478cc CRF/CRE with a fabulous 18" rear...
Curious, anyone know if this is merely a punched-out CRF450, or what?

What about the 2012 CRe125 2T ?

Heck, I did not even know that Honda-Montesa was "building" anything but the usual trials/dual-p stuff...maybe this is a 'testing ground" for American Honda, anyone know?

http://www.hmmoto.it...am=1&idProd=235

For whatever reason its got a bigger bore. The standard CRF450R engine has a 96mm piston, that one is a 99m.

Its that Italian?

www.servicehonda.com

2012 CR125 CR250 CR500 2 strokes

JJRace, on 03 February 2012 - 09:00 PM, said:

The bike up there that TXkawboy is talking about is a thumper.

too bad we cant get a bike like that over here.

here , build your own .

i prefer the standard bore

http://www.ebay.com/...ssories&vxp=mtr

517 CRF How much HP and torque would that make? Would it still be dependable? Most big bores are lower compression why is that? I am new to four strokes and a lot to learn.

Ron Hamp, on 04 February 2012 - 02:41 PM, said:

The longer rod would suit flat track and road race apps too with the stock bore and strokes.

Who is doing the rod?

Will the 517 cc be High Compression? Or like most big bore kits around 12.5-1.

maybe a ktm rod about .090 longer?

Increasing the rod length is good for hp but it does seem to affect the handling. I have had a few BB kits installed and rode several BB kit bikes (some experimental) and the common trait between them is they felt "heavy". This can be a good thing if you are riding off road and do a lot of high-speed stuff, but turning can be a little more work. This characteristic is obviously a disadvantage on the motocross track.

I recently had one of my bikes punched out to a 490, which was almost the biggest I could go without increasing rod length. i could have increased it to 500cc but would have use an iron cylinder. I kept it at 490 rather than bumping it up to 500 because i wanted similar metals between the piston and cylinder so when I ride it in demanding conditions the expansion rate between them would be about the same and minimize the chance of seizing it. The bike still handles like a motocrosser, but with extra hp, which was my goal.

What I like about the four stroke motors is you can really personalize them to how you ride and the conditions you ride in. There are so many variables and things you can do to them its just like ordering off of a menu. Along those lines the heavy feeling I mentioned before on some of the BB kits I rode can be mitigated with extensive work. But it almost becomes cost prohibitive for the recreational user at that point.

i never regreted kikcing out my 450 motor in favor of a 2 stroke 500 and its really not that mutch work it depends a lot whitch bike you start with

That original site has a 2012 crf300r. I would love to have that.

ah665, on 10 February 2012 - 07:58 AM, said:

why not take your current bike that is allready set up to your liking and add in a BB kit?

How would a 2 stroke 500 compare to 4 stroke 500cc? In a aluminum framed bike.