hss

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.

Samarth 619

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:



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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.

hss

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

satyenpoojary

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.

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hss

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)?

Samarth 619

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.

hss

Hmm...Thanks Samarth for the answer.