How to get top speed out of my 200x

**kjosh1982** · 01-23-2011, 02:45 PM

I bought an 85 200X a few months ago, I am now in the process of restoring it.
I returned everything to factory settings and I was hitting 52-53 for a top speed.
I was wondering if I changed the front/rear sprocket would it make much of a difference? I have found an 11, 12, and 13 tooth front sprocket for sale and as far as rear sprockets I've found a 38,39, and 40 tooth.

Any help would be appreciated.
Thanks Josh

**spoon** · 01-23-2011, 02:49 PM

Larger in the front. Smaller in the back. I have no experience on the 200x but I would imagine it would lose some puddin on the bottom end. Try larger tires on the back too.

**bcredneck** · 01-23-2011, 03:02 PM

2mm bigger carb xr200 head

**ailll1** · 01-23-2011, 03:25 PM

Originally Posted by spoon

Smaller in the front. Larger in the back. I have no experience on the 200x but I would imagine it would lose some puddin on the bottom end. Try larger tires on the back too.

No thats exactly what he doesnt want to do if he wants to gain top speed. Bigger up front and smaller at the back sproket.

**Xpress** · 01-23-2011, 03:40 PM

^Yeah I was about to say. And I wouldn't go over 22" for rear tires on it, since it's more of a sport machine.

**spoon** · 01-23-2011, 03:53 PM

dammit!! ok fixed it.

**fabiodriven** · 01-23-2011, 04:30 PM

Originally Posted by bcredneck

2mm bigger carb xr200 head

That is going to do absolutely nothing for his top speed.

**oscarmayer** · 01-23-2011, 05:17 PM

bigger carb gices more power. more power means more top end.

**Xfile** · 01-23-2011, 05:32 PM

2mm is jack....you need to run a 28/29 (can't remember exact size) from a XR200. you also need to use the early 80's XR200 manifold to match the larger carb size with the 200x head intake passage. I don't think running a xr 200 head is going to do anything for you, I'm pretty sure the compression difference came from a different piston design, not the head itself..

**oscarmayer** · 01-23-2011, 05:40 PM

yea xr200 head is the same specs as 200x. piston is only .5 more than than 200x. your best bet is a wiseco piston, larger cam and 26mm carb from a xr200. (they were 26mm vs 24mm 200x) this is a cheap way. if you want expensive, i can go there too.

**Kfx-xc-racer88** · 01-23-2011, 05:52 PM

You can change the gearing with the sprockets and fit bigger tyres but if you gear it up too far you'll strugle for power, so you'll have to do some mods to make more hp!!

**fabiodriven** · 01-23-2011, 05:52 PM

Originally Posted by oscarmayer

yea xr200 head is the same specs as 200x. piston is only .5 more than than 200x. your best bet is a wiseco piston, larger cam and 26mm carb from a xr200. (they were 26mm vs 24mm 200x) this is a cheap way. if you want expensive, i can go there too.

Top speed Oscar. He hasn't asked a thing about the motor.

**Xfile** · 01-23-2011, 07:21 PM

If we are counting out motor mods...I guess I would just leave it like it is...whats the difference if it goes 53 or 55. If someone asks you how fast it goes...just say somewhere in the "50's" and your covered.

**Xfile** · 01-23-2011, 07:28 PM

My bad ,26mm is the XR 200 carb...but there are other mods that go along with this to make it work correctly. I believe the is an dirt wheels article about it over on 3wheeler.com or something like that. It lists everything you need...the early 80's xr200 manifold is one of them. the stock 200x manifold has a smaller ID.

**kjosh1982** · 01-25-2011, 10:43 PM

I appreciate the help, I need to buy another engine to do mods on,
Now I am just going to have to find a place to ride it in SC

josh

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How to get top speed out of my 200x