Questions you're too embarrassed to ask

**TOTO** · 6th January 2008, 22:32

Another Question:

My mate just bought a GSX250 and is happy to ride around with no licence at all - not even learner. I told him he will get fined but he is not too worried. Does anyone know what the fine is for driving a vehicle without a licence and are there any other penalties on his current full car licence? would they take his bike off ?

**Madness** · 6th January 2008, 22:39

Originally Posted by TOTO

Another Question:

My mate just bought a GSX250 and is happy to ride around with no licence at all - not even learner. I told him he will get fined but he is not too worried. Does anyone know what the fine is for driving a vehicle without a licence and are there any other penalties on his current full car licence? would they take his bike off ?

Wrong class of licence = $500 & 25 demerit points (from memory). Wish him luck from me.

**Drum** · 9th January 2008, 21:39

And tell your mate, no license = no insurance. How long would it take him to pay off a crash into the side panel of a Porsche?

**boomer** · 9th January 2008, 22:06

Originally Posted by TOTO

Here are my latest questions:

1.
When people go to the track and race their normally road bikes they put some kind of black tape on the lights and the screeen. whats this stuff for? Seen in magazines and pics on KB? Can anyone answer ?

All to assist in aerodynamics. Black makes the bike look better and we all know black bikes go faster. The chicky above who answered was spot on. S people dont run over glass and people dont have to sweep it up in little pieces.

2.
when you are riding at night and on the road there is a possum what do you do? Toningt I had my first country night ride and nearly got a bin 3 times in a distance of 8km because of the bloody possums. lucky I was riding with 60 so I could swerve but at a 100 what showld I do ?

Do a bunny hop over the top of it.

LOOK where you want to go and go around it.

thanks

TOTO

10110011101

**TOTO** · 9th January 2008, 22:36

Originally Posted by Drum

And tell your mate, no license = no insurance. How long would it take him to pay off a crash into the side panel of a Porsche?

naaa , he likes to be illegal. Ive been tellling him for a week already but he is like : yea yea , some day... not clever I know. sooner or later he will meet Mr.

**TOTO** · 10th January 2008, 23:20

Another newbie question i'm embarassed to ask:

If I want to put a screeming demon on my bike I read that "rejeting" is recommended.

Can you tell me what rejeting IS?

And where is the best place to do it ?

**disenfranchised** · 13th January 2008, 07:50

Originally Posted by TOTO

Another newbie question i'm embarassed to ask:

If I want to put a screeming demon on my bike I read that "rejeting" is recommended.

Can you tell me what rejeting IS?

And where is the best place to do it ?

Nah, just the pipe change alone doesn't need rejetting..although making the bike run a bit richer will improve things slightly.
Your friendly neighbourhood bike mechanic should be able to adjust the jet positions to make it run richer after you put one on...and you can just wait until the next scheduled service to get it done.

Can't tell you exactly what rejetting is...
It's something to do with the jets in the carbs..probably replacing them to ones with a different flow/output or something

**The Pastor** · 13th January 2008, 08:01

re jetting is replacing the jets / needles in your carbs.

Its not a hard process, but can take a long time, a dyno helps out heaps but its expensive.

**breakaway** · 13th January 2008, 14:09

How long do you have once the Oil Pressure light comes on till your engine seizes?

**Ixion** · 13th January 2008, 19:40

If it is an oil pressure light and not an oil level light, your big ends went out to lunch about 5 seconds ago.Maybe another minute at pace before it seizes or snaps a rod.

**ital916** · 13th January 2008, 20:01

Jeez amit your bikes a mess dude haha buy a new one...a 250cc one that you can go just as quick on.

**breakaway** · 13th January 2008, 20:47

Originally Posted by Ixion

If it is an oil pressure light and not an oil level light, your big ends went out to lunch about 5 seconds ago.Maybe another minute at pace before it seizes or snaps a rod.

So if you kill it straight away then there is not much damage? Sorry I don't understand what you mean by "big ends going to lunch"

What is the oil pressure light for anyway? Where is the oil being pumped to? By "big end" do you mean crank?

Originally Posted by Drider87

Jeez amit your bikes a mess dude haha buy a new one...a 250cc one that you can go just as quick on.

My oil light didn't come on, I'm just asking out of curiosity. Besides, the mechanical bits are fine, and I couldn't give two shits about the cosmetics right now. And I'm not going to buy another shitter 4 pot from 1987 which has been raped to within an inch of its life every day ever again, if I buy it will be a new, or at least with service history.

**riffer** · 13th January 2008, 20:56

Big Ends are the bearings that go inside the conrod (the rod that goes between the crankshaft and the piston). This needs to have constant lubrication because in most bikes it consists of a couple of thin slivers of metal that rely on sucking up oil inbetween the two sides to work properly. The Big End (so-called because its the bigger of both ends) is the end that connects to the crankshaft. Yes - the little end connects to the piston.

If you don't have enough oil pressure, you will loose this protective layer of oil inbetween the crankshaft and the conrod. It get hot fast. And the metal goes funny. And it sticks.

Good news is - it's fixable.

Bad news is - it's expensive.

**Ixion** · 13th January 2008, 21:03

OK.

Bike engines, two basic types of crankshaft. Plain bearings, like cars, and built up, with ball or roller races.

The latter use roller bearings for the big ends (the bits where the conrods rotate round the crankpin), and , usually ball races for main bearings (the ones that the crankshaft rotates in). These will not hold a pressure, and the lubrication system on these engines relies on flow not pressure. There are some exceptions, where the cam shafts run in plain bearings or direct in the head, these can hold some pressure, but generally a built up crank has very low (maybe 5-10 psi) oil pressure. So on these engines the light is usually an oil level light. Shows if the oil level is too low. Add more oil.

A plain bearing crank (like almost all cars have) is another matter. These use white metal shell bearings (always on the big end, often on the mains). A white metal bearing *ABSOLUTELY* relies on high pressure oil to avoid the metal surfaces touching and locally seizing. About 30 to 100 psi. Even the most momentary failure of pressure will cause serious damage, if the engine is under load or running at high rpm.

On a plain bearing crank, by the time you can react to the oil pressure light if it comes on at speed, your engine is wrecked. The big ends will be shot, and maybe other stuff.

An oil pressure light that comes on at low idle speed , or for a second or so when starting , is another matter. That may mean either low oil level, unsuitable oil, or just a worn engine.

Summary, on a plain bearing crank, if you see the oil light on when riding, you just toasted your engine.