Dong Fang DF 250 RTB Bobber Information

[Bobthebobber]

there it is , a chrome forward facing air intake (poor mans air ram) , air ram only works if filters an open top like stock filter , mine used a radiator hose Attachment 12885

This is a sink pipe or a radiator hose? Where did you get the rubber couplings to mount the pipe to the carb?

[DanDaMan]

that's a radiator hose , and it bolted directly to carb/filter with the existing clamps (just measured carb throat n got hose same size)

this is sink pipe , looks like he used radiator hose to attach it to carb

[barnone]

Good PDF from CCW
https://docs.google.com/file/d/0ByFv.../edit?hl=en_US

General topic on valve adjusting is here.
http://www.mychinamoto.com/forums/showthread.php?376-QingQi-%28Qlink%29-200GY-Illustrated-Valve-Adjustment&highlight=adjusting+valves

Video for Heist valve adjustment which has almost the same engine as the DF .
http://www.youtube.com/watch?v=mbJPIQQDsSM

Also look at videos for CG Honda 125 valve adjustment.

[Bobthebobber]

Good PDF from CCW
https://docs.google.com/file/d/0ByFv.../edit?hl=en_US

General topic on valve adjusting is here.
http://www.mychinamoto.com/forums/showthread.php?376-QingQi-%28Qlink%29-200GY-Illustrated-Valve-Adjustment&highlight=adjusting+valves

Video for Heist valve adjustment which has almost the same engine as the DF .
http://www.youtube.com/watch?v=mbJPIQQDsSM

Also look at videos for CG Honda 125 valve adjustment.

Thanks for the links! What did you set your valves at? Do you think that could be part of the problem? Take a look one page back and tell me what you think of the plugs. Thank Barnone

[barnone]

Thanks for the links! What did you set your valves at? Do you think that could be part of the problem? Take a look one page back and tell me what you think of the plugs. Thank Barnone

From my ex 2010 bike "Manual and sticker on frame both say .06mm intake and .08mm exhaust."
http://www.mychinamoto.com/forums/sh...rmation/page13
Better a little loose than too tight.


You need to check your valves ASAP. You can have engine damage if they are tight like mine were.
I had no clearance on mine when I uncrated the bike. Others here have also reported the same lack of clearance on their 2012s. You will suffer power loss if the valves don't close.

Plug looks like you are running too lean to me. I need to check mine as I went up to 108 main jet from my stock 105.

But adjust your valves before you ride any more. Get an experienced friend or independent shop to help you.

[Pushrod]

Got my _b yesterday. Wrote up a long post about it but the site wouldn't let me submit it. Made me log out then log back in. Of course the post was gone. I'm not rewriting it. I don't know if this will post or not. Anyway, the short version: nice bike, I like it. Thanks for all the info. Adios.

[barnone]

Pushrod,
Living up to your handle with the addition of another push rod motor. Nice and simple which is nice.
Photos when you get the chance, please.

[Gearhead45]

My bike finally came in. I love the look of it. I've gotten most of it setup, can't wait to finish and take it for the test spin!

[axa]

that's a radiator hose , and it bolted directly to carb/filter with the existing clamps (just measured carb throat n got hose same size)

this is sink pipe , looks like he used radiator hose to attach it to carb

Dan, does redirecting the intake honestly help and produce any noticeable increase in power?
i like most of us quickly find this these engines way underpowered and want to do whatever within reason to help it out, but im skeptical about this.
I mean, if this really is effective, why not make a wide mouth funnel shaped intake to do this adequately?

[SR.MAILMAN]

triumph-bsa-amal-930-carb-intake-velocity-stack-long-unit-bobber-chopper-650