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trueblue450
09-29-2001, 12:44 PM
Now I know its in the EXTECH section, but I have a 300EX. I was wondering if anyone who had done it can tell me how to. I have no clue how to do this, but I heard it isn't that hard. What tools do I need, and would it be accomplishable for me seeing that I am alittle mechanically challenged.

thanks

trx400ex
10-10-2001, 07:50 PM
they are simalar, you will def need sockets wrenches and feeler gauges

Atomic83
10-10-2001, 08:12 PM
There was a question on this a few weeks ago. Search the threads and see if you can find anything. I think it is pretty much the same as the 400ex except for the size of gages.

barbwire44
10-11-2001, 01:52 PM
Ok i'll tell you the best way to do this remove youre tank put youre bike in a real open spot in youre garage grab a twenty pound sledge stand on the rear grab bar and aim for the top portion of the cylinder and start swinging then simply remove the motor mounts and install a 400ex motor and she will run 100% better.:D

trx400ex
10-11-2001, 10:45 PM
i tried that, and now i need a new engine.:mad: :mad: , how could you, i trusted you man

barbwire44
10-12-2001, 05:56 AM
trust me you'll thank me later.

10-31-2001, 03:36 PM
Just a quick question, until my shop manual arrives. Is the 400ex procedure close to the same for the new 250ex?

Thanks,

John


2001 400ex (mine)
2001 250ex (son's)
2001 Warrior (wife's)

All stock

toby400ex
09-26-2002, 08:54 PM
i wouldnt think considering the 250ex has pushrod actuated valves
:o

Ben
09-27-2002, 04:59 AM
Yep - your going to need a different procedure for the 250ex. The 300ex procedure is the same but the valve clearance specs are different than the 400ex specs.

SR71
09-30-2002, 11:44 AM
The 250EX valve adjustment is very similar to the 400 procedure. If you follow the instructions to the 400, you will be just fine. The steps that aren't necessary on the 250 will be obvious. Major differences are that the 250 only has two valves to check, and access is much easier than on the 400.

toby400ex
09-30-2002, 08:17 PM
all you will need to do it is take off the plastic, and gas tank and then you will need a 10 mm socket a crescent wrench for the valve stems if you dont have a socket small enough, i think the stem mm is like 2 or 3 mm.its easy if you do it right. just dont over torque any bolts they are weak as a mother fuc(ker.