Results 5,101 to 5,110 of 6336
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#5101 Re: Dong Fang DF 250 RTB Bobber Information06-25-2014, 04:05 AM
All the same engine...
As for weight, I had my gf take a spin, she's like 105, far less than Dan
I would believe compensates for the different bike game, if any.
I've not read about anyone with his bike achieving what is claimed anyway, though they don't have a forum to make it known...
I also once had a 35# hunk of metal in my back pack, didn't notice much of a difference otherwise...
And this is because at highway speeds the primary factor is overcoming wind resistance not the delta of already moving mass...
I'm going to look at the chain/ratio discrepancy... Occam's razor...
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#5102 Re: Dong Fang DF 250 RTB Bobber Information
- Join Date
- Aug 2011
- Location
- texas
- Posts
- 266
06-25-2014, 04:17 AM1 more thing to concider , my butt is not even knee high off ground , with legs near straight out , thus about foot closer to the ground than u guys and thus less air resistance
but im not saying don't change chain and sprocket , if u have the cash burning a hole , 1 to 1.5 hp , gained from chain swap on a 10 hp motor can be significant , like another 6-7 mph
but do note , article was a 1000 ninja (so less gain to be xpected), but it did say 530 to 520chains not the much more drastic (520 to 428 hd) I use
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#5103 Re: Dong Fang DF 250 RTB Bobber Information06-25-2014, 12:19 PMVince
2021 Ural cT
2022 Dong Fang DF250RTG
2021 Ice Bear 150cc scooter
2020 Ice Bear 150cc Scooter
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#5104 Re: Dong Fang DF 250 RTB Bobber Information06-25-2014, 12:23 PM
Last edited by barnone; 06-25-2014 at 12:46 PM.
Vince
2021 Ural cT
2022 Dong Fang DF250RTG
2021 Ice Bear 150cc scooter
2020 Ice Bear 150cc Scooter
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#5105 Re: Dong Fang DF 250 RTB Bobber Information
- Join Date
- Dec 2013
- Location
- TX
- Posts
- 92
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#5106 Re: Dong Fang DF 250 RTB Bobber Information
- Join Date
- Dec 2013
- Location
- TX
- Posts
- 92
06-26-2014, 12:00 PMShe's running really nice now but I was concered about the valves so I ran compression this AM. She cranks up 162 psi. Steady climb in about 3 - 4 revolutions. Repeated 3 times with same results. This is with the engine warm, valves set at .002 and .004, choke off and throttle wide open. I was worried about valve damage. Not so much, now.
Checked the plug while I had it out. She is running a little lean so I need to mess with that some.
My set-up: 2012 B model, performance CDI with 4 degree advance, performance coil, Iriduim plug gapped to .028, 30mm Mikuni VM carb with stock needles and jet needle at highest setting, EPA crap removed and plugged, Stock size air filter without the crankcase breather fitting, 35T rear sprocket.
The total cost of all mods was about $100 - 125 and I now have spares for everything.Last edited by Roadkill; 06-26-2014 at 12:21 PM.
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#5107 Re: Dong Fang DF 250 RTB Bobber Information06-26-2014, 05:42 PM
I have one of those performance CDIs which I haven't installed. Need to figure out some sort of test before and after to see it it does any good.
Vince
2021 Ural cT
2022 Dong Fang DF250RTG
2021 Ice Bear 150cc scooter
2020 Ice Bear 150cc Scooter
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#5108 Re: Dong Fang DF 250 RTB Bobber Information
- Join Date
- Dec 2013
- Location
- TX
- Posts
- 92
06-26-2014, 05:49 PMMine feels a little stronger at mid-range. Maybe because it's supposed to have the advance in that range. Maybe it's just a placebo. I live in town and don't really have a place to check top speed. Keep hitting traffic lights. I had one on my trike and had kick back problems on start. I've seen them with adjustable advance.
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#5109 Re: Dong Fang DF 250 RTB Bobber Information
- Join Date
- Aug 2011
- Location
- texas
- Posts
- 266
06-26-2014, 10:26 PMgood to here your resolved roadkill , if ever heading to Austin shout out ill meet ya somewhere let ya see my moped in action
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#5110 Re: Dong Fang DF 250 RTB Bobber Information06-26-2014, 11:02 PM
You really should take him up on that offer... It's not every day your invited to witness the world's fastest 167FMM...
2012 DF250RTB_B with Yamaha XV250 V-twin
1998 XVS650 (For Sale)
2003 LS650 with Voodoo Vintage hardtail
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