"Just bought a Honda Spada VT 250 bike a couple of days ago , Once the bike revs to about 6000 rpms in about the 4th gear there is a sputter sound in the engine"-
sputter sound..is it a like a metal crashing sound? can u hear it continuously while u are @ 6000rpm..then stop the bike and make it to the neutral..remove the air filter and slowly rev close to 6000 for couple of seconds.. then give it a sudden rush towards 8000 rpm.. and keep it there for about 10 seconds.if u can not hear any thing u dont need to be worry.. other wise u need to take it to a good mechanic quickly..
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"The bike is also terrible on fuel".
i will give u a small tip.. when u fill perol, fill it completely.then in the mean time u add petrol accordingly..dont ever let the petrol drain to the bottom..(this is a tip or a higher capacity carbulated 4 stroke bikes).......
well honda spata 250 generally do between 20 -30 kmpl..if u wanted a fuel efficient bike why on earth u went for a 250cc in the first place..u have to try suzuki gn125 if u want to have a Japanese fuel efficient bike..also if u want a japaneese 250 cc ,honda ax1 does more than 35kmpl if u drive sensibly.(close to 41kmpl)..so the best thing to do is catch a rabbit & sell it..even if u lose 10k or 15k u will be happy @ the end..