Dong Fang DF 250 RTB Bobber Information

**barnone** · 05-20-2014, 10:03 PM

Originally Posted by axa

Here you go, perhaps stocked in the US..?
i wouldn't even care if it weren't a bit pricey

http://parts.powersportsbest.com/ind...ke-engine.html

I've found some 300cc ATV engines but they were shaft drive. That one has reverse but looks to be chain drive. Overhead cam? Looks nice for the DF.

Pretty sure it is overhead cam. Dual exhaust valves or just dual exhaust ports.

img_3049.jpg

**bowtiewagon** · 05-21-2014, 12:03 AM

Well guys, I know I am not the all around motorcycle mechanic, but I try.seems my starter was not the problem. here is the scenerio.Maybe someone out there would be able to help me diagnose my problem.
Starter does what it is supposed to do, it turns the gears,trouble is she will not turn over.All i get is a starter whineing and a couple long runs on the starter and she seems to want to catch, but does not.I have spark I checked that. I thought it might be the cut off switch at the bars, feels like it wont let her turn over, but the switch is new, and is in the proper position.I wish I had a kick starter on it, then maybe I could find out for sure what it truly may be.I tried to push her in second gear and jump her, but no luck there either.
Anyone have any clues? I am at a loss at this point.maybe I just need someone to throw out a few questions for me to check out what the answer is.Always better with a second set of eyes so to speak.
Needless to say, i am quite miseable at the moment.I really love riding, and with her down, I am just sucking it big time.

**birdmove** · 05-21-2014, 12:24 AM

Your engine isn't locked up is it? There should be an access hole on the left side of the outer engine cover where you can find a big nut. You should be able to turn it over with that to make sure it's not locked up.

**barnone** · 05-21-2014, 01:18 AM

Originally Posted by birdmove

Your engine isn't locked up is it? There should be an access hole on the left side of the outer engine cover where you can find a big nut. You should be able to turn it over with that to make sure it's not locked up.

Good point.image.jpg

Photo of nut birdmove was writing about. If you can turn it with a wrench then check valve adjustment while you are there to check for internal engine problems.
Procedure at https://docs.google.com/file/d/0ByFv.../edit?hl=en_US

**bowtiewagon** · 05-21-2014, 01:52 AM

Bought the starter because that is what i thought it was. Anyway, water under the bridge there. So basically you are saying my timing might be off.makes sense.I just do not understand why it would jump timing.Originally I had started the bike like normal one morning a couple weeks ago. She is a hard start in the cold.She was running and then stalled. When I tried to re-fire her, the problems started..no start.Just a running starter. Thats when i thought the starter went bad.Did not consider it to be a timing issue. I will check all sugested at this point tomorrow. To dark now.

**birdmove** · 05-21-2014, 06:10 AM

It could be that you might have a valve clearance problem. If you have a valve stuck open, it's not going to start. If you have a valve stuck closed it's not going to run. If you remove the valve cover, and that plug on the left side of the engine, you can turn the engine over with a socket and socket wrench and you can check the clearances, and you'll be able to see the valves opening and closing. If it's a little hard to turn over, you can remove the spark plug, and it'll be much easier. You can verify if it has compression, you can just remove the spark plug, put your thumb over the spark plug hole, and spin the engine with the starter. It should blow your thumb off the spark plug hole.

**barnone** · 05-21-2014, 12:36 PM

bowtiewagon,
Please answer the questions if you want help.

I don't know enough about your problem to say it is a timing problem.

So the engine rotates and you are getting spark, right?

You checked the spark plug and it looks ok?

You are getting fuel into the cylinder by seeing a wet spark plug?

A timing light would verify that you are getting spark at the right time.

I would do what birdmove suggested using the valve adjust link from Pit I provided as a guide.

**ben2go** · 05-21-2014, 12:55 PM

Sounds like a stuck valve or possible a broken part in the valve train that's not allowing the valves to open properly.It wouldn't be the first time I have heard of a clone engine doing that.

**barnone** · 05-21-2014, 01:03 AM

Originally Posted by bowtiewagon

Well guys, I know I am not the all around motorcycle mechanic, but I try.seems my starter was not the problem. here is the scenerio.Maybe someone out there would be able to help me diagnose my problem.
Starter does what it is supposed to do, it turns the gears,trouble is she will not turn over.All i get is a starter whineing and a couple long runs on the starter and she seems to want to catch, but does not.I have spark I checked that. I thought it might be the cut off switch at the bars, feels like it wont let her turn over, but the switch is new, and is in the proper position.I wish I had a kick starter on it, then maybe I could find out for sure what it truly may be.I tried to push her in second gear and jump her, but no luck there either.
Anyone have any clues? I am at a loss at this point.maybe I just need someone to throw out a few questions for me to check out what the answer is.Always better with a second set of eyes so to speak.
Needless to say, i am quite miseable at the moment.I really love riding, and with her down, I am just sucking it big time.

You say you are getting spark so the engine must be rotating when you use the starter, right?

If the starter is causing the engine to rotate why did you try to bump start your bike?
Also why did you get a new starter if the engine was rotating?

Are you are getting fuel in the engine? What does the spark plug look like?