Dong Fang DF 250 RTB Bobber Information

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Originally Posted by DavidC

How is the hunt for the replacement cable?

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Well, I managed to fabricate a cable end thanks to O'reiley Auto parts.I had to modify it,but it worked for a couple days,(still works) I just purchased a new cable from a local shop.I just separated it at the split, it had the same internal hub,and attached my existing cables from the carb. The grip end does not have a threaded end on the elbow,it just sits in it, and I find it is just about 3 inches shorter than I would like it to be. Works well riding,just parked I must make sure to turn my wheel to the right to avoid pulling on it. I am going to hunt for a longer one.It was only 8 dollars for this one, so worth the use.Surprisingly my modification cable end seems to be in great shape,and I am going to carry it with me until I find/get a longer cable. I just feel sketchy about using it,the cable end basically just squishes the cable between two screw ends after you thread it through a small hole in the center. I think if I work out a few bugs on another one,it would be way better,and maybe I will do that. But I would rather find a longer cable,with an elbow that actually screws in like the one that comes on the bike.

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Originally Posted by BellaCorse

Having a difficult time finding a replacement battery. I have a TET 12N9-BS that measures 5-1/4"H x 2-7/8"D x 5-1/4"W (134mm x 73mm x 134mm). Everything I'm finding is 137 x 75 x 135 or bigger. The extra height is keeping me from inserting the battery into it's box.

What have others used for replacement batteries? Exact make and model number please.

/Mike

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I buy my battery's at Walmart. They work great. Just match the size... I also recommend buying a charger.I have gone through about four battery's before I finally broke down and purchased a charger,now I have had the same battery and recharge it every couple weeks, more during colder months, and it has lasted over a year. Fact that i am saying this, I am going to recharge it tonite just because.

I have never had a battery last less than three years and most make it seven years with me.I don't own a charger and my bikes can sit up to 6 months before I even look at them again.

Finding a proper fitting battery has been next to impossible. I've tried everywhere: WalMart, Meijers, every Auto Parts chains stores, Home Depot, Menards, Lowes, various UMJ shops, scooter shops, on-line shops... you name it, I've been there and no one has a battery.

I'm 100% convinced that the 12N9-BS designation is WRONG. It' not a size 9 but rather, a size 7. It's not unusual for a Chinese-made part to have the wrong part number on it. I bet Dong Fang got a smoking hot deal on a few thousand mis-marked batteries.

The closest I found was a 12N7 size conventional battery but it was too deep with it's overflow bung. I want an AGM battery anyway. Very frustrating... almost as frustrating as this POS 5 characters-per-minute text editor! :(

/M

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Originally Posted by BellaCorse

Finding a proper fitting battery has been next to impossible. I've tried everywhere: WalMart, Meijers, every Auto Parts chains stores, Home Depot, Menards, Lowes, various UMJ shops, scooter shops, on-line shops... you name it, I've been there and no one has a battery.

I'm 100% convinced that the 12N9-BS designation is WRONG. It' not a size 9 but rather, a size 7. It's not unusual for a Chinese-made part to have the wrong part number on it. I bet Dong Fang got a smoking hot deal on a few thousand mis-marked batteries.

The closest I found was a 12N7 size conventional battery but it was too deep with it's overflow bung. I want an AGM battery anyway. Very frustrating... almost as frustrating as this POS 5 characters-per-minute text editor! :(

/M

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Try calling batterystuff.com and tell them your problem and that you are looking for an AGM battery.They can use your battery's measurements and terminal locations to match one up.Their Scorpion AGM batteries are usually around $60-$65.I have one that has lasted me seven years without being charged or letting me down.It sits 6 to 10 months per year.

bella,Attachment 17422
I put this one n my 2012 DF.
http://www.amazon.com/Shorai-Lithium...A2-BS12+Shorai
I did some enlarging of the openings for accessing the battery terminals so it was less likely to short out and also make it easier to install safely.

Stopped at Hunting Boy's on my way home carrying a can of off road diesel fuel in the trailer.

Attachment 17423

Thanks barnone. I ended up ordering in a Battery Tender LiFo battery... the smallest one they make. Looks similar to the Shorai, about the size of a transistor radio. It started my Triumph Bonneville as well as the Yuasa YTX12-BS. Amazing. I ended-up cutting some scouring pad sheets to line the battery box so only the +12 terminal was exposed at the LH cutout. I've since found some foam rubber to line the box. I also added a charger pigtail.

Today I swapped the main jet from the 120 found in the carb to a 125. I really cannot say I felt a difference.

/M

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Originally Posted by BellaCorse

Thanks barnone. I ended up ordering in a Battery Tender LiFo battery... the smallest one they make. Looks similar to the Shorai, about the size of a transistor radio. It started my Triumph Bonneville as well as the Yuasa YTX12-BS. Amazing. I ended-up cutting some scouring pad sheets to line the battery box so only the +12 terminal was exposed at the LH cutout. I've since found some foam rubber to line the box. I also added a charger pigtail.

Today I swapped the main jet from the 120 found in the carb to a 125. I really cannot say I felt a difference.

/M

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You will need a spec charger for that lifo battery.

