Hi guys, I am not from engineering background, so excuse me if my questions sound silly to you. Here's what I want to know:

In bikes with carburetor, it is the carburetor which mixes fuel with air and passes it to engine whereas the same job is done using sensor/computer in fuel injected bikes. So, does it mean that carburetor is not needed in FI bikes?

From what I could gather, I think carburetor is still required for engine cooling purpose. So, if it's a liquid-cooled bike and when the coolant gets hot, it moves to carburetor which cools it down and then sends it back to keep the engine cool. Am I correct in understanding this? If yes, then this justifies the use of carburetor in liquid-cooled bikes. But then why is carburetor needed in air-cooled bikes?

Please do correct me wherever I am wrong.

No, coolant moves to and from the "Radiator". I'm sure you must have heard about radiator only, but confused it with carburetor.

Radiator is only present in Liquid Cooled bikes, and not air cooled ones. See, R15's front view under the fairing, you'll see a Radiator.

This is a radiator which cools down the Liquid Cooled engine:



--
And yes, carburetor is not needed in Fi bikes as the Fi system does the carburetion duties.
Carburetor is located behind the cylinder head, while Radiator in front of it.

Carburetor/ Fi serves as a food system for the engine, while radiator cools it down, that's it. These are different things.

Aah!! You are correct. I had read about radiator but confused it with carburetor . Thanks for the nice explanation. It answered my query.

The bigger hole is the block, where the carb feeds the charge (air+fuel) and the explosion using the spark happens.

The empty space surrounding the block (Cylinder) is the area where the coolant flows after being cooled in the radiator and thus help in maintain a temprature despite the explosion.

1: Are there any functional differences between conventional handlebars and clip-on handlebars?

2: Why do sports bikes have clip-ons and tourers have conventional handlebars? What difference will it make if it was the other way (i.e. conventional handlebars on sports bikes and clip-ons on tourers)?

Their usage differences:

1. Some Clip ons sold abroad are adjustable, and racing needs adjustments. Of course, it will take time before Indians get the adjustable ones on their bikes.

2. Bent rod-handlebars are not detected that easily. Clipons can be, as they usually break.

3. There is no/less chance of fitting the clip on wrongly because it mostly has precise locations for screwing it on. But a rod handlebar being fit manually can be a bit towards left or right.

4. I suspect that Clipons give better handling due to more rigidity in them. But I can't confirm this hypothesis.

Why do ...? If it was the other way around:

Cruisers/ tourers require to have wide handles so they become easy/ precise to handle. The left grip should be FAR from right grip. This makes them better city/ off road/ touring bikes which you can steer precisely through the gaps.
Clip ons if made for touring bikes, would be HUGE, HEAVY and probably not good looking at all.

That's why GT 650 is better at steering in city compared to the GT 650R, which just steers so responsively that precise steering become difficult in city.

Sportsbikes should have small handles/ clip ons, because they need to steer quick at high speeds. Hence, the distance between left grip hold and the right grip hold should be less as possible.

That said, it is possible to ride a sportsbike hard, even if it has rod handlebars but the shape of the handlebar should be far & leaned down.

Hmm...Thanks Samarth for the answer.

Re: INFO: A Guide On Technical Jargons

I am unable to consolidate the information collected over the internet. Can anybody shed some light on what a swing arm is?

Re: INFO: A Guide On Technical Jargons

in simple words.. a swing arm is the connection which holds the rear wheel to the main frame of the bike..
the pic would let you understand in a better way:



for technical know how.. Swingarm - Wikipedia, the free encyclopedia

Re: INFO: A Guide On Technical Jargons

Thank you very much [MENTION=60608]nadz11.ns[/MENTION]!

Re: INFO: A Guide On Technical Jargons

Guys can anyone explain how oil cool work I have avy220 wanna know the mechanism of oil cool engine

its not about riding bikes its about loving bikes...sandy loving avy220

Re: INFO: A Guide On Technical Jargons

^^ for you -->>

Motorcycle engine - Wikipedia, the free encyclopedia

http://**********.in/air-cooled-oil-...ooled-engines/

Re: INFO: A Guide On Technical Jargons

The "Oil Cooled" tag is somewhat of a Grammatical misrepresentation by Bajaj, and people often suffix it with "Engine", making it "Oil Cooled Engine". This is wrong. The engine is Air Cooled only, not oil cooled.

The correct interpretation of the term is "Oil IS Cooled" or "Cooled Oil".
Yes, there is a small 'oil cooler' located in the front of the motorcycle, and oil is circulated through it to keep the oil cooler.

As oil is circulated away from the hot engine and exposed to this radiator-like component, the oil gets cooler.



So basically, only the oil gets cooled a little, but not enough to cool the engine itself.

The relatively hot DTSi Engine is still largely dependent on exposure to the available air or water splash for cooling.



================================================== =====

A swingarm is like a lever which connects the rear wheel to the frame. It visibly connects to the rear wheel, but also to the frame.

The swingarm, like a lever, is vertically mobile from the frame's area (it can move up and down once bolted to the frame).
Only that it can't move so freely, because the suspension controls this vertical movement. The below is a clear picture of the Swingarm (Lightscale) alongwith the suspension, wheel & frame attached:



As the load increases on the bike, the suspension contracts.
Hence, Swingarm is like a lever, and no matter which bike you're riding, the swingarm is constantly rocking up and down (from the wheel's side) while riding, as your ride over bumps/ potholes/ any less than perfect surface.

Re: INFO: A Guide On Technical Jargons

That's really useful. I always wondered what that radiator-like thing is on my Pulsar 200 when it is not liquid cooled. Thank you Samarth.

Coming to liquid-cooled engines, so when exactly is the liquid sent to radiator for cooling? Does it have a sensor which monitors the coolant's temperature? Also, why is there a fan behind radiator? Can't natural wind's pressure cool down the hot coolant (like oil is cooled in the above pic without a fan)?

Re: INFO: A Guide On Technical Jargons

You're welcome.
Yes, an "engine temperature sensor" keeps the temperature in check. More often than not, the same sensor supplies the info to the console of your bike too. Sometimes, its a proper temperature number in Celsius (like on a CBR 600RR) and at other times, only an "overheating light" turns on, when its too hot, that's it.


Fan is obviously to cool better and more evenly. Usually, the fan stays off. Only when the temperature rises beyond a point, the fan starts. Like at 90*C the fan might start.
In some cases, this liquid cooling setup might work without a fan, but the fan is anyday better than no fan. Specially in reference to India, where a Superbike will be boiling while commuting, but staying relatively cooler at 120 kmph or so.