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#6211 Re: what this bike should have been from the start10-28-2017, 03:10 PM
These engines, while OEM'd specifically by Zongshen for Dongfang, are pretty much the same as numerous other Zongshen and other brands' thumpers as found on chinariders.net under the dual-sport and off-road sections. Many members have had good experiences with the engines as long as you don't try to modify them internally. For performance, you are limited to exhaust and carb, and gearing. However, there aren't too many Dongfang bikes on chinariders, so you are really going with advice in general, vs. specific, like you are here; nevertheless, I would read up on the dual-sports to see what people do with various brands' engines (i.e. RPS Hawk and Magician, and Bashan's Brozz, Shark, and Enforcer).
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#6212 Re: what this bike should have been from the start10-29-2017, 07:59 PM
if I regularly swapped engines I could tell you if it was comparatively an easy job or not but I don't so can't. with the right tools I wouldn't consider it a difficult job. but I'm not completed yet as other things came up I had to put this away
there are ohc engines that may or may not drop in easier, I couldn't get my hands on one cheap to know.Last edited by axa; 12-09-2017 at 10:26 PM.
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#6213 Re: what this bike should have been from the start
- Join Date
- Oct 2017
- Location
- Ashland, MO
- Posts
- 18
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#6214 Re: what this bike should have been from the start
- Join Date
- Oct 2017
- Location
- Ashland, MO
- Posts
- 18
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#6215 Re: what this bike should have been from the start11-04-2017, 02:49 AM
had the same happen to me, didn't brake the line though.
so I have to ask you, where are you expecting to acquire, and how much are you expecting to pay for this engine?
then have you explored the serviceability, I mean obtaining parts for this new, likely expensive investment.
I'm curious.
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#6216 Re: what this bike should have been from the start
- Join Date
- Oct 2017
- Location
- Ashland, MO
- Posts
- 18
11-05-2017, 03:11 AMThese engines are usually available on Ebay, Alliexpress, or Alibaba etc... I believe the 350 is $1100 on ebay & is used in many ATVs. It can probably be purchased for less if going through Alibaba.
Shineray and Zongshen also manufacture 170 or 177MM? 250cc 4 valve race engines that I think are stated near 25hp at $1100. Just thoughts at this time.
I've also wondered an old Honda cb360 might be a good fit.
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#6217 Re: what this bike should have been from the start11-09-2017, 11:48 PM
ok. though i think many would say the same thing about the 167fmm.
which is also available on ebay, but at an exacerbated price. Its likely the same case for these engines you're listing.
And considering alibaba, your going to have to do some serious digging to find a distributor that will send you just one engine, and then at a reasonable price. And then cross your fingers that it has the proper epa paperwork to get through customs. i haven't gone through it but dig around and you'll find others that found it needed.
Then when it gets down to it and you finally need a part, its hit or miss...
For example try finding something as simple as push rod for the 167fmm... i finally found one but it took a looooong time.
Anyway, anythings possible, just matters how much you want to give up or how hard you want to try...
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#6218 Re: what this bike should have been from the start
- Join Date
- Oct 2017
- Location
- Ashland, MO
- Posts
- 18
11-20-2017, 06:58 PM20171120_114959.jpg20171120_115221.jpg20171120_115241.jpg
Some photos of my 2016 DF250RTA. I want to thank you fellas that have done all the hard work figuring out what is the best for our bikes. Here are my mods:
-Removed evap & new air filter
-Drilled cat
-NGK Plug
-38 tooth rear sprocket (so much better!)
-110 main jet in my Denki Carb. This made a huge difference for performance. It had an 88! (I used "6 sigma jets" for a kit but could not get it to start with the 42 slow provided). Had a washer under the needle but it seemed to cause a rough idle.
Plans are to get a larger seat and maybe deck the head in the spring. This is a great running bike!
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#6219 Re: Dong Fang DF 250 RTB Bobber Information
- Join Date
- Oct 2017
- Location
- Ashland, MO
- Posts
- 18
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#6220 Re: Dong Fang DF 250 RTB Bobber Information12-03-2017, 06:51 PM
I like the seat on the left. That is initially what the bike came with, but a real cheap version. I changed mine out only due to stress wear and breakage after 20,000 miles. So now the seat I have is similar to the shape of yours shown on the right. I wish I had the old seat back.Way more comfortable on your rear ,especially on bumpy roads.The narrow seat seems to only support a certain aspect of your behind. Both are nice.
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