i am just wondering if a 250r motor will fit into an 87 trx250x frame? i'm guessing it will require some modifications and machining to the frame and brackets, but is there anything that i should look out for, and is this an easy or hard modification?? i want to do this b/c i can't offord a whole 250r, but can i rather just get the engine and put it in my 250x instead??

 

It probably will fix because the R motor is smaller and lighter, the main problem is mounting the radiator.

 

Figuring out a way to start it might be an issue.......

 

it can be done, i saw one in the cycle trader, sain it used the stock pipe without bending it or anything, it cleared the frame

 

My Question is why you would do that? The 250x is not a frame for that motor the suspension isnt great . Look for a 250R roller and put the motor in that.