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burning oil

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PHILIP SHAW

burning oil

#1 PostAuthor: PHILIP SHAW » Wed Jul 08, 2009 11:29 am

Hi, slight problem wiht the Z although the bike has had new pistons it seems to be burning oil.how much would it be for the oil seals to the valves be or is it not as easy as that.
thanks
phil

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chrisNI
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#2 PostAuthor: chrisNI » Wed Jul 08, 2009 1:25 pm

Valve stem oil seals themselves aren't that expensive but you need a head gasket, rocker cover gasket etc. and you should check all your cam chain wheels and replace the wee rubbers as well they're probably bakelite. If you're doing the work yourself you're looking at about £80 worth of bits assuming nothing else is shot.

PHILIP SHAW

#3 PostAuthor: PHILIP SHAW » Thu Jul 09, 2009 11:00 am

thanks for that Chris

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bigmac103
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#4 PostAuthor: bigmac103 » Fri Jul 10, 2009 8:19 pm

I have the same problem, just recently got a zed with similar work done and it's burning an excessive amount of oil. So your saying it can only be the valve seals?
Lost in the desert somewhere

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prowlerz1
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#5 PostAuthor: prowlerz1 » Fri Jul 10, 2009 9:53 pm

how many miles since rebuild?
how long ago were the pistons fitted?
was new rings fitted as well ?
what type of oil are you using?
how much oil are you using in say 100 mile?
73 z1 green
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74 z1a brown
75 z1b red
75 z1b blue
76 z900 green
77 z1000 black
Zrx1200r

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bigmac103
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#6 PostAuthor: bigmac103 » Sat Jul 11, 2009 7:01 am

It´s done about a 800 miles within a month. The rebuild is recent about six weeks. The oil was changed twice with semi 10/40. It seems to be using half a litre per 100 miles. The other strange thing it did was to burst the tacho seal and send oil up to the clock spewing oil over the handlebars, tank and me.
Lost in the desert somewhere

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chrisu
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#7 PostAuthor: chrisu » Sat Jul 11, 2009 7:51 am

i would suspect the rebuild. sounds like it is pressurising the crankcases. Have you done a compression test - the rings may not be sealing properly or its been bored loose.

does it smoke at all ?

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bigmac103
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#8 PostAuthor: bigmac103 » Sat Jul 11, 2009 3:41 pm

Yes it does smoke a little. I did do a compression test i got 135, 122, 135,135.
Lost in the desert somewhere

DAVE LEWIS

#9 PostAuthor: DAVE LEWIS » Sat Jul 11, 2009 4:09 pm

Silly question but i have to ask did it have a re-bore?

Dave L

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bigmac103
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#10 PostAuthor: bigmac103 » Sat Jul 11, 2009 7:53 pm

i don't think so!
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kev edwards
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#11 PostAuthor: kev edwards » Sat Jul 11, 2009 9:04 pm

It might pay to check the crankcase breather , had a blocked one on an old tincorna once and it drank oil as if it was out of fashion .

DAVE LEWIS

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#12 PostAuthor: DAVE LEWIS » Sun Jul 12, 2009 5:25 pm

Umm is there 2 threads going here?

Dave L


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