"Thinking out loud" CR125 powered 200x

[bkm]

I have been really intrigued lately with the 200x's on the site from different members, but I really don't care for the engine. I love two strokes and have been thinking Has anyone on here put a cr125 engine inside a 200x? If so please chime in, even if you have a buddy who has done one.

I would like everyones thoughts Pro's & Con's. I am invisioning a factory color powdercoated frame, aftermarket swinger, low profile rear fenders, number plate, 18" rear tires, extended axle, 250r front tire, Mosh blue seat with 125R on the side. Just a cool little screamer.

Flame away

[Xpress]

Do it! What's the worst that could happen? You get a 125CC pile of poo?

[Brockey]

I know someone here put a 2 stroke in a 200x. Trying to remember who. A fello Canadian I believe. It was not a Honda motor tho. I agree with your idea. I had a 83-85 200x but love the look of the 86-87. That would be the one to put it in. Most people talk about the frame not being strong enough or the suspension to handle a 250r motor. I believe after some frame mods for fitment, then added gussets it would be perfect for the 125. The suspension can be worked on after you try it.
i'd so go for it. Someone will chime in with the member who put a 2 stroke in one. I was thinking and almost bought a cr60 and or cr80 for the bike I got off you. I have a motor now from Ceaserthethird so I might not do it but have been thinking really hard about it.
Cheers

[Brockey]

Ok I just done a search and it's been done for racing. Just have a search. Even found pics.

[KASEY]

yep back in the day it was common ,, seen alot of them,,

[Thorpe]

Maybe not geared for the top end as much as the 250R... But could be a fun little trike!

[tecat-z]

Cool project that's been done. A very nice example can be seen at TF. My only reservation on doing such a swap is the very small size of the transmission. 125's have extremely small gears that may not be able to cope with the loads that a atv will put on it long term. Not just in terms of input power either. Bikes rely heavily on wheel spin to protect the trans from breaking under not only full power, but in on/off throttle and landing situations where the tires of an atv will not drag. The XR based trans of a 200x was small in size relative to many other atv transmissions, but still had much beefier gears due to it not being built to save every last ounce of weight like a 125cc mx bike. Experience has shown me that excessive weight is the number 1 cause of "small machine" transmission failure. If you're able to have some restraint, and ride it with care, it would make a fun project. But be aware that heavy overall weight, lack of flywheel effect, and an engine that develops very little torque will make for an all or nothing type of riding style that will be MUCH more favorable to hard flat terrain, than say soft sand, or mud for example.

[hang&rattle]

Ol Deuce on here did a 175 Elsinore in a 200x. Pretty cool rig. It's a sceamer compared to the slow 200x motor. And it's a good idea, the 200x motor is junk and anything would be an upgrade. I'd love to see a smoker in the 200x chasis, they're sorta a cool little trike.

[1985250rlover]

I ran a 144 big bore port polished cr 125 in a 85 200x chassis, wen it was first built it lacked alot of power but I built it to he'll and it ran like a scolded ape.... But I sold it prob 3 months ago

[bkm]

Cool project that's been done. A very nice example can be seen at TF. My only reservation on doing such a swap is the very small size of the transmission. 125's have extremely small gears that may not be able to cope with the loads that a atv will put on it long term. Not just in terms of input power either. Bikes rely heavily on wheel spin to protect the trans from breaking under not only full power, but in on/off throttle and landing situations where the tires of an atv will not drag. The XR based trans of a 200x was small in size relative to many other atv transmissions, but still had much beefier gears due to it not being built to save every last ounce of weight like a 125cc mx bike. Experience has shown me that excessive weight is the number 1 cause of "small machine" transmission failure. If you're able to have some restraint, and ride it with care, it would make a fun project. But be aware that heavy overall weight, lack of flywheel effect, and an engine that develops very little torque will make for an all or nothing type of riding style that will be MUCH more favorable to hard flat terrain, than say soft sand, or mud for example.

Good info from all. The trans as well is really the one thing that has me considering engine choice. I really love the look of the 200x and I agree a smoker would be cool. This is more of pipe dream at this time because I still have to put my 350x together. I'm really just kinda picking some brains here. Thanks fella's.

[Xpress]

the 200x motor is junk and anything would be an upgrade

I don't think the 1st gen 200x motors were junk, they are pretty good little powerplants for the size of machine they drive. Sure they're not the powerhorses the 2nd gens are, but it's still a good little powerplant.

[KASEY]

so did you take any pictures of this 144 ?????

[leviblue]

very common back in the 80's and I have one that my father built my brother. 86 cr 125 with a 84 200X. It's apart and under restoration and will be finished once my brothers tour is over and he's back home. I have no scaner but I'll get pics as soon as I get to the shop.

[bkm]

very common back in the 80's and I have one that my father built my brother. 86 cr 125 with a 84 200X. It's apart and under restoration and will be finished once my brothers tour is over and he's back home. I have no scaner but I'll get pics as soon as I get to the shop.

Please do I would love to see them.

[hang&rattle]

I don't think the 1st gen 200x motors were junk, they are pretty good little powerplants for the size of machine they drive. Sure they're not the powerhorses the 2nd gens are, but it's still a good little powerplant.

How's yours running? I said nothing of power verses a later year.