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Smoking problem http://ducatipaso.org/forum/viewtopic.php?f=3&t=7733 |
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Author: | Moses [ Fri Jun 23, 2017 8:53 am ] |
Post subject: | Smoking problem |
Hi everyone, just a question re my 907, it has suddenly started intermittently blowing smoke on start up, sometimes it seemed to choke on oil, other times it starts cleans as a whistle, found a split oil seal and replaced it but no real change, I'm guessing it's seals and guides, perhaps rings as well, just wondered if anyone has had a similar experience, it's done just on 80,000 kms. Cheers |
Author: | JWilliam [ Fri Jun 23, 2017 1:59 pm ] |
Post subject: | Re: Smoking problem |
I think the likely problem is the exhaust valve guide showing wear. When the motor is stopped and cooled down this allows oil to seep past the seal and coat the valve. Hence, smoke on start-up. |
Author: | Mc tool [ Sat Jun 24, 2017 12:43 am ] |
Post subject: | Re: Smoking problem |
Where you hiding ? ![]() ![]() Hamish |
Author: | Moses [ Sat Jun 24, 2017 1:11 am ] |
Post subject: | Re: Smoking problem |
Hi Hamish, I'm in Morrinsville, use Motul semi syn 10w40, bike done 80,000km, where are you. |
Author: | Mc tool [ Sat Jun 24, 2017 1:25 am ] |
Post subject: | Re: Smoking problem |
Thornbury , which is about 30 km's west of Invercargill . Oil sounds ok , the reason I ask is that sometimes when the oil is getting a bit old it can smoke more , and I get the feeling ( no real proof ) that higher quality oils are likely to do this when left in a bit long . I have a friend ( sort of ...... he has a Harley ![]() ![]() |
Author: | Moses [ Sat Jun 24, 2017 1:43 am ] |
Post subject: | Re: Smoking problem |
Hi Hamish, I keep the oil fresh, change it and filters every 5k. Funny thing is that smoking started overnight rather than a slow increase. I also note that the seals rotate easily by hand, is that normal, I thought they would be tighter. Cheers |
Author: | Derek [ Sat Jun 24, 2017 10:13 am ] |
Post subject: | Re: Smoking problem |
No they shouldn't rotate, they should grip the top of the guides quite tightly. It sounds like the seals have become hard and aren't doing their job. |
Author: | Mc tool [ Sun Jun 25, 2017 1:27 am ] |
Post subject: | Re: Smoking problem |
sometimes they ( the seals ) can go up and down with the valve if they aint tight on the guide , and if you have an intake one doing that when cold ........ I once had a XR500re and when I took the baffle thing out ( to make it sound like a mans bike ) it smoked upon start up , took a while for that penny to drop and when I fitted the baffle thing back in ( girls bike again ) it stopped smoking on start .... go figure , coulda had a loose seal .... never looked ![]() ![]() |
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