Dong Fang DF 250 RTB Bobber Information

[barnone]

The 33 T sprocket sure looks small compared to the 40 T stock but it did just fine on the ride out to the ranch. I ran it up to 75 MPH indicated (probably 67 or so real) and she had some left but that was enough for me. Pulls good from 30 MPH in fifth gear. Like the lack of vibration at 65 MPH indicated.
Definitely a big improvement over the stock gearing but you might want to try a 35 T to get a 2.69 ratio?

Sure makes first gear a lot more usable.

The chain is a standard 520.

BIG TIME EDIT. I got to thinking that sprocket size difference is just too great and I went out and counted the teeth on the stock DF sprocket and it has 45 teeth. I don't know where we got the 40 teeth size from but no wonder the DF was running out of first gear so quick and only capable of 65 or so MPH with the stock gearing. I need to go back and correct a few posts.