Dong Fang DF 250 RTB Bobber Information

**Carolina Bobber** · 08-15-2012, 11:25 PM

Well here she is all decked out in good ole confederate gray. Have over 200 mile on her now. Top speed with me on her is about 60 and she's pretty wound out at that speed. I guess i'm gonna have to drop down on the sprocket. Those who have done this mod whats a good middle of the road number. I don't want to lose to much bottom end.

**GUN ROD** · 08-16-2012, 03:23 AM

Originally Posted by Carolina Bobber

Well here she is all decked out in good ole confederate gray. Have over 200 mile on her now. Top speed with me on her is about 60 and she's pretty wound out at that speed. I guess i'm gonna have to drop down on the sprocket. Those who have done this mod whats a good middle of the road number. I don't want to lose to much bottom end.

Grey is great! Keep going: Headlamp & forks.
I use a 33, don't, too small for your area's terrain. Choose a 35 to 38

**ben2go** · 08-16-2012, 03:26 AM

Originally Posted by GUN ROD

Grey is great! Keep going: Headlamp & forks.
I use a 33, don't, too small for your area's terrain. Choose a 35 to 38

I'm over in Sparkle City so yeah,38 if you're close to 200lbs and 35 if you're closer to 150lbs.

**alleykat** · 08-16-2012, 02:25 PM

Originally Posted by ben2go

I'm over in Sparkle City so yeah,38 if you're close to 200lbs and 35 if you're closer to 150lbs.

This is true. I'm at 190lbs with a 35 with no hills along the coast and sometimes wished I had a 38 lol.

**ghost1133** · 08-17-2012, 11:27 PM

Originally Posted by Carolina Bobber

Well here she is all decked out in good ole confederate gray. Have over 200 mile on her now. Top speed with me on her is about 60 and she's pretty wound out at that speed. I guess i'm gonna have to drop down on the sprocket. Those who have done this mod whats a good middle of the road number. I don't want to lose to much bottom end.]

I am about 200 lbs. I ran a 38 tooth for about 800 miles. Switched to a 35 just for the hey of it. After about 200 miles I am thinking about going back to the 38 tooth. Going to give it another couple of hundred miles to be sure. I can switch the sproket out in about 15 minutes. lol.

Like that Confederate gray, even if I am a damn Yankee.

**hooliganboy** · 08-18-2012, 12:27 PM

Originally Posted by Carolina Bobber

Well here she is all decked out in good ole confederate gray. Have over 200 mile on her now. Top speed with me on her is about 60 and she's pretty wound out at that speed. I guess i'm gonna have to drop down on the sprocket. Those who have done this mod whats a good middle of the road number. I don't want to lose to much bottom end.

i ran a 35t which was fine here in louisiana, but, at times it did feel on take off that i was in other people's way. it really didn't have the get up and go, i'd try the 38t if i were you.

**GUN ROD** · 08-20-2012, 12:26 PM

After the cornfield breakdown with my Harley friends, recharged battery and rode locally for a couple of hours last week.
Started acting up again and put it back on the charger. Lights on charger showed battery below 50% capacity again?

How do I find the issue? Magnito or something in between. Fair gearhead but not strong with electronics. Any suggestions?

Mods to electric system were new littium battery & headlamp. Confident not battery. Headlamp is halogen but only a 35/35.
(speedo removed).

**SR.MAILMAN** · 08-20-2012, 01:54 PM

http://roadstercycle.com/Stator%20Testing%20Example.htm

If this checks out then the regulator/rectifier is the next suspect. Usually, they either work or don't.

Remember, you are not working on the highest quality materials $$$.

I have changed both My bikes to mosfet R/R and Shorai batteries.
Yes, big $$$, but piece of mind electrickery speaking.

**ghost1133** · 08-20-2012, 01:55 PM

Originally Posted by GUN ROD

After the cornfield breakdown with my Harley friends, recharged battery and rode locally for a couple of hours last week.
Started acting up again and put it back on the charger. Lights on charger showed battery below 50% capacity again?

How do I find the issue? Magnito or something in between. Fair gearhead but not strong with electronics. Any suggestions?

Mods to electric system were new littium battery & headlamp. Confident not battery. Headlamp is halogen but only a 35/35.
(speedo removed).

Get a lead acid battery and put it in before messing with anything else. I've tried all kinds of batteries including gell. Nothing but problems. Sometimes would start and sometimes not. Went back to a lead and acid battery and no more problems. They are what your charging system is designed for.