give it a try, it will do my head in leaking all the time Quote Link to comment Share on other sites More sharing options...
jsp Posted August 27, 2018 Author Report Share Posted August 27, 2018 Do these seals just come out with the shaft in place ? Quote Link to comment Share on other sites More sharing options...
section swept Posted August 28, 2018 Report Share Posted August 28, 2018 (edited) It’s poorly designed there appears to be very little of the gear selector shaft (smooth sealing area) protruding for the seal lip to slide against. Can the seal go into the recess further, does the shaft have too much float (in and out play). An alternative would be a sleeve resin bonded to the shaft to allow the seal to work on or a shaft with a longer seal land area. I would even consider working the seal housing so that the seal can actually fit further in by a couple of mm. Not had one of these so I could talking nonsense, however from each idea comes another. It does look as though there is insufficient smooth surface for the seal to work on in my opinion. Edited August 28, 2018 by section swept Quote Link to comment Share on other sites More sharing options...
b40rt Posted August 28, 2018 Report Share Posted August 28, 2018 If it was mine I'd put the seal in the "wrong" way round. Got to be worth a try ? 1 Quote Link to comment Share on other sites More sharing options...
oni nou Posted August 30, 2018 Report Share Posted August 30, 2018 O ring/rings including the seal. Quote Link to comment Share on other sites More sharing options...
b40rt Posted August 30, 2018 Report Share Posted August 30, 2018 1 hour ago, oni nou said: O ring/rings including the seal. Think the o/p is still trying to work out what "wrong " means ...... Quote Link to comment Share on other sites More sharing options...
pauls320 Posted August 31, 2018 Report Share Posted August 31, 2018 Judging by your photo, I would say that that oil seal is the wrong size. The seal has too large of I.D hole for the shaft size, should not have that large of a gap..the outer dust lip of the seal should even be in contact with the shift shaft. Try source a slightly smaller I.D seal, will fix your leak 1 Quote Link to comment Share on other sites More sharing options...
jsp Posted September 4, 2018 Author Report Share Posted September 4, 2018 I've changed the seal for a new SKF one and had run round on it for 20 mins or so and it didnt leak and hasnt since so touch wood the new seal has sorted it Quote Link to comment Share on other sites More sharing options...
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