[P. Schraub]

Hey Folks,
     Just became the proud owner of a UCE G5 Deluxe Bullet. The most important upgrade I can recommend is a change from the 17 tooth counter sprocket to the 18 tooth sprocket. This puts the engine at a comfortable pace on the freeway without over-revving. I can hit 85 mph easily and cruise all day at 70 mph. Thought this might be of help to new owners like myself !
                                                                      P. Schraub

[mikail gransee]

This is an old "trick" to get more speed..but watch out for those hills. 

[Maturin]

Hi Schraub!
Welcome and thx for this recommendation, I changed aswell and was just as satisfied with the result. I have to add, however, that the 46 mm sprocket was quite reluctant to move and had to be persuaded with a air pressure impact wrench with 500 Nm.
This and many other technical issues are dealt with in the UCE-section in this forum above. Have a look!