200X to a 250R?

[ATC_KING]

do you people think i could put a 83-85 250R motor in a 85 200x frame. if it would work what would i do for a pipe?
:)

[Blue250X]

I think it would be easyer to put in an 81-84 air cooled, but I'm sure you could get the water cooled to work, just find a place for the rads. You may be able to get away with using a regular 250r pipe but I can't be sure.

[ATC_KING]

i wanted to get a air cooled one. if i got a liquid cooled i would not no what to do with the cooler. :)

[nicker71]

I dont remember for sure but isnt the motor sproket on the other side on the air cooled Rs.
81-84 are air cooled and 85-86 are liquid cooled.

I have owned a 81 and 82 R and also a 86 R (pic). All stock and the 86 was much faster and more fun to ride.(side note I raced a 83R with a 300kit and we were even) I also and a couple 350X which seemed faster than the 81-82 R.
I would guess that the suspension on your X is comparable to the 83-84R and much better than the 81-82 R. If the sproket is on the other side maybe you could find a swinger from a 83-84 R and use it on your X.
Just a thought.

^^^ great looking R

[brokenmike]

on the 81-84 air cooled 250r's the sprocket is on the right side(kicker side) if you could make it so the chain is on the other side it might work. another thing to look for is the exhaust exits straight out the front and the frame might get in the way

[ATC_KING]

nice R anyway what would i do with the radiator if i went with a 250r motor after 85'? :confused:

[Slinky]

you'd be better off asking this question here http://www.3wheelerworldforums.com/index.php

if you do the swap what will you do with that 200x motor?

[wilkin250r]

Wow, it's going to be a rather obscure conversion. I doubt you'll find anybody that has done it and can give you advice.

However, there ARE a few people that make custom pipes, so that portion shouldn't be difficult. Be prepared, they're are generally more expensive than a regular off-the-shelf pipe.

[ATC_KING]

i have two 200x motors. i think that i will be the only person to do that but i dont think it would be any different from any stock 250r frame and a 200 frame. why are you looking for 200x motor?

[Slinky]

contemplating a small cc hybrid...like my 350RX hybrid...do both your motors run?

[ATC_KING]

no my motor dont run but im det them fixed in the summer what do you what me to do with them both? and blue 250 they say that the 91-94 the chain is on the right side i thought the same the 200x chain is on the left

[SET THE STAGE]

it's most definitely possible. that's what they used to race back in the day. 250r engine, 200x frame (smaller and more lightweight), 250r flat track tank and scoops, etc.

like one of the guys said, just go to 3wheelerworldforums.com and they'll let you know about anything there is to do it.

[deathman53]

keep in mind, alot of these racers were aftermarket frames that were built for a 85 250r motor. Just like the hybrid 450's, all aftermarket frames to use those motors. Also alot of money went into these bikes and they didn't use regular short track tanks, most were aftermarket tanks. A 200x frame(stock) doesn't hold up to a stronger motor. I am having a similar problem with my atc250r, the stock frame isn't holding up to my ~55 hp motor, this is my 3rd frame. Stock frames are pretty weak, new they aren't bad, but at 20+ years old?????? I am having a frame made to solve my problem.

[SET THE STAGE]

true true

[ryanh250ex]

Originally posted by deathman53
keep in mind, alot of these racers were aftermarket frames that were built for a 85 250r motor. Just like the hybrid 450's, all aftermarket frames to use those motors. Also alot of money went into these bikes and they didn't use regular short track tanks, most were aftermarket tanks. A 200x frame(stock) doesn't hold up to a stronger motor. I am having a similar problem with my atc250r, the stock frame isn't holding up to my ~55 hp motor, this is my 3rd frame. Stock frames are pretty weak, new they aren't bad, but at 20+ years old?????? I am having a frame made to solve my problem.

Guessets are your friend chris....

