UPDATED!!!!! 200X Build Up & Reassembly With Pics

[MPNX2]

As many of you may know I have an all stock (except for a Cobra pipe) '83 200X that I am looking to modifiy. As of now I am going to go with getting the head ported & polished (I have a spare coming), I am going to be running a crab off an '83 XR200 (I think it is 27mm vice the 24mm stock size), next I will be going with the midrange cam or the race cam I have not made up my mind and would like to know what the differences are among them in trems of performance that is available from powroll. I have not yet decided if I want to use Powrolls big bore 198cc kit or not it doesnt seem like that would offer much more performance (its only 6 cc's over stock). But on the other hand they do offer an 198cc kit that raises the compression to 12:1 would that be an improvement and what would I have to change to accomadate this raise in compression?

Please let me know what you guys think of this setup and if it would offer an increase in performance over the stock engine. I am looking to boost the accelartion of the machine and possibly the top speed. I do mainly trail riding and maybe some dune riding like twice a year.

Thanks for all the advice guys....

[NOS_350X]

ya it will help. it will help alot. i have see 200x's that are built keep up with stock 350x's

[Kilborg]

Been the 200x route myself, actually raced one for a few years and did pretty well about 5-6 years back. How far do you want to go? The 200x has limits, but if you have the money they can easily be stomped. The motor, however, is only good for so much power before the main internals outright fail. If you could get some very fancy and beefy new parts assembled, you could theoretically take a 200x motor and make it run around 20,000 rpm with a ton of boost and those badass internal parts. Theoretically as in fuel management problems you will run into. If you pretty much go the standard, non millionaire route you can still crank about 20hp at the tires. Some "mild" head work, get the airflow going (remember...an engine is only an airpump), put a good cam, big valves, etc...you can do alot with the little 200x. Dual plug heads? 30hp ;)

[MPNX2]

What kind of changes would need to be made to account for the higher compression if I went that route? Would I have to run high octane fuels???

[thefox]

I put a 12:1 compresion weisco piston is my 200s. It gets more power even though it is still on the stock bore. When I got the piston it said that it needed 102 octain or better gas. Seeing how I don't need the extra power I would have just got the 10.25:1 compression piston instead so I could use pump gas had I known.

-Andrew

[Factory fx]

throw some 18' turf tamers on it when youre done with the mods ;)

[wizzard]

i'd stay away from compression that high.
Get the stroker kit from powroll, it will raise your displacement more than the bore kit.
the 18" turf tamers are a good idea, just remember to re sprocket your bike. I suggest a 14 tooth front and 36 tooth rear sprocket.
with the stroker kit, you may be able to run a smaller rear sprocket.

[MPNX2]

throw some 18' turf tamers on it when youre done with the mods ;)

What exactly would that do???

[TRI-Zbrian]

being they are smaller tires the engine will be able to wind out alot faster also the bigger the tire the more it bogs your engine down and when you only have 200cc your better off with a small tire like 18 inch when i had my 84 200x i threw a set of 18 inch tires on it and i noticed it was alot more snappy then when i had 22 inch tires on it i think 18 inch tires would be a good buy.

[MPNX2]

Oh I see.... Thanks for the info but I think I will be better off doing the engine mods. THat way I can still run paddles in the sand...

[Crash104936221]

hey whats the diferances between the 200x heads and the 200 head?
the 200 is rated for 7.8:1 comp
the 200x's rated for 9.2:1 comp are they interchangeable? would the extra 1.4 be worth the bother?

[TRI-Zbrian]

yes the two heads will bolt up to eather engine my buddyand i did this to bring a 200s of his back to life.

[wizzard]

no difference at all, the 200X came with a flat top piston the S had a dish piston

[200Xtreme]

Yep, the heads are the same, but the X has a hotter camshaft. Therefore, if you install the X head (with cam) you will see an improvement.

[Tri-Z Pilot]

If you use 18 inch tires you will gain accelleration, but you will lose some top end. If you do woods riding I would go with 20 inch tires (the 18 inch will make the trailprotrailprotrailprotrailprotrailpro end lower, and you will be hitting a lot more debris). Now for your cam choice, go with a good all around cam, a mild one would probably be best since you are a woods rider. The race cam is more of a top end cam, and you will wish you had the bottom end power for the woods.

[MPNX2]

Well it has begun!!! Last night I took the motor out (see pics). The new head is on the way the one that will be ported and polished ($5.00 on Ebay). New 27mm carb is on the way as well. I am still debating on which cam to use and if I should go with either the big bore or stroker kit from powroll. I know for sure I am going to get a new cam but I am still a little skeptical about either the big bore or stroker kit. I like the reliabilty. Anyways here are some pics also please excuse any stupid questions that may come over the following weeks. Also, any comments or helpful hints are welcomed... If interested I will keep updated this thread with updates..

