Dong Fang DF 250 RTB Bobber Information

[chruk bashre]

[bowtiewagon]

Have you had any other problems with the bike? I'm still working through this thread. Did you have any gas tank leak? I have seen that they are dropping this model, or, at least changing a few things. This tank seems to be dropped in favor of a Sportster looking peanut tank, and these bars are gone too.

Nothing out of the ordinary, but i did have the same tank issue with the studs leaking. I had the dealer send me a new tank and installed it with small rubber washers and not so tight on the nuts. I used nylon nuts. No leaks since. Everything else has been normal maintanance. I love this bike, and it loves me.

[chruk bashre]

just got back and mine hauls. fast warm up and great low growl with no pop or back . glad to remove the SAIS

[axa]

I feel the hand controls are too far out. How can i know what parts will be a direct replacement? Is there a fit number or something?

[DanDaMan]

IMO , the air deleat does nuthing but remove the popping on decell

and it is a 125 turned into a 250 , but it still breaths like a 125 , if u inhibit the air flow at all , aka a better air cleaner ur gunna slow down

when its 40-50 degree's out itll run to 80 indicated (if geared for it) , at 90-100 it struggles around 70 , because it cant breath well because the warmer airs thinner

hmmmm , intercooler ? nitrous "drizzel" ? turbo charger ? :O

I would bet with enough airflow , it would compeat with most 250's out there speed wise

[axa]

IMO , the air deleat does nuthing but remove the popping on decell

and it is a 125 turned into a 250 , but it still breaths like a 125 , if u inhibit the air flow at all , aka a better air cleaner ur gunna slow down

when its 40-50 degree's out itll run to 80 indicated (if geared for it) , at 90-100 it struggles around 70 , because it cant breath well because the warmer airs thinner

hmmmm , intercooler ? nitrous "drizzel" ? turbo charger ? :O

I would bet with enough airflow , it would compeat with most 250's out there speed wise

so performance wise, whats the consensus on the secondary air injection? scrap it? keep it? or it really doesn't matter much?

[SR.MAILMAN]

so performance wise, whats the consensus on the secondary air injection? scrap it? keep it? or it really doesn't matter much?

Air induction is an emissions thing. Its purpose is to complete the exhaust burn, AFTER the exhaust valve. It raises the exhaust pipe temp and causes a lean (popping on decel) condition.

Removal will do nothing but lighten (less weight) and stop lean popping. Leaving in place will also do nothing for performance (unless it fails re: vacuum leak at carb).

[axa]

Air induction is an emissions thing. Its purpose is to complete the exhaust burn, AFTER the exhaust valve. It raises the exhaust pipe temp and causes a lean (popping on decel) condition.

Removal will do nothing but lighten (less weight) and stop lean popping. Leaving in place will also do nothing for performance (unless it fails re: vacuum leak at carb).

so everyone is taking it off for the sake of vanity eh?
well i might as well keep it and be a good earthling i suppose...

[axa]

I feel the hand levers are way too far out for my liking. How can i know what parts will be a direct replacement? Is there a fit number or something?

bump...
so how do i size new levers?
or are these things universal or something?

[ben2go]

bump...
so how do i size new levers?
or are these things universal or something?

You'll have to find a place that has a lot on hand and try to match something up.