Oil Starvation in Wheelies?

Visitor Q · $25 whore Joined: 30 Apr 2004 Karma :

Now i know very little about how the oiling system works in 4 strokes (and anyone who doesnt realise how 2 stroke lubing works obviously hasnt owned one... 15 quid every 4 tanks Crying or Very sad

)

Anyway ive seen and heard multiple stories of (admittedly only 4 strokes) bikes seizing up from oil starvation by too much time saving front tyre wear.

Is there anyway to avoid this, asides from the obvious keeping the oil clean and topped up (oh that and less/no wheelies)

I didnt think my bike was one of the main ones at risks, more the v-twins and old school in line 4's, but ive heard a couple on cbr 600's and thats whats worrying me now.

Any advice or anecdotes?
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mchaggis · World Chat Champion Joined: 09 May 2004 Karma :

The best way to avoid oil starvation? Get a bike which doesn't suffer from it (no way of telling which one that might be - maybe the dry sump bikes) or modify your sump and oil pickup to run when wheelied, as some of the 'pro' stunters do. A two stroke can't sieze from being wheelied.

Just don't do prolonged wheelies I think is the best answer.
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Adam_P · World Chat Champion Joined: 23 Jan 2004 Karma :

I suppose it will depend on how high you have the front wheel and how hard you're revving it. If its starving of oil the harder you rev the more damage you'll do.
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G · The Voice of Reason Joined: 02 Feb 2002 Karma :

I believe you can get foam to go into your sump to stop the oil sloshing about so much. www.stuntlife.com would be the place to ask about such things.

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

Twins tend to be worse as they have a large change in crankcase volume as the engine runs.

Oil pick ups nearer the back will help.

Problem is that a 4 stroke engine relies on a high pressure oil supply, so needs the oil pickup to be submerged.

You can try baffling the oil sump a bit, but might cause more problems.

All the best

Keith
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mr.z · World Chat Champion Joined: 04 Feb 2004 Karma :

I know pro stunters modify their engine + oil delivery to take sustained wheelies...

Depends entirely on the engine as to weather it will or not, some will go bang very quickly, some will cope quite happyly with it... some bike engines will get fluid locked when dropped and ran on their side!

It would be a matter of haveing fairly intimate knowlage of the specific engine, perhaps asking on a stunting type board about how suitable your bike is...

Personally wouldnt wheelie on any bike that was my only bike/main transport.. knackers clutchs, cables, headstock bearings, all sorts of bits are put under stress and are going to fail early.. still would like a bike to play on + money to run one "just for fun"
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Sparks! · Sir Tart-a-lot Joined: 30 Aug 2003 Karma :

Bonny you need to wheely quite a long way at balance point or so... to starve a cbr600.
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Visitor Q · $25 whore Joined: 30 Apr 2004 Karma :

Sparks! · Sir Tart-a-lot Joined: 30 Aug 2003 Karma :

12'd and flipped are different things Laughing

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Visitor Q · $25 whore Joined: 30 Apr 2004 Karma :

Sparks! · Sir Tart-a-lot Joined: 30 Aug 2003 Karma :

So.. when are we going to get some pics and vids?? Twisted Evil

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Visitor Q · $25 whore Joined: 30 Apr 2004 Karma :

Claud 14.7 to 1 · World Chat Champion Joined: 06 May 2004 Karma :

Yeaaa Herts video! Laughing

Soon, a feature length video Laughing

Visitor Q · $25 whore Joined: 30 Apr 2004 Karma :

Claud 14.7 to 1 · World Chat Champion Joined: 06 May 2004 Karma :

Sure mate. Whenever.

I gotta fix my clutch though. Bah, we'll be out most weekends I should hope. Mr. Green

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

My mate blew the engine on his SV650 through top-end oil starvation due to pure acceleration. No wheelies involved, simple acceleration G causing all the oil to run to the back of the sump. He had to have baffle plates fitted inside the sump to prevent this happening again.

He did come first in his class in the straightliners drag championship on that bike though. It was pretty much a standard bike for all that, just an end can and a dyno setup by way of tuning.
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