Dong Fang DF 250 RTB Bobber Information

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My opinion for tbe DF is 5, 12,20,35,45+

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is it that low ? I do know stock was plumb awful though snowplow gearing , lol didnt realize they plowed roads in china with there motorcycles

my extreamly tall gearing is more like 25 , 45 , 60 , 70 then shift into 5th , I like not having to shift 2 times just to get across an intersection from a stoplight

my old 1981 Honda CB750F supersport would hit 65 in 1st and bury the speedo @ 95mph in the middle of third , man that was a face melting rocket sometimes I still miss her

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Originally Posted by A_Pilot

Thanks! Ill try the hair tie thing, and around here we have alot of short steep ones(mostly valleys in cincinnati) but i been riding about 5 years ill just pull tbrottle, here it's the humidity not heat.. average summer has about 80%it humidity almost everyday(jusy shy of Louisiana). The old bike barn was out of 38tSo i ordered a 35t well see how it goesand as far as shifting?My opinion for tbe DF is 5,12,20,35,45+

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I run with a 35t, shifting is close to what you say depending on how fast you want to get up to speed.when I need to get on the freeway, its like 10,22,35,45,60+normal driving..10,20,30,40,50+.

Here are some pics of the light at night. I took the picture of the front from the side because the light is so bright. You can see how white the light is. Over the handle bars it illuminating a bamboo grove. The stock headlight had a lot more shadows and it was more of a haze. With this one I can clearly see details. No flash was used for either picture. I think it is a big enough difference to be impressive.Attachment 8007Attachment 8008

Thanx for the numbers seems I should know that and kinda did- but good to see anyways :)

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Originally Posted by DanDaMan

is it that low ? I do know stock was plumb awful though snowplow gearing , lol didnt realize they plowed roads in china with there motorcycles

my extreamly tall gearing is more like 25 , 45 , 60 , 70 then shift into 5th , I like not having to shift 2 times just to get across an intersection from a stoplight

my old 1981 Honda CB750F supersport would hit 65 in 1st and bury the speedo @ 95mph in the middle of third , man that was a face melting rocket sometimes I still miss her

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Sometimes you do need gear power...

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Originally Posted by SR.MAILMAN

Sometimes you do need gear power...

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Hey mailman, noticed that you sold your bobber. Can I ask how much you got for it? Just trying to get an idea of the market value.

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Originally Posted by GonzoX

Hey mailman, noticed that you sold your bobber. Can I ask how much you got for it? Just trying to get an idea of the market value.

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I had to "give it away" at 50% off of what I paid, due to shipping (that the buyer paid for). It was the only way it would be worth it to a buyer. ( a forum member in Houston,TX. bought it).
All he had to do is put the mirrors on and gas in it, then ride. I did the PDI complete.

Finally got the email with a tracking number! My bike will be here Tuesday!

I think the seat on this thing is rubber. Anybody know if its OK to use Armoral? What do you guys use? My seat is starting to crack and get brittle from the hot TX sun.

:poke

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Originally Posted by Carolina Bobber

Finally got the email with a tracking number! My bike will be here Tuesday!

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You mean this comming Tuesday, or the second Tuesday of this week? :poke

Got your Yamalube 10w 40, and real earth magnetic oil plug ready.

Tuesday's like forever man. :taz:

And the saga continues.

Really tho that's great.

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Originally Posted by GonzoX

I think the seat on this thing is rubber. Anybody know if its OK to use Armoral? What do you guys use? My seat is starting to crack and get brittle from the hot TX sun.

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Armoral ? Sure if you are into slippin and a slidin. Do not ever put Armoral on your tires. Me? As soon as it gets cold enough that I won't ride. I am getting it covered in leather.

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Originally Posted by GonzoX

I think the seat on this thing is rubber. Anybody know if its OK to use Armoral? What do you guys use? My seat is starting to crack and get brittle from the hot TX sun.

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Perhaps your link is here, in Xinjiang! Lots of good threads in MCM, lots of good answers!

cheers

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Originally Posted by ghost1133

:poke

You mean this comming Tuesday, or the second Tuesday of this week? :poke

Got your Yamalube 10w 40, and real earth magnetic oil plug ready.

Tuesday's like forever man. :taz:

And the saga continues.

Really tho that's great.

