You can port the head and intake manifold , fit a bigger carby plus a bigger exhaust pipe and you can also get a bottom end "torquer" or a mid range cam . Then there's a performance CDI box and a hi compression piston .....
You can't bore 110's out much because they usually have a CRF50 cylinder stud spacing ....... they're at 52.4 mm stock and a 54 mm bore leaves the cylinder sleeve only 1 mm thick at the bottom ........
Your main aim would be to maintain as much torque as possible since the engines are single speed ????
Below are pics of ported Loncin 110/120 intake manifolds . The engines are very similar to the 110 ATV full auto motors ...... left is stock , middle ported to match stock head port to stock carb exit , right is ported to match ported head to carb with 24 mm exit ( SL/XL 125 ~ 22 mm Genuine Keihin carb)
The ATV manifold is taller and straight (not angled off to the side) so the pics are to show manifold porting which you can do yourself at home with a steady hand , a variable speed hand drill , a file , and an el cheapo ball shaped stone plus a dressing stone to keep it clean from alloy clogging it up and giving a too rough "ripped" metal finish ......
It's also a good excuse to post "pretty" picci's for all the eager picture freaks out there ..... LOL ....
Top 2 pics are from head port side :
Bottom 2 pics are from carb flange side :
110cc Lifan ATV where to buy go fast parts
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