Best chassis for CR500af build?

Joko
Profile picture for user Joko
Posts
1431
Joined
1/2/2011
Location
Cromwell, CT US
Fantasy
233rd
Joko
Edited Date/Time 1/19/2019 6:43am
I have a 2008 CRF450 I’m considering converting to a CR500AF build. Is this model chassis better than any other year Honda platform, I.e. 02-07 CR250? I’ve heard the CRF450 has the same geometry as the steel frame 89-01 CR500’s. Concerned with stability and too short of a wheelbase to work correctly. Any swing arm lengthening worthwhile? Ill be riding on mostly sand tracks incl. Southwick and am targeting straight line stability but would like good turn in for some of the tight 180’s. Also would like to try out the ESR Cr500 cylinder coming out with the powervalve, maybe add the STIC carb mod. Also have a few KX500 engines to use, but not sure if that’ll convert into the CRF frame. Anyone interested in the CRF450 engine? Has TMR ported head, 13.5.1 piston, stage 2 Hotcam, barnett clutch, carb mods, all new valvetrain, .2 hrs.
1
|
sandman768
Profile picture for user sandman768
Posts
6071
Joined
3/21/2014
Location
Saratoga Springs, NY US
sandman768 1/18/2019 6:01pm
1/18/2019 6:01pm
I would leave that 2008 crf450 just as it is...pick up a blown up crf250 and do the conversion...should be easy to find...
1
trav389
Profile picture for user trav389
Posts
79
Joined
1/20/2018
Location
AU
trav389 1/19/2019 12:25am
1/19/2019 12:25am
The best chassis for a CR 500 motor is the one Honda shoved it in at the factory. Steelies for the W
8
1
Polishhammer 1/19/2019 6:43am
1/19/2019 6:43am
I parted out a 09 CRF450R and put in a CR500 engine. It wasn’t very difficult. I used a cp500 conversion kit. Worked well. It’s almost completed. Just need to put suspension in and plastics. Here’s some pix from awhile ago.
That bike u have looks too good to do that to. I would pick up a blown 4stroke to use if I were u.

2
PTshox
Profile picture for user PTshox
Posts
1350
Joined
10/1/2011
Location
Highland Village, TX US
PTshox 1/24/2019 2:05pm
1/24/2019 2:05pm
There seems to be a difference between the CRx50R chassis and the X chassis. I don't know the exact difference, but the the X chassis seem to handle better. Sounds crazy... but it's true. Get a X frame off ebay if you find a R that has a blown motor.

The Shop

See All »
rjg
Profile picture for user rjg
Posts
433
Joined
9/27/2016
Location
CA
rjg 1/25/2019 2:19pm
1/25/2019 2:19pm
Just speculation but maybe the "X" chassis has a slight rigidity difference making a little more flexible.

Post a reply to: Best chassis for CR500af build?