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Tell me about it! It's been a long 3 weeks!

Tried 120 jet from the 105, cutting out full bore. Went back. How important are the washers on the needle? Trying to improve top end, frustrated.

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Originally Posted by GUN ROD

Tried 120 jet from the 105, cutting out full bore. Went back. How important are the washers on the needle? Trying to improve top end, frustrated.

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I tried the #4 washer, ran a little rough mid range. The next day I took it out. I know I could of tried another one but I wanted to ride. Maybe later on I'll play with it again. But it runs fine so maybe not. Adding a washer enriches the fuel mixture mid range.

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I got my bike up and running and took it out last night around midnight to test the headlight out. Yes, it makes a huge difference. I can see street signs, the lines painted on the road, and imperfections in the pavement. The road to my house is 65 mph, and I was able to see the turn off. The light shines down to illuminate what is directly in front of me (the cattle guard I cross) and what is ahead of me. Motorcycle Metal Steel 5" Wide 30 LED's Super… Search for that on eBay. I drove towards oncoming traffic and nobody flashed me. I've had problems with my electrical system and replaced the stator (alternator/rectifier) so I was really happy to find a system with very little draw. A lot cheaper than an HID system, and easy to do.

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Originally Posted by rollenrock

I got my bike up and running and took it out last night around midnight to test the headlight out. Yes, it makes a huge difference. I can see street signs, the lines painted on the road, and imperfections in the pavement. The road to my house is 65 mph, and I was able to see the turn off. The light shines down to illuminate what is directly in front of me (the cattle guard I cross) and what is ahead of me. Motorcycle Metal Steel 5" Wide 30 LED's Super… Search for that on eBay. I drove towards oncoming traffic and nobody flashed me. I've had problems with my electrical system and replaced the stator (alternator/rectifier) so I was really happy to find a system with very little draw. A lot cheaper than an HID system, and easy to do.

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Trouble with this is that when I would go for inspection it is required that the HIGH beams work.. you said that you do not have high beams with this rig set up.

^^ aye what he said , and it was a simple thing to install the car wire harness/headlight inside the bikes original headlight cover to get a much brighter light and have high/low beams

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55/65 watt sealed beam headlight that fits - its a , Sylvania H5006 , and the Wiring harness to go with it , fit inside the existing headlamp shell

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^^^ I understand what you are saying. I have my bike registered in Arizona and I don't have a vehicle inspection. It makes it easier for me to explore the edges. I have all the parts to return it to the original set-up, and I'm confident I could do it in less than half an hour if necessary. The brightness and visibility has increased so much that it is worth it to me.

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Originally Posted by DanDaMan

^^ aye what he said , and it was a simple thing to install the car wire harness/headlight inside the bikes original headlight cover to get a much brighter light and have high/low beams

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I went with the 35/45? I think.. but I am gonna go with the 55/65 next go around. easy enough to do. still have issues with the high beam though,already lost it on this bulb.. I am thinking I need a springed can for my lights, as these roads do some serious jarring to this bike..not to mention my teeth...

I've done just about every mod posted on this forum and have been happy with the results. I have been running a 38 tooth sprocket for about 700 miles now and been good with that, but today I put on a 35 tooth sprocket and I really like the way it cruises now. But my top end is about 70 mph. It runs really great at that speed but somehow I lost 5 mph on the top end. But I am going to keep it for awhile, 65 is fast enough and it just purrs along the highway. In town between redlights is awsome. I like it. As long as I do not feel the need to do 70 plus. It is a keeper setup. Enough is enough. It has exceeded my expectations. But I cannot stop somewhere for more than a minute without drawing a crowd. What bike is that? Who makes it? Did you build that? Is that an old bobber frame? A couple have reconized it as the Honda 185 and even as a Honda 250. But only a couple have.
Another thing, since I stopped the inner pipe in the exhaust from being loose. it no longer pops and backfires upon deceleration ? ?
Another great find from this forum. The idea of a chain tensioner from rollenrock rocked. I love it. So much smoother now. Will work with the headlight when it gets colder out. The "Df250RTB", I'm lovin it, with all of you and your help. The leather seat is next, but only when it gets cold out.