I have that Battery Tender battery in my CT70 clone. It is dinky but does the job. I use a Battery Tender Junior charger on it so I guess that charger is OK.
Attachment 17454

I'm going to put one of those batteries in my Z50 clone too.
Attachment 17455

Hi guys Im sorry to barge in here but Ive been posting and not had any responses and you were talking about something l need to know about.Im looking at taking my 150cc to 250cc or as big as I can go.Then I was looking for porting and 5 angle valve job and cyinder head decking.My goal is to make a supermoto with the same power to weight ratio as a 5000 dollars factory supermoto for under a thousand dollars.Im doing very well as I'm at 550 and already got 17s with tires,fmf factory 4.1 with high flo header,a big brake and lever with master, and I'm lightenng it where ever I can find weight . please help

demidestructo you are beyond help

beyond the the interests of this forum for sure.

race bikes, with limited engine size is were you will find like visions.

Im sorry , your saying no one is interested in what im talking about this bike is not for racing its just to see what are the limits of the china motors.I would think for durability someone would be surprised to know someone got a big hp number and the engine stayed together. I was going to say something really mean to Zhou but ill just not come back, and i have a 132 iq and am a savant. So I could have helped a lot probably with peoples stuff.Have fun everyone

Zhu The name is zhu . Demidestucto don't clutter this thread just reply in your own thread. Nobody answered you because ... well you just asked too many questions in one go.

Anyone know who sells this bike other than scooterdepot.com?

Thanks, Jon

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Originally Posted by demidestructo

Im sorry , your saying no one is interested in what im talking about this bike is not for racing its just to see what are the limits of the china motors.I would think for durability someone would be surprised to know someone got a big hp number and the engine stayed together. I was going to say something really mean to Zhou but ill just not come back, and i have a 132 iq and am a savant. So I could have helped a lot probably with peoples stuff.Have fun everyone

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fwiw i tried to gauge interest for such things in this thread. no bites...
you might get alot of lip service on what can and cant be done, and what the results might be but real world results are few and far between.

That said, on my 167fmm, ive done the head porting, polishing and grinded messed a bit with the valve seats. ive back cut my valves, even tried something called power rings
And a bunch of other things that I can hardly recall.
Ultimately it was the head deck to higher compression that got anything done...
Put it this way, even when going from a head with 1.25" intake valve to a head with a smaller 1" or 1.125" intake valve but with a higher compression, the head with the smaller valves gave more power.

This demonstrated to me all the porting, polishing, back-cuts, or seat angles couldn't possibly provide more airflow than a much larger valve... its all a red herring on a low power engine.

All in all I was able to gain just enough power with the head deck that im able to hold my own on the roads i dare to drive... but truth is there just so little overall potential that going after it is otherwise a large a waste of time.
I even bored out my old cylinder a half over hoping to get a hold of one of the very few 67.5mm pistons that were made for ccw by wiesco, but that looks more of a, 'so we can say we have it' item then anything that has been proven worthy.

you want to go fast, get another bike, preferably a OHC, multi valve, multi cyclinder, big bore, long stroke, high compression engine...

VERY WELL SAID !!!

Your last sentence sums it up best. I congratulate you for your humble honesty.

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Originally Posted by birdmove

Anyone know who sells this bike other than scooterdepot.com?

Thanks, Jon

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Jon,
I bought mine from Chad at http://www.extremescooters.biz/250cc...chopper-A.aspx but they are out of stock again.
They also raised the price to $2,448

They had the B model at $1999 http://www.extremescooters.biz/250cc...chopper-B.aspx
but it is also sold out.

I don't know why they can't get any more.

Other places have it. Try googling DF250RTB

I'd think about buying another DF250RTB-A if I could get it at $2100 delivered like I did my last one as I am very happy with the one I have.

Put some ammo cans on the DF.
Attachment 17602Attachment 17603Attachment 17604

can someone link me to a new 167fmm Neutral Sensor?

also does anyone have an extra pz30 choke lever? i have some 105-120 jets to trade

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Originally Posted by barnone

Put some ammo cans on the DF.
Attachment 17602Attachment 17603Attachment 17604

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What size are the cans?I been looking for 30mm ammo cans around here but can't find them.It's crazy expensive to ship two cans.

I'll have to check the size. Don't remember where I got them. I do have one 30mm but they are too big for my bikes. Some mount the 30mm under the sidecar on the Ural.

Attachment 17627Attachment 17628Attachment 17629Attachment 17630
Military Ammo Can 5.56 mm 12"x7"x8.5" 800 CRTG 5.56MM

That's a good size for small bikes.

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Originally Posted by axa

can someone link me to a new 167fmm Neutral Sensor?

also does anyone have an extra pz30 choke lever? i have some 105-120 jets to trade

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bump.

Little wet on the Dragon today but still a good ride.

Attachment 17643

Has anyone ever found a replacement rear master cylinder for DF250? or a offbrand that fits?

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Originally Posted by Babyswiss

Has anyone ever found a replacement rear master cylinder for DF250? or a offbrand that fits?

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Are you sure yours is bad,and it's not just air trapped in it?i have seen many good brake parts replaced due to trapped air.If you bleed the brakes the traditional way,by pumping the pedal and opening the bleed screw,try raising the rear so the air can travel up to the highest point easier.