kx250 with k5 motor how to do it directions PLEASE help

[mar67655]

Ive only been on this site a week and the help ive gotten is awesome .I have a 98 k5 wright now its all dissasembled to bare frame .Ive been reading alot about engine swaps i have had a couple cr250s & 2004 and 05 crf 450 but nothing compares to that k5 power Im thinking of doing a engine swap into a 99 thru 02 kx250 they are pretty cheap to come buy .I would like an aluminum frame conversion but thats not in my budget wright now.If somebody on here has some step buy step dirrections of how to do it and what all need that would be much appreciated .WHAT YEAR KX 250 WOULD YOU RECOMMEND iknow to stay away from the 03 appreciate any help Im going to try and attemp this

[jfabmotorsports.com]

I just bought an '07 kx450 with low hours for $2800 on ebay. The engines are going for $1600 to $2000. That leaves me with an $800 to $1200 rolling chassis. How cheap can you buy a KX250?  JFAB

[mar67655]

thats avery good point i was thinking the same i know i can get a 2000 kx 250 in good shape some aftermarket parts no joke found acouple i guess because of the economy for 1000 to 800 i was thinking motor on the cheap side on ebay worth 400 to 500 .Mythinking was the fabrication involved in either build i cant weld so i have to farm that out .I know the best is to do what you have done with the kx450 .I guess im trying to be the cheapest i can .I read how you did your its sounds a little scary to jump into but i know its possible appreciate any other advice you might have thank you

[mar67655]

I can buy an 06 rmz 450 complete rolling chassis minus motor in like new shape for 1200 have you heard anybody using that set up

[jfabmotorsports.com]

Rmz..I think I saw a thread on here with one, maybe. On the other hand, your approach with the steel frame may be the best for you if you are going to farm the work out. It is a lot easier to find someone that can do a good job welding steel than aluminum. The lake mod 250's a very lite and nimble machine.

[mar67655]

I just talked to a guy today i can pick up a 2002 kx 250 for 800.00 have you ever done a steel frame conversion yourself like i said before i have a complete 98 kx 500 so i should have enough for parts just trying to figure were to start after i buy a bike although i do no somebody that can weld aluminum he"s the same guy who is going to do the fab on the steel frame .How about the swing arm bolt needs to be enlarged so the cases should be split ?thank again for your help

[sintax]

I'd honestly just do some searching 95% of the info is out there. Read posts by BDI and Don, they are the two sources i got all of my info from. Both guys offer a ton of info from both ends of the spectrum.

BDI has a custom headstay mount for the engine that looks amazing, price was a lil rich for my blood, but would really have cleaned the looks up quite a bit, and for someone without any fab skills, would certainly be worth it.

My 250/500 hybrid is kinda different then anyone elses i've seen. Mine is a true hybrid "parts" bike, in the sense that I did not start with a full KX250. It would have been MUCH cheaper to just start with the full KX250...