Originally Posted by doyle
So I know a guy....
asked me to inquire the minds about either A) putting a carb'd (pre-2009) CRF450R motor in his Team Honda Europe 450X rally bike or B) Adapting the tanks, nav, etc.. from the CRF450X onto a CRF450R.
Anyone familiar enough with the specifics of the motors?
Some drawbacks of the R for rally would be the closer gearing, perhaps too close for the long hours and longer liaisons? Also as far as I know, there is no electric start on the R's, correct? The R is also a higher compression, could lead to detonation problems at altitude and heat, perhaps?
His major mechanical problems in Dakar were mostly stator related. He had a few let him down and is looking from some assurances from Team Honda Europe that they can correct the problem but Chavo is looking to flush out some ideas and asked me to gather the wisdom of the collective. I pondered putting this in Thumpers, but the intent is more rally related so I wanted to keep that perspective on the overall discussion.
You need to r ify the x motor. I spent $5000 doing that.
Change the head, carb and valves over to r model parts. Radiators. Porting. Open the air box.
You need to keep the x base.
Switch the r model swing arm in too.
Why was the yzf so good - presumably it's gearbox is very tight like the CRF r model? They did fantastic in Dakar 2013.