NO MORE PRE-MIX?!? A poll for trail riders

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#1
Just an idea I'm thinking of and I'm looking for enthusiam and thoughts. The thought is to have a seperate oil resevoir and an easily adjustable premix level so that trail riders can go for hundreds of miles and not have to worry about pre-mix or carrying extra oil. Kinda like the old bikes but easily attached to your KDX. What do you guys think? How much would you pay for a system such as this? Does it already exist?
 
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#2
Heaps of Australian model KDX's were fitted with oil injection, oil res went under the fuel tank (metal) and the oil pump was located between the kick starter and the carb.
 

Braahp

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#5
No way! I much rather know thsat the correct amount of oil is getting to my cylinders. What if the injector fails? Kaboom. Besides....whats the big deal about pre-mixing? Nothing to it....or carrying oil either. Heck i can't ride much over 1 full tank (60 hardcore miles) anyways without being just totally give out. After having jetskis I feel like I never have to put much gas in this KDX!
 
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#6
Like you said they used to do it on some older and smaller bikes. I have a bike that has this setup. I get 2 tanks of gas per tank of premix. The pump is very reliable. 14,000 miles without a failure.

There are a couple of reasons I wouldn't do this on a dirtbike. First is the extra weight of the pump and the premix tank. Then there's the added components. A pump that needs adjusting, an oil line to run to the carb that might catch a tree branch. Simpler seems better in most cases in the dirt.
 

HiG4s

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#7
Originally posted by JohninKY
Like you said they used to do it on some older and smaller bikes. I have a bike that has this setup. I get 2 tanks of gas per tank of premix. The pump is very reliable. 14,000 miles without a failure.

There are a couple of reasons I wouldn't do this on a dirtbike. First is the extra weight of the pump and the premix tank. Then there's the added components. A pump that needs adjusting, an oil line to run to the carb that might catch a tree branch. Simpler seems better in most cases in the dirt.
heavier and more complicated VS the 4-strokes we will all be force to use in the near future? Outboards now all use oil injection, it helps them meet emissions standards by only using high mix ratios when the engine actually needs it. I would rather have oil injection than no choice but 4-strokes.
 

ktmboy

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#10
My Acerbis fanny pack came with an oil bottle which I have marked at 1 gallon increments. It holds enough oil to mix 3 gallons, so if I find myself coming up short on fuel, I simply pull into the pumps, and mix right in the tank! No big deal to me, IMO, and I know the mix is correct.:D
 
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#11
I keep cut & pasting this so excuse if this is a repeat of DTs replys;

Oil injection has the advantage that when you run out of gas in the middle of nowhere you can blag some straight petrol from the local farmer.

Many people slag off oil injection which works just fine in zillions of road bikes everywhere. These old world closed minded people cannot accept the risk that the oil pump mechanism will continue to meter oil reliably into your precious engine.

When I discovered (just in time) that my oil level of my old DT200 was not going down I became one of these people.

We meet on Tuesday nights.
 

HiG4s

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#12
Originally posted by David Trustrum
I keep cut & pasting this so excuse if this is a repeat of DTs replys;

Oil injection has the advantage that when you run out of gas in the middle of nowhere you can blag some straight petrol from the local farmer.

Many people slag off oil injection which works just fine in zillions of road bikes everywhere. These old world closed minded people cannot accept the risk that the oil pump mechanism will continue to meter oil reliably into your precious engine.

When I discovered (just in time) that my oil level of my old DT200 was not going down I became one of these people.

We meet on Tuesday nights.
Hey, we better go back to air cooling, 'cause how do we know that water pump is really working.
 

MADisher

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#13
Hey, we better go back to air cooling, 'cause how do we know that water pump is really working.
Yes, and double over coil shocks on the rear too, cause those mono-shock swing arm linkages sure are complicated, They can't be as sturdy..

Who really needs more than an inch or two of travel anyways :p
 
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#14
Originally posted by HiG4s


Hey, we better go back to air cooling, 'cause how do we know that water pump is really working.
Oh my god, you're right. Let's move this thread to the modifications forum so we can talk about proper sizing and welding techniques for adding cooling fins to the KDX cylinder.:silly:

Seriously, I think the water pump phobic meet on Thursdays.