honda 185s help

[1985BigRed250ES]

I have a 185s that i put a 200s rear axle in icluding the sprocket. I also put a new chain on the wheeler. I am having trouble with the chain, while I have the rear end jacked up with it running, I can put it into gear and it tries to walk the front sprocket off the shaft on the motor, what can cause this? what can i do to correct it?

thanks

[MRSOUND]

Not trying to insult you, but are you sure your replaced it with a 200s axle? I had a problem when I put a 200s carrier on a 200e and tried to use a 200e axle. The lengths are different and will cause excessive horizontal play. Here is the link from when I had my problems. post #5 shows the 2 carriers side by side and the length difference. May not be your problem at all but maybe worth a look. http://www.3wheelerworld.com/showthread.php/143702-Help....My-rear-is-loose!-and-I-can-t-get-it-to-stop!

[1985BigRed250ES]

the 200s that the axle came out of still had the original tires and they have good tread on them, just dry rotted real bad. the axle that came out of the 200s looked brand new where it rides in the bearing carrier.

[1985BigRed250ES]

im pretty sure the 200s was all original as it looked like it had never been touched, everything on it was rusted solid......

[1985BigRed250ES]

any help on this will be greatly appreciated. I would like to fix the 3 wheeler and be done with it by this weekend.