85 200x Rebuild (HOW)

[TheR]

First I want to say Happy New Year to everyone, and I hope you all had a good holiday.

Now, I have tons of questions about rebuilding the 200x, so I hope you guys don't mind helping me out.

1. I want to make the 200x better and faster than it is in stock form, so what upgrades do I need to purchase? (Brand Please)
2. Does anyone have a step by step procedure how to do a rebuild on this trike? Is it hard?
3. I have no prior experiance with engine rebuilds, so is there any advice you guys can give me?

That's it for now, I'll have plenty more when I start tearing the trike down.(LATER TODAY)

The R

[Fuzzy]

If you are going to do a total engine rebuild i would recommend getting a manual for it if you dont have one allready.

You can order a piston and rings for it at many places. www.denniskirk.com sells a good selection of oversized Weisco piston and rings sets. You can also get a complete gasket set from them for around $20.00.

After you get your new piston and rings. Take the cylinder and piston and rings to a machine shop and have them do the boring. If you are going to have head work done also take that with you and have them resurface the valve seats and valves.

Then it is simply a matter of putting it all back together. That is where the manual will really help. Once you have your engine back together and mounted. You can look at after market exhaust for it like a cobra which DK also sells. And maybe rejeting your carb and getting a good free flowing airfilter for it like a K&N.

[TheR]

Originally posted by Fuzzy
If you are going to do a total engine rebuild i would recommend getting a manual for it if you dont have one allready.

You can order a piston and rings for it at many places. www.denniskirk.com sells a good selection of oversized Weisco piston and rings sets. You can also get a complete gasket set from them for around $20.00.

After you get your new piston and rings. Take the cylinder and piston and rings to a machine shop and have them do the boring. If you are going to have head work done also take that with you and have them resurface the valve seats and valves.

Then it is simply a matter of putting it all back together. That is where the manual will really help. Once you have your engine back together and mounted. You can look at after market exhaust for it like a cobra which DK also sells. And maybe rejeting your carb and getting a good free flowing airfilter for it like a K&N.

Thanks for the Info. What size Weisco piston can I run (HOW BIG)? Will it require me to run race gas, or can I still put 93oct in the tank? What does a head job do?:lmao: And I do have the manual.

Thankz

The R

[250sx]

you'll only need racegas if you get a high comp. piston. your machine shop will tell you what size piston you need. however, if they don't insist on having the piston you'll be using before they bore it then find another shop! bore only as large as you need...don't waste your time boring for power.

recreationunlimited.com has a good price on wiseco piston/ring/gasket sets...$100

[TheR]

Originally posted by 250sx
you'll only need racegas if you get a high comp. piston. your machine shop will tell you what size piston you need. however, if they don't insist on having the piston you'll be using before they bore it then find another shop! bore only as large as you need...don't waste your time boring for power.

recreationunlimited.com has a good price on wiseco piston/ring/gasket sets...$100

Thankz for the reply 250sx,

I'm slowly catching on to this rebuild stuff, so correct me if I'm wrong. When I take the engine apart, take the cylinder and piston to a shop to have them bore the cylinder out to fit the piston (I THINK). Now my question is what is the difference between the pistons, is the bigger the better or is the smaller the better?(have patience with me here:confused: ) Should I order the kit from recreation and have a shop do the entire rebuild or should I do it? Also I noticed on that site that the kit is a top end kit, is there a bottom end kit or is there such a thing?

The R

[250sx]

We all gotta learn sometime. You first have to take the cylinder to a machine shop (or whereever) to have them measure the current bore & see what size bigger will be necessary to clean it up. Then you order a top end kit with the appropriate-size piston. Then you take the piston & cylinder to the machine shop & they will bore the cylinder to match the piston.

bigger will make more power, but unless you get a BIG BORE kit (which I doubt they even make for a 200x) you won't notice the difference. You just want to bore it out enough to clean up the cylinder for good sealing.

Sometimes you have to rebuild the bottom end too, but not nearly as often as the top. With the cylinder off & piston off move the rod side-to-side and up-down looking for play. You may want to take the whole trike at this point to a cycle shop or someone who's done it before and have them check the rod for excessive play. A little is fine, but it's hard to explain how much is ok over the computer.

I should also ask you this...why areyou rebuilding the motor? If it's not smoking or knocking I'd say leave it alone. Don't rebuild it just to get more power (unless you're going to a high-comp piston & are ready to run racegas). there are plenty of other mods you can do to a good motor that will increase power.

