Dong Fang DF 250 RTB Bobber Information

Quote:

---

Originally Posted by mattbujor

yea I see what you mean, did you have a chain breaker or sawed off/grinded off the links? Yea I did a speed test on my 250rtc and it was always 5 below, for ex. it would say 50mph when in fact I was going 45mph

---

around here we have a few radar stations set up..they help you stay the speed on certain rods in certain neighborhoods.They are relatively accurate..I mean i drive the van down them and when it says i am doin 30 I am ..so Ride the bike down them and find I am only like 2 mph off.
but at higher speeds i would not know.. seems to me that when i am doing like 50..on the service roads..it feels like I am standing still compared to traffic.. but then again..most of the time trafiic is NOT doing the speed limit anyway.

haha funny, one thing I don't like about these bikes, it feels like I am running the engine too hard at 50mph just trying to get ahead of all the bad drivers around me

would you guys say this bike is bigger than the honda rebel?? the Honda rebels are way too small...

Quote:

---

Originally Posted by ridelikethewind

would you guys say this bike is bigger than the honda rebel?? the Honda rebels are way too small...

---

Yes, much bigger than the Rebel. It's about the same size as my Kawasaki W650.

http://i182.photobucket.com/albums/x...ah/DFside1.jpg
That's me at 5'11" and 215 lbs.

Quote:

---

Originally Posted by mattbujor

haha funny, one thing I don't like about these bikes, it feels like I am running the engine too hard at 50mph just trying to get ahead of all the bad drivers around me

---

You might try decreasing your rear sprocket size. The DF bobber is geared way too low as it comes from the factory. Don't know about your bike since it is a different model. You need to find a thread about your bike as you are comparing apples and oranges here.
Also don't forget these CG250 engines are really only 229cc, old technology, and don't make a lot of power.

Quote:

---

Originally Posted by mattbujor

yea I see what you mean, did you have a chain breaker or sawed off/grinded off the links? Yea I did a speed test on my 250rtc and it was always 5 below, for ex. it would say 50mph when in fact I was going 45mph

---

i used a chain breaker that i got for $12 from harbor freight.

Love the picture barnone. Looks like a good fit!! Thank you so much for the help my friend, I can honestly say if it wasn't for you id still be unsure about this bike.

Quote:

---

Originally Posted by ridelikethewind

Love the picture barnone. Looks like a good fit!! Thank you so much for the help my friend, I can honestly say if it wasn't for you id still be unsure about this bike.

---

Hey, don't blame it on me.

Barnone, seeing your last photo, have you considered lowering your key/igniition switch lower to the removed EPA equipment bracket? It fits!

Quote:

---

Originally Posted by mattbujor

haha funny, one thing I don't like about these bikes, it feels like I am running the engine too hard at 50mph just trying to get ahead of all the bad drivers around me

---

I changed to a 33T (35T not available at the time & was in a rush), mistake, yes 80mph(indicated & no wind) but a bitch off from stopped. As Barnone suggested 35T is the key if you have flat terraine. Back in this tread, there is a graph for rear sprocket & tire size to establish true max mph.

Quote:

---

Originally Posted by GUN ROD

I changed to a 33T (35T not available at the time & was in a rush), mistake, yes 80mph(indicated & no wind) but a bitch off from stopped. As Barnone suggested 35T is the key if you have flat terraine. Back in this tread, there is a graph for rear sprocket & tire size to establish true max mph.

---

Wow perfect if anyone remembers the page the graph was on it would be appreciated, Gun Rod when doing 80 what gear are you in and what rpms if you remember, and yea I live in miami and orlando so pretty much everything is flat. All I am looking for is to be able to do something like 60-70 mph in 4th under or around 4000 rpm if that is possible, without having to rev to like 3000rpm just to get the bike moving

Motorcycle gear/rpm/speed calculator

Quote:

---

Originally Posted by GUN ROD

Barnone, seeing your last photo, have you considered lowering your key/igniition switch lower to the removed EPA equipment bracket? It fits!

---

That's an older picture. I moved the ignition switch months ago.

Quote:

---

Originally Posted by mattbujor

Wow perfect if anyone remembers the page the graph was on it would be appreciated, Gun Rod when doing 80 what gear are you in and what rpms if you remember, and yea I live in miami and orlando so pretty much everything is flat. All I am looking for is to be able to do something like 60-70 mph in 4th under or around 4000 rpm if that is possible, without having to rev to like 3000rpm just to get the bike moving

---

With 33T rear :
5th gear at full trottle, no wind resistance , rpm unknown (6000 ? ) to reach 80 mph indicated (not recommended for any length of time, I was curious to find top speed). 4th gear good to 55mph. Comfortable cruise 60-65 (5th). Start up needs 2000 rpm. 3rd gear great around town low rpm & great sound.

Quote:

---

Originally Posted by GUN ROD

With 33T rear :
5th gear at full trottle, no wind resistance , rpm unknown (6000 ? ) to reach 80 mph indicated (not recommended for any length of time, I was curious to find top speed). 4th gear good to 55mph. Comfortable cruise 60-65 (5th). Start up needs 2000 rpm. 3rd gear great around town low rpm & great sound.

---

Gun Rod,
Did you verify your speed (80MPH) with a GPS? The last I checked my speedometer on the DF with my GPS it was way optimistic. Like 10MPH at 70MPH indicated if I remember right.

