Dong Fang DF 250 RTB Bobber Information

:popcorn:

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Originally Posted by birdmove

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.

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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.

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

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?

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

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Originally Posted by 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

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

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Originally Posted by axa

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

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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).

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Originally Posted by SR.MAILMAN

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).

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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...

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Originally Posted by 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?

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

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Originally Posted by axa

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

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