Re: Dong Fang DF 250 RTB Bobber Information
axa, I find my shifter a bit bulky too. And quit capitulating. Your getting it all over the carpet . :lol8:
Re: Dong Fang DF 250 RTB Bobber Information
And Barnone, This is kinda weird. I have the same miles on my bobber as you do. And just finished putting two 4 inch baffles welded together in exhaust pipe. I bought the two 4 inch versions of your one. I was thinking if I got the big one it would rob power or be to quiet. I was wrong the 4 incher did very little. So I cut the bell off the other 4 incher and welded it to the end of the other unmolested 4 inch baffle with my Harbor freight sputter bug. It made about a 7-8 inch baffle that took enough of the bark out of the exhaust note. And just like you again, I noticed almost no power loss. Maybe,maybe a pinch of midrange ? But relatively neglegable considering the less obnocksious ride
Re: Dong Fang DF 250 RTB Bobber Information
Quote:
Originally Posted by
Bobthebobber
Took a ride down to one of the local parks here in RI with a beach front today. Enjoyed the nice weather for sure. She has about 380 miles now.
Funny story... There was a guy in a smart car revving his engine at me at a red light. I thought this was pretty funny.. so I actually just full throttle shifted through the first 4 gears.. until I looked over and he was about 100 feet in front of me...
In case you didn't know.. the Smart-car is the slowest accelerating car available in America as of 2012... not good not good lol. I love this bike.. but man it's embarrassing when people are honking at you for only being able to do 40 miles an hour up an incline on a 50 mph road lol. Today on my ride I had to pull off to the right of the road and turn my flashers on and allow cars to pass.. as the limit goes up to 55 on about a 1 mile stretch of hill... I wont be going that way again.. good thing I had a bandanna over my face.. because it was beat red :p
That's not a funny story, its turning out to be a tragedy that is played over and over again.
I feel your pain bro. I intentionally avoid roads like this.
This engine is coming out, one way or another, its just a matter of time.
Re: Dong Fang DF 250 RTB Bobber Information
Quote:
Originally Posted by
axa
This engine is coming out, one way or another, its just a matter of time.
That CG350 you found is looking good but at 2400 Turkish Lira ($1100 USD) it is kinda steep. We need to find the manufacturer of that engine, I bet it is Chinese.
Re: Dong Fang DF 250 RTB Bobber Information
Quote:
Originally Posted by
barnone
That CG350 you found is looking good but at 2400 Turkish Lira ($1100 USD) it is kinda steep. We need to find the manufacturer of that engine, I bet it is Chinese.
]
find a used honda XL250 motor. Its the same as the older honda xr250 motors but it's preset for electrical.. as the xl250 was a dual sport dirtbike.
my old xr250 could cruise upwards of 80 mph with stock gearing and a 20 year old motor with nothing but oil changes for maintenance.
If i remember correctly the engine was a 4 valve and put out around 25 hp at the wheel. The XL250 was a BIG deal when it first came out in the late 70's. I actually saw one on the freeway a few weeks ago doing about 75-80 mph in the high speed lane.
Re: Dong Fang DF 250 RTB Bobber Information
Quote:
Originally Posted by
Bobthebobber
]
find a used honda XL250 motor. Its the same as the older honda xr250 motors but it's preset for electrical.. as the xl250 was a dual sport dirtbike.
my old xr250 could cruise upwards of 80 mph with stock gearing and a 20 year old motor with nothing but oil changes for maintenance.
If i remember correctly the engine was a 4 valve and put out around 25 hp at the wheel. The XL250 was a BIG deal when it first came out in the late 70's. I actually saw one on the freeway a few weeks ago doing about 75-80 mph in the high speed lane.
Some of the Xl's came with a 6 speed tranny also.. since it was used on the road and not just the dirt. I think my xr250 had a 48 tooth rear (not sure what the front was) and I was able to do over 80. So if we tuned that motor for the street and put on say a 35 or 40 tooth.. you could do 90 possibly on a flat road.
Re: Dong Fang DF 250 RTB Bobber Information
To see 90MPH out of a 250cc could only happen if it's a short throw parallel twin engine (or more) with a red line on the 11k RPMs.
Ain't no way a regular 250 can pull 90! Heck, my 750 only pulls 103MPH, and that's 3x the displacement!
Re: Dong Fang DF 250 RTB Bobber Information
Quote:
Originally Posted by
ProDigit
To see 90MPH out of a 250cc could only happen if it's a short throw parallel twin engine (or more) with a red line on the 11k RPMs.
Ain't no way a regular 250 can pull 90! Heck, my 750 only pulls 103MPH, and that's 3x the displacement!
my 87 xr250 did 87-88mph gps confirmed
my 89 ninja250 did 120
and its not always about displacement.. I had a pocket bike that was registered and i would commute to work with it on the freeway.
Re: Dong Fang DF 250 RTB Bobber Information
my 250 yamaha morphous gets right up to 80 easily. and with a cvt. thats what a 250 does. what does a 229 do?
Re: Dong Fang DF 250 RTB Bobber Information
Quote:
Originally Posted by
chruk bashre
my 250 yamaha morphous gets right up to 80 easily. and with a cvt. thats what a 250 does. what does a 229 do?
chime in if there are any 229cc motorcycle owners.