Trx450r chassis with 250r engine?
Page 1 of 8 123 ... LastLast
Results 1 to 10 of 71
Like Tree4Likes

Thread: Trx450r chassis with 250r engine?

  1. #1
    Senior Member 250rfx4's Avatar
    Join Date
    Sep 2013
    Posts
    444

    Trx450r chassis with 250r engine?

    How difficult is this swap? I have a 2005 trx450r that is a nice rolling chassis but the engine has been torn down by myself to be redone. Now I'm considering fixing the engine and selling it to buy a 250r set up for it. It doesn't look like it would be complicated but I'd like some input by anyone who did it. I also considered just selling the 450r frame and using everything else off of it on a 250r chassis

  2. #2
    Senior Member Langbolt's Avatar
    Join Date
    Feb 2010
    Location
    Ontario, CANADA
    Posts
    609
    I'm working on this same project.

    Using the stock 450R frame won't work as is.....the Swing arm mount needs to be lowered and the tube that supports the Upper shock mount needs to be re-designed.

    Here's some pics.... The last pic is one I found of a successful swap....it looks great!
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	450R frame_side_2.JPG 
Views:	291 
Size:	160.8 KB 
ID:	29601   Click image for larger version. 

Name:	450R frame_rear_2.JPG 
Views:	260 
Size:	103.1 KB 
ID:	29602   Click image for larger version. 

Name:	3.jpg 
Views:	322 
Size:	156.9 KB 
ID:	29603  

  3. #3
    Senior Member Langbolt's Avatar
    Join Date
    Feb 2010
    Location
    Ontario, CANADA
    Posts
    609
    Jerry @ White Chassis came up with this solution for the CRF250 in a TRX450 Chassis.....I think it could also be applied for the 250R
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	crf250 in a 450R.jpg 
Views:	259 
Size:	116.5 KB 
ID:	29604  

  4. #4
    Senior Member 250rfx4's Avatar
    Join Date
    Sep 2013
    Posts
    444
    Thanks y'all! I'm going to look into it some more and see

  5. #5
    j@y
    j@y is offline
    Member j@y's Avatar
    Join Date
    Feb 2010
    Location
    Fayetteville GA
    Posts
    43
    Six 5 designs was working on that set up at one point I believe. They might be able to help

  6. #6
    Senior Member RexRippin's Avatar
    Join Date
    Oct 2012
    Location
    Fargo, nd
    Posts
    420
    La450 did this, but his is a full out drag bike, may want to talk to him

  7. #7
    Senior Member 250rfx4's Avatar
    Join Date
    Sep 2013
    Posts
    444
    Why does the rear shock mount need to be messed with? It wasn't possible to put in a rear motor mount like on an 88/89 250r?

  8. #8
    Senior Member Langbolt's Avatar
    Join Date
    Feb 2010
    Location
    Ontario, CANADA
    Posts
    609
    Have a look at my first pic. If you use the Stock Swing arm bolt location & a motor mount from an '86-87 250R....it lifts the back of the motor and the tube that goes across the frame at the upper shock mount blocks off the intake tube to go from the Carburetor to the air box. It would have been too easy if HONDA made this a BOLT in SWAP

  9. #9
    Senior Member 250rfx4's Avatar
    Join Date
    Sep 2013
    Posts
    444

    Trx450r chassis with 250r engine?

    Ahhh I get what you mean, hmm still doesn't seem too bad to do

  10. #10
    Senior Member 250rfx4's Avatar
    Join Date
    Sep 2013
    Posts
    444
    There was no way to lift the front of the motor a little more to get clearance? I also heard the swap is very easy on a ltr450 as well


 
Page 1 of 8 123 ... LastLast

Remove Ads

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Search tags for this page

250 motox rolling chassis
,
250r engine in 450r
,

250r engine in 450r frame

,
250r in 450r frame
,

250r motor in 450r frame

,
airbox trx 450r with crf 250r motor
,
can take a trx 450 and put a crf 250 engine it the 45
,
crf 250 motor on trx 450r
,
crf 250r motor in trx 450r
,
crf 250r motor in trx450r chassis
,
crf250r motor on trx450r
,
honda trx450r with 250r motor
,
motor mounts for trx 250r on a 450r frame
,
trx 250r in 450r frame exhaust
,
trx 450 with crf 250 engine
Click on a term to search for related topics.