200x cam on a 185s

[trikeman]

I've heard that a 200x cam will work on a 185s? will it? if it will what other mods need to be done to make it work? has anybody else here done it? And is there a noticible difference? any help is appreciated.
~Rich

[slippy4]

yes, ive heard it works, just have to take the 185 out and throw in the 200x.

[wizzard]

it will work with nothing else needed. i don't know how much improvement you will see though.............

[wizzard]

in fact, i'm just nw thinking of an article I read in a 3 wheelin magazine around 1986. they put a 200x cam in a 200s. i guess the cam would make some difference, but without the complete combination of parts, (flat top piston, header etc.) the improvement would br minimal. if that's all your going to change, try to find a torque grind cam.

[Jason T]

I was told that the only differeces betwwen the 185/200s engine and the 200x engines are: a flat top piston for more compression, a bigger carb and stronger valve springs, I think the cams are the same.
I expect someone will correct me now :D
Jason

[jeswinehart]

you get a little more lift with the x cam. if you had 1 from each machine laying beside each other , with out a micromiter ,,, you would never know wich one is wich. i had gotten a 200x once with the 185 upper on it.

[trikeman]

ok thanks guys

[NOS_350X]

the 185 has a decompression lever on the top. so if your making a extremely high compression engine then i have seen many people use the 185 heads because of the decompression lever

[trikeman]

are there any other cams that would fit in that would cause a noticible power gain?

[wizzard]

Buy a 83-85 200x high perf. cam and you should be covered. Also I think the valve springs were the same in all these bikes but buy high perf valve springs if they ask what bike it's for tell them 83-85 200x.

[trikeman]

yea that would probably work

[1985 200s]

Also the 200X has a longer stroke which gives it a bit more cc's. I was curious about the same thing and when I checked at wiseco.com I found that they are different part numbers for a 12:1 piston. I'm not sure if it (the piston) is different or not. I've been told there the same.

[wizzard]

"Also the 200X has a longer stroke "
hate to have to correct you here 1985 200S but all 185's and 200's had the same stroke of 57.8 mm. check the home page/right side column/ specifications.

[1985 200s]

I stand semi corrected. You are correct on 57.8 I didn't know that. I was going by wiseco. I looked at the specs on here and see they all have 57.8mm stroke except the 1986 & 1987 200X which has a 60mm stroke. Which also increased it's cc's to 199 as opposed to 192. Rod

[wizzard]

true, those 86 and 87's are different animals and it should be noted that all this talk about interchangeability between 185's and 200x's stop at 1985 models. (at least for the 200X)

[MountainRider]

Back to the original topic: I have used both cams (200x and 185s) in both applications. when I put the 200x cam in my 185s, I had to adjust the valves a little. The back side (opposite the cam lobes) seems to be jut a bit thicker on the 200x cam.

The only real performance difference I noticed was a shift in the power band. I lost some on the low end, and gained some on the high end. It didn't really work well for me, and the type of riding I do most (lots of steep hills at crawling speed). I went back to the 185 cam, and even put a 185 cam in my 200x.

The xr200 and xr200r cams will also fit, and both have different lift and duration than the 200x and 185/200s cams. Using a different cam without the added compression/stroke will pretty much just move your power band around. It won't render more horsepower.

If you constantly run your trike at full throttle, you might want to put the higher lift cam in to move your power/torque range up to the high end. If you need a wide power band for general use, hauling, pulling, etc., then stay with the stock 185/200 cam cause that's what it was designed for. If you're looking for "More" power, then you need to consider overbore and/or higher compression piston.

***Note for 1985200s and Jason T**** I just had my 185s cylinder bored to fit a stock 200x piston, and they had to make 3 cuts of 0.010 to get there. The 185 piston definitely smaller, and the cc difference comes from the bore size AND the stroke.

Darrell

[trikeman]

Thanks for all the info, it's really helping me. keep it comiing if possible!

~Rich