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23 Aug 2007
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That cover is a bearing keeper to stop the mainbearing walking out along the shaft. There is no easy way that I know of to replace the seal other than pulling the cases apart. A service guide is a very good idea.
I'm still not convinced completely that it's a seal problem. What does the plug l;ook like when you pull it out? Is it sooty black, or tar oil black? What grade of plug are you using? I have seen a faulty coil, lead or cap do the same thing. Maybe the carb float is too high? And as someone said, the generation coils at the flywheel may be partially shorting, lowering the spark voltage. An auto electrician should be able to test the spark voltage.
Regards
Nigel in NZ
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27 Aug 2007
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Nigel has got it right.
Hi Travsta. As Nigel has said on the previous reply, you have to split the case. It is a big job for someone with no mechanical experience but if you have played with bikes before, it maybe within your grasp. Get a manual and rule out all other possible causes as Nigel suggested. Also keep an eye out on ebay for another complete bike. It may come in handy for spares and some can be picked up for as little as $200 in resonable condition. Goodluck.
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28 Aug 2007
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Unfortunately i have almost no mechanical experience when it come to bikes. I have worked on plenty of cars but this is the first bike i have owned. Therefore i may have to leave the crank seal to someone who has more experience, assuming that is the problem.
Nigel, the plug looks wet with black oil all over it. Even when i wipe the plug dry and clean it up it still doesn't start unless i replace it with a brand new plug. I have tried two different plugs and it happens on both. I have tried the NGK BP7ES and the BP8ES. Is there any other plug that i could use?
Its confusing cause the bike runs well and kicks over first time when you replace it with a new plug but after a few days of riding it just seems to die out of the blue and then will not start again...
Thanks
Trav
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28 Aug 2007
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You should be able to tell if the oil is coming from the transmission due to main bearing seal wear by keeping a close eye on the transmission oil level. If it is dropping mysteriously then yes it is probably the main bearing seal that needs replacing. Correct me if I'm wrong, but couldn't another posibility be worn rings and or cylinder barrel maybe the oil is leaking past the rings.
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28 Aug 2007
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Forgot to mention you could also try a BP6ES plug in my Spanish manual that came with the bike recommends this plug "if the normal one is wet". The BP7ES is the normal one.
Regards
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7 Sep 2007
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Well ill be going up to the bike next weekend so ill have a bit more of a play around with it and try out some of the stuff that you guys have mentioned. I will try the BP6ES plug as well just to see if that makes any difference. Ill let you know how things turn out.
Thanks engmex
Travis
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26 Sep 2007
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Just replaced crank seals
Just finished fitting engine to my TS185 last night and it's a different bike. The excessive blue smoke is gone and it goes well. I got my crankcase seals from Janet's on ebay (UK) for about $23 delivered. I got a complete gasket set for $19 delivered from a fellow in Brunei. Made good use of the manual whilst pulling down the engine. My crankcase gasket was in perfect condition which only leaves the R/H crank seal as the culprit.
Travsta, my TF185 is a smoker and has been for 18 months. Even though it is smokey, it still runs and starts well. I know its using crankcase oil and the seals are shot. Just thinking that you may have an exciter coil problem because of the above. It depends on how much oil your bike is using. My TF produces a large cloud of smoke when I take off but eases off when I'm at a constant speed. I have a spare stator assy if you would like me to send you one. Just send me a private message with your details. I can also include some tech data on how to do the job.
Last edited by alfy12; 26 Sep 2007 at 07:01.
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