Two Stroke Motocross

Two Stroke Motocross Forum => Technical => Topic started by: KX250 on July 03, 2012, 08:24:15 PM

Title: DI kit Purchase
Post by: KX250 on July 03, 2012, 08:24:15 PM

How do I purchase a DI kit for my 2001 KX250 or 89 CR250?

Title: DI kit Purchase
Post by: SachsGS on July 04, 2012, 03:51:08 PM

There are rumours of EFI kits being developed for off road 2T applications but DI is much more complicated and may not be "retro-fitable".

Title: DI kit Purchase
Post by: beaner on July 05, 2012, 12:35:16 AM

I can sell you one. Are you looking for any good used bridges? 

Title: DI kit Purchase
Post by: Jeram on July 05, 2012, 05:57:10 AM

If DI kits were avaialble, you would know about it.

even for a standard EFI kit, it would be a custom one off set up requiring it to be designed, installed and dyno tuned. setting you back a few thousand dollars.

if you were knowledgable in fuel injection, bought cheeap parts, did all the work  yourself and got a decent deal for using a Dyno you could maybe do it for $1500 but will alot of stuffing about.

Title: DI kit Purchase
Post by: riffraff on July 05, 2012, 06:15:43 AM

Here you go, just have to modify things for a dirt bike


http://www.ecotrons.com/2_Stroke_Small_Engine_EFI_kit.html

Title: DI kit Purchase
Post by: factoryX on July 05, 2012, 07:03:33 AM

You can even fab yourself one using a throttle body from a street bike. Several people have done it, will it set you back thousands? No, but it will be hard to do so. Every build that I've seen someone do it has had some success, its just time consuming and you have to know what you're doing.

Title: DI kit Purchase
Post by: 2T Institute on July 05, 2012, 12:56:50 PM

Recently posted by 'smurph' the man who was first to efi a 2T from bits and pieces and a megasquirt ECU

Quote

I'm not selling the kits anymore.
There is a MPG gain and somewhat of a performance gain for the street. I say that because you can use bigger throttle bodies for EFI than you can for carbs. The EFI is less sensitive about air speed. There would be no performance gains for track use when bigger carbs are the name of the game anyway.

With a lot of time and patience, you can nail the A/F map and take out any bog, stumble, or cough that the carbs may have possessed.

Now, that being said, you do have to contend with a fuel pump, a battery, WBO2 sensors, an ECU, and the power requirements for all of the above. It can become a bit of a hassle. Especially if your battery goes dead! No smoke when the battery is dead. No amount of kicking or pushing is going to get you going. My point is that there is nothing wrong with a good set of carbs.

I bought a set of 28mm PWKs that may make it onto my 350. It seems that my battery is dead and I can't ride it. Yet my 500, which is not fuel injected and also has a dead battery, I can just kick and rip.

Steve
 _________________
 Fuel Injected RZ35

Title: DI kit Purchase
Post by: 2STROKEREVOLUTION on July 18, 2012, 11:54:11 PM

Quote from: KX250 on July 04, 2012, 03:24:15 AM

How do I purchase a DI kit for my 2001 KX250 or 89 CR250?

DI is not something that is retrofit, but EFI is. I would check out the Ecotrons kit. I talked to him once before. For my big bore it is $600 and likely needs some work to mount. It should be around $500 for a 250. I originally considered it mainly for 380s having jetting problems and altitude changes. But that money was more worth it in suspension imho. It would be pretty sweet if you have the money.