Big Bore 450R!!!
#1
Big Bore 450R!!!
The CRF has room for a 3mm overbore (480cc)
The 450R has a 2.7mm longer stroke than the CRF450!!!
It also has a 2mm smaller bore though!!!
So, that's 5mm to play with if I'm right and Honda used the same cylinder.
Put in the CRF 3mm overbore piston and tada your over 480cc (what the exact number is I'm unsure?)
now cause you started with a 2.7mm longer stroke.
The 450R has a 2.7mm longer stroke than the CRF450!!!
It also has a 2mm smaller bore though!!!
So, that's 5mm to play with if I'm right and Honda used the same cylinder.
Put in the CRF 3mm overbore piston and tada your over 480cc (what the exact number is I'm unsure?)
now cause you started with a 2.7mm longer stroke.
#3
Big Bore 450R!!!
If you are right and you can actually take the cylinder out 5mm, then by simply boring to the largest bore will give you a 500cc quad (498.55cc). The formula is (R devided by 2) to the second power x pie x stroke.
R= Radius (bore)
Pie= 3.14
Cut the bore in half (9.9), this gives you 4.95 centimeters-- times that by itself, gives you 24.5025-- multiply by 3.14, gives you 76.93785-- multiply by the stroke which is 6.48 centimeters and you get 498.55726cc's.
JP
R= Radius (bore)
Pie= 3.14
Cut the bore in half (9.9), this gives you 4.95 centimeters-- times that by itself, gives you 24.5025-- multiply by 3.14, gives you 76.93785-- multiply by the stroke which is 6.48 centimeters and you get 498.55726cc's.
JP
#5
Big Bore 450R!!!
Pleasure4qt, I looked at your picture page and I noticed you have the FST oil cooler. This upgrade is the bomb isn't it. I recently bought back my old 426 and after riding a liquid cooled quad for so long, the hot engine really bugs me so I'm concidering the oil cooler too. My best friend had one on his 440 and it worked GREAT! I might see if I can get an auto transmission cooler to work instead. It would be bigger and cheaper. Not enough people even know about the FST cooler, and most would be too scared to install one since you need to tapp into the head and all. Nice rides.
JP
JP
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