300ex cam Q

[2004exrider]

hey, i was wondering if a stock 400ex cam would fit in a 300ex, there both 4 valve engines right???:confused:

[stonerider250x]

the cams are not interchangeable because the 400ex has dual cams which means one for intake and one for exhaust. im pretty sure im right but if im not some one correct me im dont know much bout the 400ex

[44oEX]

ehh no and the 400ex only have one cam.

the 400 one is alot longer then the 300's

[Trevor]

The 400 only has i cam but it is longer and ham more lobes on it because of the extra valves in the 400

[44oEX]

the 400 doesn't have extra valves, they are both 4 valve engines.

[Trevor]

I didn't think that the 300s had 2 exhaust valves because it only has 1 exhaust pipe...

[44oEX]

yeah i does it's like a 2 in 1. it's like the 450's they have 4 vavles and just on pipe. the only thing with just 2 valves is the warrior

[Trevor]

Oh so there ported together in the head?

[Trevor]

2 into 1

[44oEX]

well it just like the intake. it goes from one hole ( carb ) to 2 hole ( 2 valves ) well it does the same on the exhaust, 2 valves that go in to 1 hole for the exhaust.

[Trevor]

Than what is the advantage of a twin cam motor over this design if they both have 4 valves?

[2004exrider]

alrite, thanx for answering.:D

[44oEX]

Originally posted by Trevor
Than what is the advantage of a twin cam motor over this design if they both have 4 valves?

well the cams ride direcly on top of the valves, there are no rockers arms, so the spec can be tighter, so the motor cam rev faster.