Dong Fang DF250RTG

[Rangerscott]

Whats the shipping weight? Two guys should be able to lift onto a little harbor freight trailer, you think?

[Barnone]

Originally Posted by Rangerscott

Whats the shipping weight? Two guys should be able to lift onto a little harbor freight trailer, you think?

Sellers claims gross weight of 250 lbs in the crate so can your boys lift 125 lbs each?

Mine when I uncrated it several years ago. Angle iron crate in the background. It was covered in cardboard so if you remove the cardboard you will have better places to grip it.

[JerryHawk250]

Originally Posted by Barnone

I am going the other way by reducing the number of teeth by three. If the sprocket fits then I will do some "high" speed runs and check the max RPM with my mini tach and the max MPH with my speedometer app on my cell phone. Then I will swap the stock sprocket back on an compare the results.

I think you will like the gear change. I know on both my bikes it just makes the bike feel so much better not screaming at higher speeds. Less vibration as well.

[Barnone]

Originally Posted by JerryHawk250

I think you will like the gear change. I know on both my bikes it just makes the bike feel so much better not screaming at higher speeds. Less vibration as well.

I have changed the rear sprocket to a lower tooth count or the front to more teeth on almost all my bikes in the past with satisfactory results. The DF250RTG seems to like the less teeth rear sprocket just fine.

[flatlandsouth82]

[QUOTE=Barnone;338849]I have changed the rear sprocket to a lower tooth count or the front to more teeth on almost all my bikes in the past with satisfactory results. The DF250RTG seems to like the less teeth rear sprocket just fine.[/


How many teeth is the stock one

[Barnone]

[QUOTE=flatlandsouth82;391586]

Originally Posted by Barnone

I have changed the rear sprocket to a lower tooth count or the front to more teeth on almost all my bikes in the past with satisfactory results. The DF250RTG seems to like the less teeth rear sprocket just fine.[/


How many teeth is the stock one

A search on this thread would give you many answers.
rear/front
38/17 is 2.23 stock
35/17 is 2.06
34/17 is 2.00

[Dadbike26]

Originally Posted by Barnone

I have changed the rear sprocket to a lower tooth count or the front to more teeth on almost all my bikes in the past with satisfactory results. The DF250RTG seems to like the less teeth rear sprocket just fine.

Considering doing the same modification and reduce the rear sprocket in order to get better top end cruising speed.

Can anyone comment on what the new top speed is with their set up and what the new comfortable highest cruising speed.

For example I can’t imagine holding 70 mph for long at all. As it is right now on my bike 45 mph in 5th gear is comfortable, but at 55+mph it sounds like it’s working too hard, screaming and shaking.

I don’t really feel comfortable holding those high revs for long.

I should mention that my bike is relatively new, with only 500 miles of easy lower RPM riding during these 500 break in miles. I have noticed though that with every 100 miles or so that the bike seems to open up more and more, so maybe it will feel better at higher speeds in time with more miles???

Is it worth modifying the rear sprocket? What’s the new long term cruising high speed without pushing the RPMs?

[Barnone]

Originally Posted by Dadbike26

Considering doing the same modification and reduce the rear sprocket in order to get better top end cruising speed.

Can anyone comment on what the new top speed is with their set up and what the new comfortable highest cruising speed.

For example I can’t imagine holding 70 mph for long at all. As it is right now on my bike 45 mph in 5th gear is comfortable, but at 55+mph it sounds like it’s working too hard, screaming and shaking.

I don’t really feel comfortable holding those high revs for long.

I should mention that my bike is relatively new, with only 500 miles of easy lower RPM riding during these 500 break in miles. I have noticed though that with every 100 miles or so that the bike seems to open up more and more, so maybe it will feel better at higher speeds in time with more miles???

Is it worth modifying the rear sprocket? What’s the new long term cruising high speed without pushing the RPMs?

I reduced the number of teeth on the rear sprocket on my first DF years ago but don't remember the advantage. So far I am leaving my new DF completely stock. She is running just fine.

[Barnone]

The 428 35T sprocket came in a day early so I installed it this afternoon. Luckily I didn't need to shorten the chain. The stock one is stamped on the back as a 428 38T so my tooth counting was right.
Took the DF out for a short ride and she can stay in first gear longer and pulls just fine. I will take her out for some higher speed run tomorrow after I check my install.
A better test will come later when I get her up in the mountains of Western NC. I weigh 200 so you lighter guys might wanna go with a 34 tooth 428 sprocket.

38/17 is 2.23 stock
35/17 is 2.06
34/17 is 2.00

[Rangerscott]

Well crap. The one I was gonna buy from a guy got it delivered today and it was damaged and he refused delivery.

Guess I'll just play the waiting game because these arent worth $1800-$2000, especially since the chain/sprockets and carb need upgraded from the get go.

[Barnone]

Originally Posted by Rangerscott

Well crap. The one I was gonna buy from a guy got it delivered today and it was damaged and he refused delivery.

Guess I'll just play the waiting game because these arent worth $1800-$2000, especially since the chain/sprockets and carb need upgraded from the get go.

You don't have to change the sprocket, chain, or carb on the DF250RTG. I have been running mine without changing either the carb, chain,or sprocket for two years.

[JerryHawk250]

Originally Posted by Barnone

You don't have to change the sprocket, chain, or carb on the DF250RTG. I have been running mine without changing either the carb, chain,or sprocket for two years.

I agree. The carb that come on the DF250RTG are good carbs which some on here have upgrade to. As far as sprockets and chains, i'm still running stock chain and front sprocket. I changed the rear to lower the rpms at higher speeds for the interstate. Stock gearing is good if you're only riding around on back roads doing 50-60 mph.

[Barnone]

Stock carb is a PZ30. Haven't rejected it.

[JerryHawk250]

So your's didn't come with the pumper carb like my X22R?

[Barnone]

It came with the PZ30 and still has it installed unmodified. Runs just fine so I am not going to monkey with it.