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I would think it's possible that the wheel is not mounted perfectly straight, and the sprocket is scraping the chain.

It'll wear off over time, but try to make sure you got:
a- 2" chain play on...

You seemingly sold it?

Most people on the I95 (I've done the road) are doing at least 75MPH. I usually do it at 80MPH on my 750cc, and slowly pass other cars.
I think his speedo is a bit off, but it's not in KMH, as...

Both the regular scrapbook and scrapbook plus have these feats.
I am using FF 23.0.1

You can set it to do both... Set it to limit the download to the website "http://www.mychinamoto.com/forums/showthread.php?2738-Dong-Fang-DF-250-RTB-Bobber-Information" and set it to download 3 sub...

On Firefox, there's an add-on called 'ScrapBook', which you can install, and use to download this whole thread. The whole thread is about 80MB in size (not only text, also pics), and you can save it...

I know what you're talking about. I had a BMS TBX260 before, with CVT, but the CVT is not heaven on earth.
First of all, a cvt can only be tuned one way; either for performance, or for fuel economy....

Depends on what gearing you put on it, how you ride it, what type of gas you use (BP Premium generally generally has 10% better performance than most other fuels), wind resistance, hills, luggage,...

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...

Strange,
My Chinese TaoTao EVO150 scooter with CVT goes faster up a bridge than your 229cc motorcycle? You should have upshifted in higher revs.

Also the slowest accelerating car is the Prius C,...

Why not?
1100 + shipping & Tax comes down to ~$25.000
Add $250 per bike for shipping locally to a home address, (comes down to ~$30k) and you're selling each bike for $1500 if you'd make zero...

Well, you could go brown and green army color, or blue and grey, navy color.
The orange you mention is often called sunset orange. I had a chinese scooter like that and loved the color, especially...

Torque really depends on gearing.
250cc is 250cc, whether it comes in single or dual cylinder.

If anything, a parallel twin is probably the best of both worlds, less vibration, more continuous...

It really depends how they stack em. usually 30 bikes = 1 small container. 100 bikes = 1 big container. They sell em to dealers in containers. you can also opt for sharing a container, which costs...

It's more than likely a dealer price. Buy them in quantities of 30, meaning one container, or $30k.
I don't think those prices are single unit prices.

Some 150cc bikes are sold for $300 on...

I'm a little behind on the thread, reading up on it right now,
Just 2 questions,

1- By how much is the speedo off? (indicated MPH vs GPS verified MPH)?

and

2- Since the engine has a big...

Looks like a parallel twin, they sound more racing bike/2stroke; less bobber.

I guess I'm lucky to have an exhaust cover plate!

It's too sad that there are so few bikes out there, that are between 250cc and 500cc.
In fact, most entry motorcycles in the stores are 650cc's, and to me they're just too heavy.
Not only too...

Yup, is me.
On the BMS TBX260 I have a 100:1 ratio RPM over MPH, and the bike goes 82MPH. It's 256cc fuel injected though...
I use this RPM over MPH ratio, because it's indiscriminate against CVT...

Thanks for the comparison!
It helps me writing out my ideas.
It wouldn't surprise me, that very soon in order to meet EPA emissions, they'll look at, and optimize gearing as well as exhaust, and...

Yeah, I guess the limiting factor in using 5th gear would be, how many MPH does your bike do at 2,5k RPM?
Ideally you will want to run between 2,5 and 3k RPM. With a 100:1 RPM/MPH ratio, you'll...

Why? The info seems straight forward, it's aimed towards the RTB, not the RTC.
It's just a calculation on an optimal sprocket/gearing setup for best top speed.

It's a common error for those engines...
I guess they're meeting the emission standards for a 250cc engine, but not for the 229cc.

Concerning the gear ratio, you're still 1000RPM above the...

Thank you!
For sure, the 13T in the front is WAY too small!
Don't know if it's possible on the DongFang, but I've seen bikes that only needed a smile lid to be filed off for a larger sprocket to...