there is a open hole on the bottom of your trx250 in the casing. it is a 17mm size bolt that you have to unscrew. i am not sure how much oil to put back in but there you go. there is no oil filter
We're is oil Filter on a Honda trx 250 farm quad 2001
1.5Liter
regular
10w-40 motorcycle or ATV oil designed for wet clutches is best for your 250.
It takes 1.6 quarts of engine oil.
On a 2004 Honda TRX 250, the oil filter is located on the right side of the engine, near the oil fill cap. It is a cylindrical component that can be accessed easily for maintenance. To change the oil filter, you'll typically need to remove the plastic cover or skid plate for better access. Always ensure the engine is cool before attempting to change the oil filter.
under 2 qts of 10w40 oil
The cover to the right of the kick start that has 3 bolts
ES stands for Electric Shifts, the other has standard shifts.
It is not serviceable. You will have to split the case. Its a good 2 day job for even your Honda dealer.
1.5 liter (1.6 US qt, 1.3 Imp qt)
From what I can find the recon was not made in a 250 in 2000. There was a TRX 250 & TRX 250ES made that year?