Quote:

---

Originally Posted by GUN ROD

With 33T rear :
5th gear at full trottle, no wind resistance , rpm unknown (6000 ? ) to reach 80 mph indicated (not recommended for any length of time, I was curious to find top speed). 4th gear good to 55mph. Comfortable cruise 60-65 (5th). Start up needs 2000 rpm. 3rd gear great around town low rpm & great sound.

---

wow perfect, this was exactly what I was looking for, thanks a lot man, and I dont know about the gear chart that was on here but here is the site I would like to use to http://www.gearingcommander.com/ to predict all of this out, too bad it doesnt have our bike in its database yet

Quote:

---

Originally Posted by barnone

Gun Rod,
Did you verify your speed (80MPH) with a GPS? The last I checked my speedometer on the DF with my GPS it was way optimistic. Like 10MPH at 70MPH indicated if I remember right.

---

GPS no, I keep saying "indicated", its all I've got til my wife tracts my speed next to me. ( Second Test)40 mph head wind dropped best to 68, turn around with the wind exceeded 88 mph. But I know that's false due to the conditions. Three tests (third 80+, but indicated (speedo) only!

Speedo readings (for me with all vehicles) from the mfg with original tires have been vary close to true speed. My triumph picked up the analog readings from the rear tire rotations. How does the DF pick up speed readings? By changing my rear sprocket did I affect its accuracy?

The DF has an electronic speedometer with the pickup off the front wheel so changing the rear sprocket has no effect. I know the speedometer is very optimistic. I'll run a check if I can find my GPS.

Quote:

---

Originally Posted by barnone

The DF has an electronic speedometer with the pickup off the front wheel so changing the rear sprocket has no effect. I know the speedometer is very optimistic. I'll run a check if I can find my GPS.

---

I thought the DF used a cable driven speedo and driven from the front hub.Maybe there's a difference between model years or maybe I just mistaken.

go take a look theres a 2 wire connector from the front hub pickup and the speedo , not a cable but without examination could be mistaken as 1

Quote:

---

Originally Posted by ben2go

I thought the DF used a cable driven speedo and driven from the front hub.Maybe there's a difference between model years or maybe I just mistaken.

---

ben2go,
What year DF bobber do you have?
My 2010 DF bobber has an electronic speedometer with a wired pickup on the front hub. It is not a mechanical speedometer that has a gear drive off the front wheel.

Quote:

---

Originally Posted by barnone

ben2go,
What year DF bobber do you have?
My 2010 DF bobber has an electronic speedometer with a wired pickup on the front hub. It is not a mechanical speedometer that has a gear drive off the front wheel.

---

I don't own one yet.I am going by pictures that I have seen.I've yet to see one in person.That's one of my hold backs, plus I have four bikes in various states of build.

Can someone give me accurate information on the DF's Tire sizes

Quote:

---

Originally Posted by Preacher

Can someone give me accurate information on the DF's Tire sizes

---

90/90-21 front, and 140/70-18 rear.

somebody at the gas station asked me if i built this bike cause he never one like it before, he nearly flipped his wig when i told him it was chinese, haha.

Quote:

---

Originally Posted by hooliganboy

somebody at the gas station asked me if i built this bike cause he never one like it before, he nearly flipped his wig when i told him it was chinese, haha.

---

I get alot of mixed reactions when they ask about my bike. I had a harley rider fly by me on the road..then slowed down to get next to me,and pulled into the store lot I was going to just to ask me about it. I realy was kinda caught off gaurd with his interest..so when he asked me about it,I kinda beat around the bush a little,then broke down and told him about it. He said it was a very cool bike.He said he bought his bike about a year ago..he was riding a 2010 Dyna,and paid around $16 grand....at that moment I got a grin on my face and said I paid $2400 brand spankin new for mine.I thought he crapped himself. Still I am hesitant on saying it is a chinese bike even after that,cause the readtions are always mixed..you get the oh you wasted your money, or your kidding..why? Or ..I wouldn't touch that then.But I also get the other side of the spectrum..so...when they ask I just say at first..it's a Bobber. Then if they pry a little more,I feel it out and decide from there what to tell them.
Don't get me wrong..I realy love this bike..it is awesome to me..and the looks I get from the first glances,and the comments about how 50's old school it looks..are great..but when you tell some of these conservative's where it is made..sometimes you get a look like you killed their mother or took food from their children or something. So I just start it up and ride away then.

Thanks for all the advice a few weeks ago - I finally decided to get something other than the DF for my first bike. The roads in Houston are just too bumpy for me to feel comfortable with a hardtail for my learning bike, and I think I need a little more getaway power because the drivers here are pretty aggressive. I went with a Ducati 1199. The guy at the dealership said it would be perfect for me.

jk.


2004 Suzuki. I'll make all my n00b mistakes on it. There will be a bobber in my garage at some point - just not this year. Thanks again for a great thread.

Quote:

---

Originally Posted by hooliganboy

90/90-21 front, and 140/70-18 rear.

---

Thank You very much

I noticed that the model number for this bike is MC_D250RTB at Scooterdepot. Is this still the Dong Fang DF250RTB?

Quote:

---

Originally Posted by alleykat

I noticed that the model number for this bike is MC_D250RTB at Scooterdepot. Is this still the Dong Fang DF250RTB?

---

Yep, same bike.
I bought mine from Chad at http://www.extremescooters.biz/250cc...r-chopper.aspx which seems to have a better price.