From the middle of the 2 sprockets you should have about an inch of slack or play in your chain when you lift up on the bottom of the chain with your finger if it looks a lot more then that adjust it but you don't want it to be too tight.
yea they should. They change in 97
You need to start by adjusting the middle chain . At the front of the center chain is an eccentric , loosen the two bolts and rotate it to tighten . should be as tight as you can get it . After you do the center then you do the front .There is an eccentric for the front chain also . It should be as tight as you can also .
You should be able to move the chain up and down aprox 1/2" with your fingers.
A cr250 is a motocross bike
The 1992 Honda CR250 was a part of the KZ3 model line, which lasted from 1989-2003. A crankshaft from a 1992 model should fit a 1991 model without any problems then.
it should have 1 inch to 3/4 inch slack in it
they keep your chain tight
You should not put the wrong number plate on a vehicle other than that which it is registered to, doing so is illegal.
Half inch to an inch of slack in the middle is just right.
fast the top speed on a cr250 is 85
You should be able to fit two fingers between the section where the chain touches the swingarm. It should not be crushing your fingers. Adjust the chain until it isn't too loose or smashing your fingers at all. Make sure to lubricate your chain before and after every ride
yes, its also popular to use the cr250 cdi on cr500 and trx250r to improve the ignition mapping.