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Originally Posted by ghost1133

I've done just about every mod posted on this forum and have been happy with the results. I have been running a 38 tooth sprocket for about 700 miles now and been good with that, but today I put on a 35 tooth sprocket and I really like the way it cruises now. But my top end is about 70 mph. It runs really great at that speed but somehow I lost 5 mph on the top end. But I am going to keep it for awhile, 65 is fast enough and it just purrs along the highway. In town between redlights is awsome. I like it. As long as I do not feel the need to do 70 plus. It is a keeper setup. Enough is enough. It has exceeded my expectations. But I cannot stop somewhere for more than a minute without drawing a crowd. What bike is that? Who makes it? Did you build that? Is that an old bobber frame? A couple have reconized it as the Honda 185 and even as a Honda 250. But only a couple have. Another thing, since I stopped the inner pipe in the exhaust from being loose. it no longer pops and backfires upon deceleration ? ?Another great find from this forum. The idea of a chain tensioner from rollenrock rocked. I love it. So much smoother now. Will work with the headlight when it gets colder out. The "Df250RTB", I'm lovin it, with all of you and your help. The leather seat is next, but only when it gets cold out.Attachment 8083

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I know exactly what your sayin.. I have done some mods, and am pleased beyand anything I have done before, and i love this bike. I too get all kinds of crowds wehn i stop. I even had a cop pull over just to take a picture of it..he thought it was awesome.happy riding..keep the rubber to the road.

get that U pipe onto the air cleaner to get it into the airstream and act as an air ram , it'll improve topend

gunrod did u have the air ram when u cut out with 120 main ?

stock air cleaner is open topped and works better as a ram then the "crome topped" cleaners

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Originally Posted by DanDaMan

get that U pipe onto the air cleaner to get it into the airstream and act as an air ram , it'll improve topend

gunrod did u have the air ram when u cut out with 120 main ?

stock air cleaner is open topped and works better as a ram then the "crome topped" cleaners

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I have read about some of you using a 'ram air' intake but not seeing the set up, I have not experimented with my own version. Could one of you share a picture & where parts are available.

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Originally Posted by GUN ROD

I have read about some of you using a 'ram air' intake but not seeing the set up, I have not experimented with my own version. Could one of you share a picture & where parts are available.

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I second that request.. sound very interesting and I am just not seeing how it would be set up. Thanks.

dunno how link pic : \

I went to auto parts store and bought a radiator hose (carried in the air filter for sizing) with a 180 degree bend in it , for about $10
I searched the racks of hoses myself not the clerk
I found a 20" U bend hose that fit (same size piping as airfilter) with some other kinks and straight runs that would need to be trimmed off
cut it to 8" to only have the U shape
I bolted it to the carb the other end to the air filter with an exhaust joint (purchased at same time as radiator hose) that fit into both airfilter and hose , now I have a forward facing air intake out in the air stream - aka poormans air ram/cold air intake ( no real effect untill past 55-60 indicated )


ends up looking something like this , but the full 180 instead of only a 90 degree bend , and I sloped mine slightly down
http://www.latus-harley-davidson.com...Kit-Chrome.htm


its performance "boost" is modest at best , perhaps 1/4 of a horse power @ 65mph , guessing here at around .15 to .25 psi boost
this mod alone gave me about 5 more MPH wide open on the highway from the previous months riding (but caused me to begin running a bit lean , 110 main)
I do Mods 1 at a time and use it for a while then do another


who's to say , this may only be helping because its a cold air intake and the ram is having no effect at all , either way it helped , a tiny bit at 60+ mph

Warning - this will drown your motor if u get caught in anything more than a sprinkle (but ive found pinching my leg to tank over it allows me to keep riding , albeit uncomfortably)

Good job, Ghost. Looks awesome. I love my chain tensioner and it runs smooth, but I like how you set yours up. My garage is in storage while I am in college, so I have very few tools. Wish I had my welder to make changes. I'd like to take off my rubber seat but I worry about fabricating a mount. I actually found a wood one that I have my eye on. I haven't done the ram air intake, but I am sure I will. With the heat here, air seems to be my biggest challenge. I just hit 500 miles on mine, and I'm still falling in love on every ride.

Hey 'rock, what wood seat are you looking at if I may ask? Thanx.

Here's the seat: http://www.monstercraftsman.com/soli...seat-finished/

Want to see a really old school looking bobber.













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I'll bet this is a real conversation piece.

Thumbs up. :thumbsup: