klr650 burning oil?

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Hi.
I changed my engine oil last week,and since doing this im getting blue smoke in the morning when i first start the bike?

Thing is,it never done it before changing the oil.

Problem is i changed it with semi-synthetic car engine oil,although i still used the correct grade 10w40.
I did a bit of reading up on using car oil and the majority of posts said it was fine to do.

Im wondering if i could have caused any long term damage by using it?
Im going to get some proper bike oil today,but im wondering if the damage is allready done,as i cant see how it did'nt smoke before the oil change.

Also if anyone can advise me how much id be looking at to have the engine rebuilt?
I have rebuilt 2 stroke bikes loads of times,and one chinese 4 stroke bike(just top end) which was easy.
I have also rebuilt more car engines than i care to remember,so in comparison the above,how hard would my klr engine be to rebuild?
As far as i can see it does'nt look easy .

I cant even find a manual for it yet so i dont know what the compression should be,but implanning on doing a compression test today at some point.

Appreciate any advice...


(I had it swapped for a really nice looking bike,but i had to pull out because of the oil problem )

[TUG]

The car oil might have mixed crappy with the bike oil and gummed up the oil control ring, drain out eh car oil and keep talking with the bloke with the nice bike to hold the deal.
Change your oil filter of leave it to drain for a good 4 hours or so and keep puttin bike oil in to clear it out.
if all this fails then maybe its time for a piston and ring check.
But try changing the oil first and dont forget to fill it to max prime the filter then refill the oil level.
____________________
Haz ER-5, innit!

[tatters]

dont worry about it all KLR650,s even the new 2008 model burn oil.
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Past:NRG50,AF1125(x2),NSR125RR,ZZR250,CX500,VFR400,KR1S,ZZR600(x2),CB400N,YZF1000(x2),KH125,Z200,FX400R,CBR954RR(x2)GPZ500S,GT550,VFR750F(x2),RD350N,XR650R,CBR600F,CB250,KDX250,YZF750R,CRM250,400EXC,KLR650,TTR600RE,DR350S,R100GSPD,RGV250,VMAX1200,DL650,KZ750 Present:G650XC,C12,CRF450X,1190ADV

[TUG]

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Thanks for the reply's.
I changed the oil filter and left it to drain fully before topping it back up.

Im thinking it could be the piston rings,but then it's only done 22k kms so i thought it was unlikely.Plus the fact that it never lost any oil at all before changing the oil.

As for all klr's burning oil,yeah i heard that from quite a few places,but it never done it before,so it does'nt sound right.

Oh and the engine is a normal single cylinder 650.

I suppose i wont know anything for sure until i do a compression test,but it start's first time every time even after being left for a few days,and it runs perfect with plenty of power so i very much doubt the piston or rings are flucked.

Maybe it is just the fact the klr needs a certain type of oil .
According to the sites i have checked,there is about 5 different grades of oil i can use on this bike too,but maybe worth buying something a bit thicker .

[TUG]

hmmm interesting, well maybe its just that oil? When you sort it let use know what you find.
____________________
Haz ER-5, innit!

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[TUG]

[Cigaro]

You could have overfilled it. Oil can force its way past the rings and into the cylinder, as I found out when overfilling a Land Rover with oil and noticing it was even more smokey than usual.

[TUG]

is this engine a normal wet sump system or do you have to put oil into the frame like the new XT660's and the Aprillia pegaso's? If so its sooo easy to overfill them.
____________________
Haz ER-5, innit!

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Hi,
I definately did'nt overfill it.I allways just add small amount's until it's right.(there's nothing worse than having to drain some back out)

It's a normal wet sump aswell so it's fairly easy to get it right.

I started it up after putting the bike oil in ,and as expected there was still some smoke,but not as bad as it was.
I'll see how it goes over the next couple of days...

Took it for a little run,and it seems smoother? placebo effect maybe? i dont know,time will tell.

[----]

Well.
I give it a few days of normal use to see if the problem would go away.

In the morning when i first start it up,theres next to no smoke.
And the little smoke that is there is nothing really.
I think there may still be some of the car engine oil in there,and once that is completely gone i think the smoke problem will go with it.

I also noticed after putting the car oil in,it developed a small leak from the casing seal near the starter.This has also completely stopped now,so this bike must really not like car oil.

Anyway,it seems all problems are solved,i just thought id update this thread....
Thanks to everyone who commented


P.S
The bike is now on swapz.co.uk it's a fairly cool site that is
So far (since last night when i listed it) i have been offered a yamaha xs850 and a husqervana te610 (but it's not starting for some reason,so i declined that aswell )

I like the idea of a site like that,as id much rather swap the bike for another bike,than sell it ....

Fingers crossed i get some better offers

Thanks
Dave