BGM Bellmouth Air Filter - 52mm (H145-BGM4422)
BGM bellmouth 52 mm connecting diameter.
Nice piece of bellmouth kit, that can be used at it is or with a filter element attached.
If you decide to use the full power of your engine, than you have to bin the air filter.
* Those air filters give you lots of trouble free miles, but they do restrict the power of your engine.
With an open carb the engines is allowed to breath freely.
But -as always in life- you can improve things even further. With a bellmouth you can gain even more power.
The induced air becomes more calmed with the bellmouth. With the optimized air flow the engine produces more power over the complete rev range.
So you do see those bellmouth more often at the racing circuits and sprint meetings.
For a proper fit of the bellmouth it is advisable to use a rubber brétween it and the carb.
Be careful: If you change the air filter you also have to alter the jetting. Otherwise you risk damages to your engine.