oil problem help!

[tdog]

I have an 03 rappy 660 jetted, bored, high compression piston but have a small problem. It is running ok but seems to be burning some oil and there is some fuel in the oil tank. What do I do?

[Mad Dog]

start with a compression test, follow up with a leakdown test, and you may end up finding it's time to replace the piston rings.

[Peelz]

  compression test

[Peelz]

Okay so low compression... what's next? Get top end re done?

yeah bummer youll need new piston rings, hopefully not a new piston too ...but have a look at the cylinder and the valves.

this is the point where many people would say:

f**k it, lets build it bigger and better. Higher compression piston, bigger bore etc...

[Peelz]

wont know til you're in there. BUt bad rings is usually the culprit for low compression.

[Mad Dog]

How low was the compression?

[dragonz]

wont know til you're in there. BUt bad rings is usually the culprit for low compression.

& Peelz is an expert on "bad rings"

[Mad Dog]

It was 165psi

I assume then that you disabled the stock decompression mechanism?  About 182 is the expected psi for a disabled decomp, 130 or so if the decomp is left alone.

[tdog]

You think that oil coudve got in the oil from a 2 hour car drive without turning the gas off? Or a bad spark plug? Or even sitting for about 3-4months?

[Mad Dog]

Gas you mean?  You could get gas in the oil if your floats are stuck or your needle valves are bad and your bowl drain tubes are clogged.  After setting for that long you should have changed the oil before you ran it anyway.  I suggest you change the oil, run a few extra quarts through to flush it, and then refill with a new filter.  Run it for a bit and see if the issue returns.  I'd also clean those carbs well after setting that long.

[tdog]

Yeah sorry I did mean gas.  And I am getting new oil filter, spark plug, and changing the oil on Wednesday and will let you know if it returns

[Peelz]

Drain the gas tank too

[tdog]

How do you get the spark plug out?

[Peelz]

like any other spark plug. pull off boot, remove by turning counter clockwise.

need a deep socket.

[Krandall]

they make specific sockets for spark plugs, the inside has a rubber boot so you don't crack the ceramic.