How to Convert my E640 to 700 Blades?

[DaMayor]

Calling all Radikal's,
Hi all, can anyone tell me what parts I need in order to Convert my E640 to spin 700 Blades?
Thanks,
The Mayor

[Dennis P]

Hello most where done with the G20 TT tail boom and TT but clearance is extremely tight with 690s (I ran 660 wide cords after my 690s) . If you want to run 690-700mm cut down a G30 boom and TT as this will allow you to custom fit the boom for your application . Another thing to do when performing this modification is to install the gasser spur gear as this changes the tail drive ratio from 4.0 to 4.5 which really helps the tail with the lower head speeds . The frame holes for the transmission case will have to be slotted reword for the new gear . Slowly work at it until you have a proper backlash between the spur and auto gear. Feel free to ask questions.