I just got a 05 Ricon, and do not know how much oil, or if there is a filter or gap on the plugs, what kind of air filter goes on it. She runs good but needs a small tune up for a new base line. Thanks for all of the help in advance.
Not sure on the quanity of oil but use GN4 or HN4 Honda oil ... maybe a quart the recon 250 is just like the 250EX sport quad the plastics make the difference. there is no oil filter and most NGK plugs you buy are pre-gapped. I would get a UNI with a pre-filter sock.
This info from the owner's manual for my son's 09 Recon that he's getting for Christmas:
Oil Capacity: 1.6 quarts after draining.
2 quarts after a rebuild
Oil suggested: SG or higher rating but must not have "Energy Conserving" in the
round label on the container. SAE 10w-30, JASO T 903 Standard
MA, Pro Honda GN4 or an equivalent motorcycle oil.
Spark Plug: NGK DPR8EA-9 or DENSO X24EPR-U9 (standard plug)
Spark Plug Gap: 0.031--0.035"
You can use 10w-40 oil also per the manual in warmer temps. I will use Shell Rotella synthetic 5W-40 when I change the oil the second time in this new Recon. I use it in all the other atvs as well as my Yamaha V Star motorcyle with great results. Shell oils are now rated JASO MA as well.
I just bought a used 2005 Recon 250 and I don't have the owners manual but I have a Chilton manual and it shows what ddrumman2004 showed above. No filter and 1.6 qts 10W30 or 10W40 oil for a regular oil change. I looked at all the oil in the autoparts stores and they were all the wrong "s" # or they said "energy conserving" so I ended up going with Honda's overpriced GN4 at $4.99 a qt just to be safe.