[deathman53]

not really, too much and your frame will crack worse and more often. The real problem is the 20+ yr old thin weak steel, it flexes alot, stretches and contracts. The 200x frame wasn't designed for that motor, its too heavy for the frame. Same thing as trx250r frames crack from 4 stroke motors, the motor is too heavy. For my atc250r frame cracking, the problem is the motor and how its ridden, it was never designed for 55 hp motor and for the jumping I do on it. There is a fine art to gusseting a frame, you actually can make them weaker, as when you strengthen one part, it puts more stress on the weaker parts. You want the frame to flex some, but not be overly stiff and don't let one part be alot stronger than the rest of the frame.

And to clarify more on the 250r short track tank on 200x's, I own a few of them, there is no way they will fit on a 200x frame, without alot of welding to the frame. My 200x, with the stock tank and cut down steering stops, turns almost as much as my short track tanks. Denting in the tank will make it turn more than a short track ever could. The way to aftermarket frames cut insanely is that everything was moved back ~1". Also consider that the racers got new frames almost every race. I know someone who worked on the pro's teams, new frames and motors almost every race. He was told by people that were around when the trikes were raced, that the practice was very similar back then.

[kfxwizzard400]

anythings possible if you have time and money

[ATC_KING]

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[ATC_KING]

how did you get that much power out of a older 250 this is mine sorry about the size i didnt know how to do it so i had a friend do it. :devil:

[deathman53]

alot of money, pipe, carb, reeds, ignition, 310pv. The chassis modded very similar as the motor to handle it.

[ATC_KING]

that is cool how much did it all cost

[deathman53]

Alot, I stopped counting after 10g's in the bike. Now I have a custom frame, custom tripples, dirtbike forks, nerf bars and other small stuff in. Thats around 3-4g's just right there.

[ATC_KING]

i would never spend that much on an older atc or atv i would buy a new ATV and put the rest in the motor and other stuff. how did you like mine in the pic you cant see my track or the nice view of the black hills. i have spent 1,200 on it all together. "that is not to bad"

[deathman53]

I love my trikes, I have to be almost forced to ride a quad. I ride my trikes alot more than my quads. I didn't own a quad for about 3 years, I didn't miss them at all. The reason I won't go and buy a new quad is I just don't like them at all, alot of maintence, they sit too high, The valve trane on a 450r is alot, when it goes which is more often than the dealer tells you, will end up costing you ~2g. There are alot of 250r motors, 350x, 200x, utilitly and similar motors that haven't needed the entire motor rebuilt, a few top ends, but nothing too costly. In 20 years, lets see how many 450r, yfz450 are around still on the original crank and maybe even top ends. On 3ww, there is quite a number of people that have big red, 350x, 200x, 185 motors that haven't had a wrench on them, excpet for valve adjustments and oil changes.

[Blue250X]

Originally posted by deathman53
I love my trikes, I have to be almost forced to ride a quad. I ride my trikes alot more than my quads. I didn't own a quad for about 3 years, I didn't miss them at all. The reason I won't go and buy a new quad is I just don't like them at all, alot of maintence, they sit too high, The valve trane on a 450r is alot, when it goes which is more often than the dealer tells you, will end up costing you ~2g. There are alot of 250r motors, 350x, 200x, utilitly and similar motors that haven't needed the entire motor rebuilt, a few top ends, but nothing too costly. In 20 years, lets see how many 450r, yfz450 are around still on the original crank and maybe even top ends. On 3ww, there is quite a number of people that have big red, 350x, 200x, 185 motors that haven't had a wrench on them, excpet for valve adjustments and oil changes.

I agree 100% I love my fourwheeler but I'd take a 350x or 250r over it any day. My one freind is actually tearing the engine out of his 400ex, and making a custom hybrid using a 250sx frame, 400ex swingarm, and a bunch of other stuff. I don't know wow well it will hold up but its gunna be a fun project

[ATC_KING]

that 400ex,250sx will be sick. i like ATV but they cost to much. like my dads 300ex(1,700) dont stand a chance next to my 200x(750) when i first bought now it is almost 1,200 in it total

[Blue250X]

Originally posted by ATC_KING
that 400ex,250sx will be sick.

Well were hoping it will be, were going to get the frame this weekend from his grandparents junkyard and were gunna see how/if it fits in there and see how/if the swingarm fits on there. Then we can go a little further.

[ATC_KING]

hope it works. if not never give up. it WILL be sick