Rear Sprocket: What size bit for holes X 6?

[Battery Man]

What size bit is needed for milling holes in a blank rear sprocket? This is for upgrade on stock DB30 doodlebug.

 

[burningtoad5000]

what size bolts are on your hub?

 

[Battery Man]

Bolts are "M6×20" according to parts list.

http://www.bajamotorsportsonline.com/Downloads/Parts%20Catalogs/Mini%20Bike/DB30%20Hensim%20Doodle%20Bug%2096cc%20Mini%20Bike%20(VIN%20LUAH).pdf

 

[ogygopsis]

Bolts are "M6×20" according to parts list.

http://www.bajamotorsportsonline.com/Downloads/Parts%20Catalogs/Mini%20Bike/DB30%20Hensim%20Doodle%20Bug%2096cc%20Mini%20Bike%20(VIN%20LUAH).pdf

Hey Battery....Unless I'm mistaken the M6 stands for the diameter of the bolt in millimeters which in this case would be 6mm....and the 20 stands for the length of the bolt in millimeters....Ogy

 

[delray]

battery man, you may want to read what i posted in a different thread on keeping the center hole machine out correct:thumbsup:
http://www.oldminibikes.com/forum/b...g-minibikes/9150-couple-sprocket-swap-qs.html