KX Riders

Maintenance & Technical => KX500 Aluminum Frame Conversion (AFC) => Topic started by: kxs in oz on September 22, 2009, 09:56:03 AM

Title: KX250 AF finished
Post by: kxs in oz on September 22, 2009, 09:56:03 AM

Just finished the KX250 AF heres a couple of pics will ride this weekend see how it handles 2009 kx250f  frame 03 kx250 motor as this is the best to bigbore got 310cc pistons coming ohlins suspension excel wheels

Title: Re: KX250 AF finished
Post by: Danger4u2 on September 22, 2009, 10:17:11 AM

Looks new, nice work.

Title: Re: KX250 AF finished
Post by: DoldGuy on September 22, 2009, 10:21:51 AM

I like! :-D

Title: Re: KX250 AF finished
Post by: BDI on September 22, 2009, 10:40:04 AM

Very SexAAAAA!  8-)

Title: Re: KX250 AF finished
Post by: jfabmotorsports.com on September 22, 2009, 02:44:37 PM

SWEEEEET :-D

Title: Re: KX250 AF finished
Post by: don46 on September 22, 2009, 02:58:04 PM

I hope you have better success with your big bore than I had with mine. Mines a 06 and it never made it more than 10 minutes. the builder finally gave up, the transfers are to close together and when you bore it that big they get closer, it kept hooking a ring and tearing up the cylinder and head. The 03 is more like the 99-02 that is a pretty common 310 big bore.

Like the bike, got the parts to build me one, maybe this winter.

Title: Re: KX250 AF finished
Post by: kxs in oz on September 22, 2009, 03:50:03 PM

Yer i looked at using 05 / 07 motor but when i found out they are oring head gasket and the port were so close i got a 03 motor that the bigbore pistons were made for so i would have no problems with what you have had

Title: Re: KX250 AF finished
Post by: cigar on October 02, 2009, 01:28:19 PM

The 2 stroke transplant makes the bike look so trick. One of the nicest dirt bikes I've seen. Good job man..

Title: Re: KX250 AF finished
Post by: kx.man on October 24, 2009, 09:37:15 AM

nice bike, did you do your conversion yourself or did you have someone do ot for you?

Title: Re: KX250 AF finished
Post by: kx10013 on October 24, 2009, 02:24:50 PM

That is one sweet bike man.  :mrgreen:

Title: Re: KX250 AF finished
Post by: kxs in oz on November 06, 2009, 03:44:37 PM

Quote from: kx.man on October 24, 2009, 09:37:15 AM

nice bike, did you do your conversion yourself or did you have someone do ot for you?

The conversion i did myself i dont like to have things done when i have no control or input into the work that needs to be done like on a conversion when you are cutting and rewelding i am now rebuilding the motor at the same time bigboring it to 285 as i was told the 310 will not rev out as well and can vibrate some will let you know how it goes

Title: Re: KX250 AF finished
Post by: Watson777 on December 04, 2009, 11:21:32 AM

That is a SWEET looking bike! Most everything I have seen on this site so far is awesome. Everyone does great work! I am just getting parts and things together to do a KX250AF conversion. I have done a little research and found a few how to guides but nothing that is really detailed and most articles are for the 500AF. Do you have to cut and re-weld the front of the cradle on the 250F chassis to fit the 250 motor like you do to fit the 500 motor in the 450 chassis? Also if anyone knows of a 250F rolling chassis for a decent price I'd like to know about it! Thanks!

Title: Re: KX250 AF finished
Post by: kxs in oz on December 05, 2009, 09:40:44 PM

Yes you will need to cut and raise the Y spar section and make engine mounts to suit if you have a tig and can weld good you wont find it to hard to do