Top end death rattle **Added video**

[_Iain_]

Very noticeable.

Bikes using a lot of oil too. I.e i did a change last week and its now at the min mark. Had less than two tanks of petrol in it.

Suggestions?

Apologies for putting my finger over the mike about 7 secs in, it comes back off at 15sec. As you can see, no blue smoke when it's blipped & valve's usually smoke blue like a bastard when they go from what i've seen.

https://i1148.photobucket.com/albums/o574/_Iain_/th_AE3EF01D-BDD7-4F85-811C-806211528B78-11049-000010AE160F7693.jpg
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Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

[karthead]

Someone is sure to fill you in more about the rattle...
For the oil, if you are sure there aren't any leaks, then its probably burning up the oil, and that seems like a lot of oil to burn up in a week or so. Could be bad rings, dont know what to think, but if this is the case, the rings would usually slowly ware, rather than suddenly allow nugget loads of oil to flow past.
I'd say its a good idea to take off the valve cover for a decent look. Could be a bad valve stem seal also?

Is it 4 or 2 stroke?
It could be a cam chain tensioner also.
Take a couple pics when/if you get that valve cover off. Good luck!

[_Iain_]

[karthead]

[P.addy]

Safety pin distributor cap boy can't tell if its 2 or 4 stroke yet mentions a chain tensioner.

Go eat needles.

Iain, it sounds fine

[karthead]

[P.addy]

[mysterious_rider]

sounds ok to me.

[nowhere.elysium]

It's an air-cooled twin. They're noisy by their very nature.
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'10 SV650SF, '83 GS650GT (it lives!), Questionable DIY dash project, 3D Printer project, Lasercutter project

[karthead]

[nowhere.elysium]

[_Iain_]

Its now progressed. Light puffs of smoke if you rev it hard after a long run. Feels down on power. Hesitates. But then it was raining hard.

Im 90% sure its just a combination of weird symptoms making things look worse than they are. Either that or paranoia after running out of oil the other day.

Paddy - any chance i can pop down and get the dremel? Need to put the side cover on the engine propperly as water in there isnt going to help!
____________________
Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

[nowhere.elysium]

What colour is the smoke, and have you run a compression test on it yet? I have a compression tester that you're welcome to use, should you need it.
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'10 SV650SF, '83 GS650GT (it lives!), Questionable DIY dash project, 3D Printer project, Lasercutter project

[P.addy]

[ThoughtContro...]

[karthead]

[nowhere.elysium]

[karthead]

[Jim Mc]

Don't 2 strokers have a chain tensioner, to drive an oil pump? Or do they just rely on the gearbox to circulate the oil?

[russell210276]

2 strokes dont have cam chains, rockers or anything like that they get there oil from mixing petrol and 2 stroke oil via premix or oil pump a 4 stroke has oil in the sump and the bearings sit in that oil where as a 2 stroke does have a sump but its only for the gears and clutch someone can elaborate a bit more but im sure u get the idea

theres nothing mechanical in a 2 stroke except the piston and conrod thats why there so light.

and the oil pump on my rg is connected to the side of the engine on a gear so the faster i go the more oil flows and vise versa

[nowhere.elysium]

[Matt-]

Sound's fine

[DrDonnyBrago]

I think the safety pin gudgeon pin circlip has failed.

Time to hammer out a new one from a coke can and plasticine .

[karthead]

[Timmeh]