Laeger aluminum framed crf 450

[Houser450]

ok guys my buddy has a aluminum framed laeger/lrd 250r sitting in my garage has anyone ever put a crf in these frames i think it would be a sweet flat tracker just curious any ideas or info would be great.
thanks
Lee

[416exmx]

I was going to do it a few years ago and called LRD about it. They said they had faith in their welds holding up but the aluminum tubing itsself would start cracking bad. He said the frames were made specificaly for show and dunes. He didnt recommend mx'ing with them. You might be ok flat trackin with one. It would still be a sweet quad none the less.

[cbr]

i'd like to see that! that would be bad a** with a crf or ktm510 motor for flat track. post pics if you decide to go with it.

[Houser450]

how hard are the ktm motors to put into a r chassis usually anybody know?

[monstergt88]

my friend did. He had a crf 450 engine in his 250r frame. It was a lot of work. I think the people over at east coast atv did the mods for him.

[Houser450]

does anyone think that i will have issues with the height of the frame since the 250r motor is a lot shorter than the crf? does anyone have dimensions on the motors

[Houser450]

knowbody has any ideas or info?

[duneflyer1]

Just couldnt stay away from the hybrid could you....:D


Might as well give it a shot, but I am sure you will have to move lots of stuff

[400exrider707]

It is generally a lot harder to put a four stroke motor into a frame designed for a two stroke because of the height like you said.

[racernorris]

the problem with putting a four stroke in place of a two stroke motor is the piviot bolt location is to low in a two stroke frame, your front sprocket should line up with the swing arm, in order to do this in a two stroke frame you have to cut out the bottom frame rails and lower the motor down in the frame, after you reattach the frame rails (that are now 1/2 to 3/4 inch lower), then you have to customize the rear shock to keep the frame from hitting the ground = less wheel travel !

racernorrs

[ss440ex]

Racernorris...ck your messages!!!

[rustyATV]

Originally posted by 416exmx
He said the frames were made specificaly for show and dunes. He didnt recommend mx'ing with them.

Did he bother to mention that to Jeremiah Jones when he raced one?

[matt250r21]

I heard Jones had a new aluminum frame for almost every race because of the fear of breaking it. Also, I know a slow guy in Distric 7 who broke one in half on an mx track. Heard the stock style foot peg mounts have issues too. Very cool frame though dont get me wrong, but if an R motor could rip it up, look out with a thumper in it. Almost sure the CRF wouldn't fit that frame correctly anyways.

[1fst400]

lets see a pic of this frame, im currious.

[Houser450]

Im just wondering if the frame would hold up to flat track ice racing not mx or cross country, and ill have to get some pictures to see what you guys think about fitting the motor in their. man i wish someone tried it already so i knew

[rustyATV]

I wouldn't put money on it. Aluminum doesn't have a fatigue limit, or a point at which it stops losing strength due to repeated loading. Theoretically that means is even if you overbuild it, it's eventually going to break. Depends on how overbuilt it is, though.

In my opinion, suspicion should be cast on anything that duplicates a steel design with simply swapping materials, and doesn't try to take advantage of the benefits of using the other material and/or ignores the shortcomings.