New to the board
Arm chair racerNew to the board
just brainstorming, but does an 84 xr 200r have a 4 valve head and could i just swap that out on my 84 200x bottom end i was planning to put a 10.25:1 wiseco in anyway? i think the neighbors got a junk xr200r behind the barn, maybe ill pick it up cheap.
1976 XL100
1978 Z50
1980 NC 50 Express
1983 ATC 185S (staightpiped)
1984 ATC 200X
1985 ATC 250ES
1985 ATC 350X
1986 ATC 250ES
1986 ATC 250SX
Kindergarden Speller
4 Wheels? Huh?
do a search on here .. there use to be a tread on that a year or so ago .. great info from the old threads ..
down to parts because i no longer have a place to ride trikes.
GIT IT RAAAGGGGG !!!!
New to the board
Arm chair racerNew to the board
maybe i will tommorow. i here you can swich the cams but the header had two ports and i thought that looked like it was a 4 valve head, thought it might breathe a little better
1976 XL100
1978 Z50
1980 NC 50 Express
1983 ATC 185S (staightpiped)
1984 ATC 200X
1985 ATC 250ES
1985 ATC 350X
1986 ATC 250ES
1986 ATC 250SX
Kindergarden Speller
4 Wheels? Huh?
yea you can use a xr200 cam and i herd they have a higher lift than the stock 200 cams .. i think the xr200r heads are 2 valves but they are bigger valves than a normal 200 head . not too sure though because i dont know dirt bikes too well .
down to parts because i no longer have a place to ride trikes.
GIT IT RAAAGGGGG !!!!
Roostin' Away
Arm chair racerRoostin Away
I believe the 84 and 85 XR200R models had 4 valves, dual carbs, dual header pipes. They were based on the larger 250 and 350 motors.
The exception is the 84 XR200 model, this is the only funny year, where the 'R' after the '200' mean dual/mono rear shock, and I believe the 84 monoshock had a 'regular' xr200 (1981-83, and 1986-2002) head with two valves and one header. (84 had one with that funky motor, and one model with the more traditional setup)
Not sure if that 84/85 head will fit, but the regular ones should no problem. Only difference is supposedly a better cam and the 65mm vs 65.5mm stock piston size difference...and supposedly the XR has smaller jugs/fins.
Got The Holeshot
Arm chair racerJust too addicted
The 4 valve XR heads won't fit the 200X, S etc. Those heads were junk anyway. They used to crack between the valve seats all the time.
Stick with the stock head and all the 185 - 200cc two valved heads have the same size valves as each other.
New to the board
Arm chair racerNew to the board
so the xr 200 cam will fit right in my head and will give me more power than my stock one? how will that one compare with like a the mid range powroll cam or the webcam?
1976 XL100
1978 Z50
1980 NC 50 Express
1983 ATC 185S (staightpiped)
1984 ATC 200X
1985 ATC 250ES
1985 ATC 350X
1986 ATC 250ES
1986 ATC 250SX
Power User
Catch me if you can
Cams from some XR's - YES.
Head - No.
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country
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