250X to a 250R HELP!!!

[millertime1234]

I started a project of putting a 250R engine in a 250X frame. I thought it was going to be a lot easier that it is going. Everything is alright so far its just where the carb connects to the motor is causing me a problem. The flange on a 250R comes out on an angle and I need one that comes straight out. The way it is now the carb hits the frame I need a flange that bolts up to a 250R engine but comes straight out not out on an angle. Also can I use the iginiton system from the 250X on that motor or do I need to buy the ignition for a 250R? Any experts out there have any tips for me or a way I might be able to do this I'm really stuck. Thanks!

[Putt-Putt]

Go talk to MacDizzy.com If it can be done he'll
know how to do it.

[Putt-Putt]

Miller Highlife. O YEA

[wilkin250r]

One possible method would be to get an aluminum reed spacer and maching it at an angle.

[millertime1234]

What exactly do you mean but an aluminum reed spacer? What exactly would that do

[87250rxrider]

i'm working on the same type of project, and i would like to know that answer just as much as you, millertime1234. if u find out a way, than let me know!

[JDiablo]

Originally posted by millertime1234
What exactly do you mean but an aluminum reed spacer? What exactly would that do

say the part that is giving you a problem is angled to the left,get the reed spacer angle the oppostite way then then the reeds would be like this \ and the part is angled the other way,and in order for it to go on,the carb will be straight...do you get me?

[E-ATV-Racing]

Try to find your self a Boysen rad valve. (E-bay) The intake is made of aluminum. It also makes the same bend at the stock one. However, you could cut a wedge out of the pipe and weld it back together. You might even be able to cut it on an angle and rotate the peices until you get it to angle you need.

As far as the ignition get one for the 250R. I am not sure 4 stroke CDI would work on a 2 stroke. You can get a CDI off E-bay for about $10.

[E-ATV-Racing]

I am not sure the reed spacer idea would work to good. The angle on the intake boot is too large. You would also have to have wedge shaped washers so that the mounting bolts would set flat on the intake boot. The reed spacer would have to go on between the reeds and the intake boot so that the reed are still stright in the cylinder.

What year 250r motor are you using (air cooled / water cooled)? Have you though about the location for the radator?

Any ways, good luck with the project.

[millertime1234]

Yeah I haven't gotten to the radaitor yet lol one thing at a time. So I just have to get the CDI off ebay I don't have to buy anything else? Yeah I don't know what were going to do I can't weld aluminum though all I have is a millermatic mig welder.

[E-ATV-Racing]

Do you want lights? If so you also need the voltage reg. I think the 250X coil should work just fine. With a wiring diagram (250R repair manual) you can build your own wiring harnes. The only thing is you will need the connector that mates up to the CDI. You may also be able to find a wiring harnes on E-bay. If not look at service honda on the web. This may be the best way for you to go.
www.servicehonda.com

Have you looked into where you are going to route the exhaust pipe. You will have to do some cutting and welding to make it fit in the smaller frame.

I wish I had a mig welder, all I have is a stick welder. It is not so good for welding on ATV frames.

If you can post some pic of the motor in the frame.

[dirtmomma]

Hmm well my nephew just got done doing this conversion but he's not a member on here :( I could probably shoot him an email w/ a link to this though he may be able to help you out!! I'll see what I can do!!

[87250rxrider]

please do, b/c i'm also doing the conversion. if you can, please e-mail all the info and maybe some pics to a250rrider38@yahoo.com

[REV0351]

I'm attempting the same thing please send me the info too. rev_0351@yahoo.com

[wilkin250r]

I'd be interested in the details of the project. Not because I ever plan on doing it, to me it seems WAY more trouble than it is worth. However, it would actually make for interesting reading to know the problems and solutions.

[bwamos]

Agree.. but I bet it would be easy to wheelie (if that's your thing, lol). I have a hard time keeping the front end down in 4th gear on my 330ex.. let alone with a 250r engine.. lol.

[wilkin250r]

Having both a 250X and a 250r to compare and ride, I would never put a 250r engine into a 250X frame. The suspension on the 250X just isn't up to it, and it seems absurd to go through the cost of upgrading the 250X. For the expense of upgrading the 250X to the level it needs to be, I can just go buy a 250r chassis. Plus, as an added bonus for going with the 250R chassis, I don't have the complications of modifying the frame in order to fit the engine.

Now, the 350X is a different story, because it's a very easy installation, and in stock form has a smooth easy powerband.

[REV0351]

The reason why I'm interested in doing this conversion is because the engine on my '91 250x ran out of oil and siezed. I priced out replacing the parts that are bad in the engine and it would be much cheeper to put a new engine in it. I wouldn't buy a used 350x engine since they haven't made them in almost 20 years and therefore any used 350x would have significant wear on the the crank and rod. A new 350x engine goes for about $1000. I don't want to put a 300ex engine in there because that wouldn't be much of an upgade.

Now if I could get a 250r engine in there it would be a huge change and I would have something to ride while I took my time putting together a nice racing chassis for the 250r to eventually go into. Besides when a 2-stroke goes bad it is much easier and way cheeper to rebuild.

[zedicus00]

heres a link to a aluminum intake on ebay. he makes aluminum intakes, im sure if you asked hime to make you one straight he would hav no problem with that.

on a side note i am using one of his intakes on my 250r and while it was not perfect it was very much worth the 50$ (its less if you get one not polished)

http://cgi.ebay.com/ebaymotors/Honda-trx-250r-NEW-Aluminum-Intake-manifold_W0QQitemZ4574141659QQcategoryZ43979QQssPa geNameZWDVWQQrdZ1QQcmdZViewItem

[wilkin250r]

Originally posted by REV0351
I wouldn't buy a used 350x engine since they haven't made them in almost 20 years and therefore any used 350x would have significant wear on the the crank and rod. A new 350x engine goes for about $1000.

And a 250R engine is going to be a much better deal? I think any used 250r engine you find for a decent price is going to be just as much of a gamble as any used 350X engine.

If you do tackle the 300EX/250r conversion, be sure to post pictures and progress. A lot of people would be interested to see how easy or difficult it would be.