Dong Fang DF 250 RTB Bobber Information

**barnone** · 09-04-2013, 04:09 AM

Google "parts 167FMM" or "parts CG250"

167FMM off Ebay 229 cc
http://www.ebay.com/itm/New-Zongshen...2c6000&vxp=mtr

Parts and 167FMM from good dealer.
http://www.hooperimports.com/product...id=250Vertical

Here is a interesting 170FMM with a six speed transmission. 250 cc $687.19USD free shipping
More power than the 167FMM.
http://www.mbe-motorsports.com/catal...roducts_id/389
CG200_CG250_vetical_200cc_250cc_air_cooled_167FML_170FMM.jpg
Also parts there for the 167FMM.

Another 170FMM
http://www.chinesepartswholesale.com...47f7ff80cbfeda

**ProDigit** · 09-04-2013, 04:46 AM

are these engines compatible (plug and play)?

Are there any existing BBK's for the RTB and RTC's?

**axa** · 09-04-2013, 05:10 AM

[QUOTE=barnone;61987]

Originally Posted by 85highwall

Here is a interesting 170FMM with a six speed transmission. 250 cc $687.19USD free shipping
More power than the 167FMM.
http://www.mbe-motorsports.com/catal...roducts_id/389
CG200_CG250_vetical_200cc_250cc_air_cooled_167FML_170FMM.jpg

That's the engine that should have come with these bikes!
If not the elusive 400cc version...

Now someone please buy my engine for $350 and ill order one tomorrow...
3 months young, 450 miles, running like a dream...
Ill even throw in the installation!

**barnone** · 09-04-2013, 01:00 PM

Originally Posted by ProDigit

are these engines compatible (plug and play)?

Are there any existing BBK's for the RTB and RTC's?

Maybe they are plug and play but who knows? They are all CG Honda clones.

I also found a 300cc version of the CG250 in China but it is not EPA approved so can't be imported into the USA.
Maybe someone in Canada can import it?

BBK for 167FMM (also called CG250)
"Change your CG250 67mm air cooled engine (167FMM)to 70mm bore,Kit include piston kit and gasket"
at http://www.chinese-parts-canada.com/...bore_kits.html

**barnone** · 09-04-2013, 01:05 PM

Originally Posted by axa

Now someone please buy my engine for $350 and ill order one tomorrow...
3 months young, 450 miles, running like a dream...
Ill even throw in the installation!

axa,
I was thinking the same thing.

I sent MBE Motorsports an email asking if it is really a six speed and to verify 15 KW (20.39 horsepower).

**axa** · 09-04-2013, 02:08 PM

Originally Posted by barnone

axa,
I was thinking the same thing.

I sent MBE Motorsports an email asking if it is really a six speed and to verify 15 KW (20.39 horsepower).

I was all over this engine upgrade this morning, 20hp would be not only a bit surprising but well worth the time but the cost is a consideration. I'm not that far from MBN to that if its actually plausible i may take a trip to pick it up if it might save a few bucks.

Else perhaps if we get enough people interested, we can have them look at importing this 300cc cylinders you talk about, and put together a kit for us.

Another option for me if all this doesn't pan out, is to take a detour to the guangzhau motorcycle market in Baiyun when i get back to Asia next season.
Perhaps a new engine will count as a carry on...

I suppose the very last option would be to get a spare cylinder and bore it out on my lathe. Of course this is not something i want to find out i screwed up on when doing 70...

Anyway, i put the jockey shift project on permanent hiatus, all i really need is more power

**SR.MAILMAN** · 09-04-2013, 02:53 PM

Given the compression ratio (11:1) and with proper timing engine & ignition and carb size, I think the 20hp is correct.
Not mind blowing,but with the right gearing, 80mph would be possible.

I speak from experience, on My Yamaha 250.

**axa** · 09-04-2013, 04:47 PM

Originally Posted by SR.MAILMAN

Given the compression ratio (11:1) and with proper timing engine & ignition and carb size, I think the 20hp is correct.
Not mind blowing,but with the right gearing, 80mph would be possible.

I speak from experience, on My Yamaha 250.

well at any measure a far better improvement then all of these other mods going on here.
Im just not yet convinced on the cost/benefit ratio... maybe if i could actually get something for my motor...

Its official:

FOR SALE: 167FMM CG250 engine - cheap.

Hopefully google will pick up and index that...

**barnone** · 09-04-2013, 05:59 PM

I asked MBE

"is your 250cc vertical air cooled engine 170FMM really a six speed?"

and the answer from them is

"Well that is what the supplier tells us.

Thanks

Martin B.
info@mbe-motorsports.com
www.MBE-Motorsports.com"

Kind of funny answer.

Maybe we can get a group buy to lower the price.

**DanDaMan** · 09-05-2013, 05:12 AM

Originally Posted by 85highwall

I've enjoyed my Bobber for the past 2 years and was out with a friend enjoying the Natchez Trace when I heard a mechanical clank and my engine shut down. After a 3 hour wait on the road for my friend to get her truck to bring me home, I pulled the spark plug. To my suprise the sparkplug tip is damaged. I haven't pulled the cylinder head yet, but I'd like to know if anybody has found a parts supplier for the engine before I try to tear it down.

Per requests, here are photos of the spark plug. It's an NGK plug I had replaced for the original plug.

the engine still spin ?