[86250RZ]

I know back in the day (mid 80's) you could not find any bigbore kits for the 200X I was told the motor was already punched out about as far as you could go so I had the head ported and polished and a mid to top end cam up grade with wiseco piston and Basanni pipe I also went with a 185s low end, the only problem w/ the low end was it was a pull crank but it made one heck of a diff. in low range. I know some of you guys will not believe this but my dad bought a brand new 350X and in a drag race I would smoke his 350X but when we found a long strip to run down like a 8th mile or so he wold catch me in sixth gear. Boy I miss that 84 200X, wish I new were it was today! :(

[MPNX2]

Yeah I have heard the same thing about Honda just boring out the CB100 motor and that was where the 200X motor came from. The biggest kit available is only 204cc's. But they also have a "stroker" kit but I have know idea what the advantage of that is?? I will probably get the midrange cam. Since I do mainly trail/dune riding. Stay tuned... more pics will be coming.....

[MPNX2]

Are the skidplates powdercoated like the frame or are they just sprayed?

[wizzard]

the stroker kit increases the stroke of you crank which increases displacement (to around 210 cc if i'm not mistaken) which increases the torque you engine puts out. it's a big advantage !
the 200x head will not make a difference, you could install the cam and piston and keep the S head and it would be the same.

[MPNX2]

What kind of changes must be done to the engine to accomadate the longer stroke??? (i.e. do I have to bore the cylinder?)

[slippy4]

boring has nothing to do with the stroke, if anything youd have to get a longer cylinder, not bigger

[Trikeaholic]

www.powroll.com

big bore kit for pre 86 200x

cant remember how big you can go, but its more than 204cc, I can tell you that.

[MPNX2]

www.powroll.com

big bore kit for pre 86 200x

cant remember how big you can go, but its more than 204cc, I can tell you that.


Powroll also has the storker kit would that be a better choice over the big bore kit??? What are the advantages of both???

The biggest I have seen is 198cc's on Powroll's website.. here is the link:
http://www.powroll.com/honda_other%20atvs.htm

[MPNX2]

I am a little indecisive about which cam to buy. As of now I am going to get the head ported and polished, run a 26mm carb, an XR200 intake, also I will be going with a Wiesco piston kit which will raise the compression to 10.25:1 and rasie the displacment to 201cc's, the web cam I think I am going to be using is used for good midrange and top end power and gives .362 lift and 270 duration, also I will be running high performace valve springs. Powroll does seem pretty expensive and I have decided not to go with a stroker kit due to the cost and I dont want to send them my parts.

Hopefully this is a good combo to be running because I hope to only have to motor aprat once.

I will add pics later today as well...

[MPNX2]

Well here are a few current pics....I am still accpecting any suggestions if anyone has any..

[MPNX2]

A few more....

[MPNX2]

Missed one....

[MPNX2]

A few more..

[MPNX2]

more...

[PLJ.]

Where did you buy your new 27mm carb from??

[MPNX2]

I havent bought one yet. I am still looking for one..

[MPNX2]

UPDATE......

I have taken the cylinder head, and cylinder to the machine shop for it to get ported, polished, and bored. The machine shop will also be ordering my valve spring kit as well as the cam it seems that they are an authorized Webcam dealer. I am hoping that they will also put the new springs and the new retainers in for me that will make the assembly go a lot quicker. I cant wait to see the difference.


Oh....Does anyone have any break in tips..??

[ATCRYDER]

A few more weeks and you'll be seeing the most tricked out 87 200X to date. ;) 250R Suspension + Fully Modified Engine.

[MPNX2]

I am going to pickup the cylinder, new cam and springs, and cylinder head tonight. I am quite excited to get it back together.. Does anyone have any tips to use on putting it all back together so I dont have any problems afterwards? I have heard that I should soak the piston and rings in oil before installing them is this true any other tips to make sure I dont seize the cam bearings on intail startup ???

[motoman1012002]

Yeah get some hondbond gasket sealer

[speed20]

dont go over 1/3 throttle for about 3-4 tankfulls (the manual says 150 hours....but i find that a little to much!)....change the oil after your first ride, thats when you start seeing aluminum or metal shavings from the break in....good luck!

[MPNX2]

Thanks I will be sure and do that. I am waiting on a headgasket because the one that came in my gasket set was not stamped correctly. After that comes in it shouldnt take too long to reassemble it. I cant wait.

[speed20]

did the one that was stamped right come from vesrah by any chance??? i get the aftermarket ones...they are just like 3 pieces of copper or something pop rivited together....dont have to worry about it blowing...and does away with every dowel pin except one! cant beat it for only 15 bucks

[MPNX2]

The gasket that was stamped wrong came from Versah. I am going to get a Honda factory gasket I figure that is the best way to go. Have you had the same problem?