Running on Reserve - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 25 (permalink) Old 03-30-2012, 12:43 PM Thread Starter
Crap, I WAS in 5th gear.
 
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Running on Reserve

I just keep my petcock on reserve all the time. One time fumbling with the petcock in the fast lane during rush hour was enough. I know, should have filled up earlier.

I can go about 150 miles in my normal commute and still have 1/4 gallon left. This is with a stock-sized front tire. 150 miles happens to be a very convenient multiple of my daily commute mileage.

Here's my theory:

The main drawback is that the tank does not act as a sediment trap.
The main benefit is tank does not act as a sediment trap.

Let me explain. You might say that running in reserve would cause sediment to go to your carbs, but I think that if you run in the normal petcock position and then switch to reserve just ONCE, you are in a worse condition since now the sediment is concentrated and has had a chance to coagulate.

I do drain by carb traps occasionally, and don't see much in there. I suppose I could add a filter, but that's just another item to fail. The holes in the pilot jets are actually fairly large compared to what I've seen come out of the carb drains.
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post #2 of 25 (permalink) Old 03-30-2012, 12:58 PM
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It is a good idea to run in the reserve position periodically to keep the water and sediment burt out. However, that is my opinion. It just seem like a good idea to me.

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post #3 of 25 (permalink) Old 03-30-2012, 12:59 PM
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The mesh on the petcock is quite fine. I wouldn't think anything making it thru the mesh would clog your jets. I think it's more likely a built up accumulation on the jets.
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post #4 of 25 (permalink) Old 03-30-2012, 01:04 PM
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Or you could just keep your tank clean.

To be accurate, the "reserve" tube in the tank is still higher than the floor of the tank so you really shouldn't be getting any "sediment" no matter which position you put the petcock.

The point of the reserve is kinda lost on a bike that has a fuel gauge to begin with, but I appreciated having the reserve setting do if I somehow screwed up, I'd still have that extra bit of fuel.

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post #5 of 25 (permalink) Old 03-30-2012, 01:08 PM
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If you never use your reserve, does the same gas just sit in there?

I've had to switch to reserve in the Middle of the NY Thruway once, NOT a pleasant experience. I'd rather just keep it on reserve the whole time but wasn't sure if that would screw anything up....



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post #6 of 25 (permalink) Old 03-30-2012, 01:31 PM
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both the reserve and the main draw from the same fuel. Just the reserve draws from further down so the fuel will not just "sit' there.
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post #7 of 25 (permalink) Old 03-30-2012, 02:19 PM
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Quote:
Originally Posted by peterherrm View Post
I've had to switch to reserve in the Middle of the NY Thruway once, NOT a pleasant experience. I'd rather just keep it on reserve the whole time but wasn't sure if that would screw anything up....
How was that worse that actually running out of gas???

You know, it does not take too much practice to learn how to switch over to reserve quickly and safely.... Just another aspect of learning how to ride a motorcycle in my book.....

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post #8 of 25 (permalink) Old 03-30-2012, 02:36 PM
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Quote:
Originally Posted by Knifemaker View Post
How was that worse that actually running out of gas???

You know, it does not take too much practice to learn how to switch over to reserve quickly and safely.... Just another aspect of learning how to ride a motorcycle in my book.....
I never said it was worse than running out of gas. And anyway, I had to switch it on the thruway because I DID run out of gas. Was just sharing an experience I had while learning the bike. It was my first ride on the bike long distance and the gauge was less than accurate.



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Bought 4/2011 28k Miles,
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post #9 of 25 (permalink) Old 03-30-2012, 03:34 PM Thread Starter
Crap, I WAS in 5th gear.
 
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My cousin had plenty of practice switching to reserve- he did it all the time, until he hit a semi head-on with 100mph+ closing speed. "Safely" is a threshold term and depends on [your personal] risk tolerance. My risk tolerance is fairly high (I ride a bike,) but increasing the complexity of any task tends to make it inherently less safe. RIP Paul.
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post #10 of 25 (permalink) Old 03-30-2012, 04:31 PM
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Every time you start, stop, or turn the tank moves which meens that your gas gets shaken up preventing sediment. You would only get that if the bike stis still and does not move. adn yes the reserv and run takes from teh same gas, reserve is just a little lower.
Run a little Sea Foam every couple of tanks and you will never have a problem with water or dirt unless you put it in there or neglect.

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