Dong Fang DF 250 RTB Bobber Information

**barnone** · 07-03-2013, 03:10 AM

I should be topped out at about 65 MPH with the 35 tooth rear sprocket with a cruise at 55 to 60 MPH which is fine for me here in the mountains.
45 divided by 35 equals 1.3 times 50 equals 65

My bike feels like it might need jet changes at the higher rpm like the 2010 did. I'll have to take a look at the jets.
Reading through the post I found that the 2012 still has the 105 main and 40 pilot.
So I gonna go with the 108 and 42 to richen her up a bit.

**GonzoX** · 07-03-2013, 05:33 AM

Originally Posted by culcune

A few people have started DF 250 threads; I have suggested to post on the 'original' thread simply because that is what brings people to mychinamoto from Google (those with DF). But I see the point of going over 3000 pages being difficult-I am sure there will be double posts, if not triple, or more by now, so if someone new brings up a question that had been discussed a couple years ago, I bet there are others who would also like an answer. Thanks for sticking around, 4950cycle!

Agreed. Most questions have been answered several times in this thread. Considering it's size I would do a search in this thread before posting. I always try to do that first. Either way, this forum is newb friendly thank God as I am defenitely a noob. Only been riding for one year now.

**ghost1133** · 07-03-2013, 01:36 PM

http://s1074.photobucket.com/user/gh...tml?sort=3&o=0

For fun

**barnone** · 07-03-2013, 07:40 PM

Raining here big time so I changed out the rear sprocket to a 35 tooth one. I removed about three link in the chain.

IMG_2098.jpg
Checked the wheel for balance and true and it was just about perfect.

https://picasaweb.google.com/1091387...71657308021714

IMG_2101.JPG

Hope I didn't go too small on the sprocket.
IMG_2102.jpg

**4950cycle** · 07-03-2013, 09:14 PM

I wouldn't think you have gone to small. If I remember right they come with a 12 or 13 on the front. That being said, I have a 15 on the front and a 38 out back. You are only 3 teeth less than I have for rear. And 2 to 3 teeth less in the front. If I remember the old rough formula was 1 tooth up front is equivalent to 4 in the rear. Skip all that mumbo jumbo, Bottom line, I still have taller gearing than you do even with your 35 and mine is spot on for my 250 lbs., 6"3 butt. My guess is you'll want to go with a 14 tooth up front to go even taller once you test it out. Unless you like it quick instead of higher top end.

**Gearhead45** · 07-04-2013, 01:12 AM

I'm brand new to the forum, but it looked like some good info on here. I'm really considering getting one of these df bobbers, and suggestions on who to order from? Any direction would be greatly appreciated.

**ghost1133** · 07-04-2013, 02:20 AM

Don't pay any attention to these jokers. It is a good bike. It runs..

**barnone** · 07-04-2013, 02:52 AM

Originally Posted by Gearhead45

I'm brand new to the forum, but it looked like some good info on here. I'm really considering getting one of these df bobbers, and suggestions on who to order from? Any direction would be greatly appreciated.

Gearhead45,
I have ordered two DFs from Chad at http://www.extremescooters.biz/gas-p...-choppers.aspx with good service from him.
BUT be sure and check that you can register the DF in Colorado.

**barnone** · 07-04-2013, 02:54 AM

Originally Posted by ghost1133

Don't pay any attention to these jokers. It is a good bike. It runs..

What? Which jokers?

**Gearhead45** · 07-04-2013, 06:49 AM

I appreciate the help. Still talking to the wife, you know how that's goes. Haha. Probably going to order one in the next week. I know these china bikes have some issues, I've been a mechanic for a few years though so no worries. Any heads up on issues with these?