hi guys im having a bit of a problem with my bm racing 110, when i get it started up it splutters and has loss of power and backfires,when i get the biting point it slowly tuggs away and when i release the clutch fully it cuts out (not stalling it) i seem to have a decent enough spark i really dont have a clue what it could be

and the exhaust gets really hat very quick.
i would apriate it if you could get back to me on this, cheers p.s i bought this 2nd hand and think that it has a stock carbby on it. :S