is there any parts you can change off from the bigger can-ams to the 400ho? i know they are different engines but just wanted to know if you could put a bigger cam on the 400ho or anything else. don't want to make this sound stupid i know there two different engines but just wanted to know. i know the 500, 650, and 800 are just different bore x stroke. any help thanks its a new atv but always looking for future mods!

I heard that you can put the stage 2 kit off the 800 on it. Any more things you know and i think gypsy 400 told me you could but can you confirm this to me when you see this post i would appreciate it. Any other mods you can switch or anything opinions needed thanks.

I called Wood racing the other day and I was told that several people are putting 400 cams in the 800's because they are bigger. I am expecting a call from Ron Wood to get the complete scoop on all of the engine modifications possible. Supposedly the Woods racing intake for the 800 will fit the 400? Since they are less than an hour from me,I see some mods in the near future.

wait putting 400 can-am in the 800 that doesen't sound right but i was told you could put the stage 2 kit in well give us the info when you get it! also what could the intake do to the 400ho what would it increase you think?

It's my understanding that the top end of the 400 and 800 are identical. 800 just has two. Which would explain why the stage two kit will work on the 400.

Cams are bigger? How exactly is a cam bigger?

top end what? and two what?

Piston, Cylinder, Head

V-Twin

oh ok so what would all work on it you think? (almost) everything? besides exhaust. so would the pistons, cams, and heads?

needaquad wrote:

oh ok so what would all work on it you think? (almost) everything? besides exhaust. so would the pistons, cams, and heads?

OK I checked the parts lists and compared numbers.

The 400 head assembly, complete (valves, cam etc), is the same part number as the rear head on the 800.
Front head on the 800 is a different part number.

Piston and connecting rod are the same

Cylinders are the same.

When I say the same, I mean the Same BRP part number. Mods intended for the 800 could probably be adapted to the 400. Your call.

Putting a 400 Cam on an 800 would obviously be a waste of time.

The reason the front head is a different casting number is due to the coolant circuit

alright thanks

Talk to these guys. Wood Racing Apparently the Rotax Guru.

i have. the one guy that i talked to doesen't really know so he will contact me back in a couple days. if anyone can help me to see what parts i should put on to gain power i would appreciate it. trying to gain power.

Bigger cam = higher lift and more duration. I do believe both engines are SOHC. The 400 cam might just be bigger. Later! Frank

dmax02 wrote:

Bigger cam = higher lift and more duration. I do believe both engines are SOHC. The 400 cam might just be bigger. Later! Frank

This is not always true. You can have 2 completely different cams and the one with more lift and duration could actually make less power. This is due to the fact that the actual profile of the lobes (ramp rates) mean more in regards to making power than lift and duration. Also, lift and duration can be changed independently to achieve the same thing (i.e 4x1=4, and 2x2=4, either way the end result is the same), meaning less lift with a ton of duration will produce similar results to a high lift cam with less duration assuming their respective profiles are the same. Displacement is King in making TQ and HP. So with a small displacement engine, a more aggressive cam will likely be needed to achieve desired HP and TQ outputs. The actual profiles rather than just lift and duration need to be compared prior to determining whether or not more power could be gained by switching to the 400 cam.

I just gave a simple answer to a simple question. Later! Frank