[TheR]

Originally posted by 250sx
We all gotta learn sometime. You first have to take the cylinder to a machine shop (or whereever) to have them measure the current bore & see what size bigger will be necessary to clean it up. Then you order a top end kit with the appropriate-size piston. Then you take the piston & cylinder to the machine shop & they will bore the cylinder to match the piston.

bigger will make more power, but unless you get a BIG BORE kit (which I doubt they even make for a 200x) you won't notice the difference. You just want to bore it out enough to clean up the cylinder for good sealing.

Sometimes you have to rebuild the bottom end too, but not nearly as often as the top. With the cylinder off & piston off move the rod side-to-side and up-down looking for play. You may want to take the whole trike at this point to a cycle shop or someone who's done it before and have them check the rod for excessive play. A little is fine, but it's hard to explain how much is ok over the computer.

I should also ask you this...why areyou rebuilding the motor? If it's not smoking or knocking I'd say leave it alone. Don't rebuild it just to get more power (unless you're going to a high-comp piston & are ready to run racegas). there are plenty of other mods you can do to a good motor that will increase power.

To tell you the truth, it's not knocking or smoking, but since I only paid $250.00 for it, I figured I would rebuild just to make sure the engine was okay. But since it's not smoking or knocking I guess I can do without.
So what else can I do the make it faster, because I'm buying my wife a 2003 suzuki Z-250 and I can't have her beating me :nono: .

[TheR]

PIC of the $250.00 Machine

[Fuzzy]

Maybe just start with a good pipe and aircleaner. And maybe if you have to change sprockets for more speed. Like replaceing the stock 12/40 setup with a 13/38 to give you more top speed.

[TheR]

Originally posted by Fuzzy
Maybe just start with a good pipe and aircleaner. And maybe if you have to change sprockets for more speed. Like replaceing the stock 12/40 setup with a 13/38 to give you more top speed.

Excellent, Thankz 250, I really appreciate the knowledge you have passed on to me. Will I lose anything is I change the sprockets, and also I have noticed the wheel will wobble a little in the back, but I only noticed when my wife rode it, I can't tell when riding. Do I need to put on a new axle?

Thankz

The R

[250sx]

you may have a bent rim or a loose/worn hub. Either way check it out so you don't ruin the axle.

If you change the sprockets you will lose acceleration but gain top speed. it's a trade off...which do you want more?

If the motor is in good shape you can do lots of little things that will add up like a filter, no airbox lid (if you don't get in mud/water), pipe, bigger carb, different cam, ported head, etc. etc. There are lots of 200x mods. Have you seen the magazine articles I have scanned?

[84200s/m]

tighten your hubs and check your bearings (lift the back end and woble the axle up and down the will tell if its bearings or bent axle hub or rim)

by the way that one hell of a deal on a 200x

[TheR]

Originally posted by 250sx
you may have a bent rim or a loose/worn hub. Either way check it out so you don't ruin the axle.

If you change the sprockets you will lose acceleration but gain top speed. it's a trade off...which do you want more?

If the motor is in good shape you can do lots of little things that will add up like a filter, no airbox lid (if you don't get in mud/water), pipe, bigger carb, different cam, ported head, etc. etc. There are lots of 200x mods. Have you seen the magazine articles I have scanned?

I want both if possible, but if not than I'll take top end. I haven't seen any scans of magazine article's. How do I locate them? What size carb? What cam is best for more performance? what does a ported head do?

[TheR]

Originally posted by 84200s/m
tighten your hubs and check your bearings (lift the back end and woble the axle up and down the will tell if its bearings or bent axle hub or rim)

by the way that one hell of a deal on a 200x

Will do? Thanks

[Fuzzy]

LOL you dont have any shortage of questions do you?.:D

Porting the head will allow air to flow through it smoother and faster.

As far as carbs your stock one is 24mm you could go up to a 28mm.

Cams you dont want to get too radical. The stock one is pretty good. And if you arnt going to do any major engine work i would leave it ifs it ok.

As far as the gearing i think the 200x is geared too low stock. I hardly ever use first. I even do all my burnouts in at least 2nd gear. So i wouldnt worrie too much about looseing low end. But you might want to wait until you get the 250 and see how it compaires. Chances are it will outrun it allready with stock gears.

[TheR]

Originally posted by Fuzzy
LOL you dont have any shortage of questions do you?.:D

Porting the head will allow air to flow through it smoother and faster.

As far as carbs your stock one is 24mm you could go up to a 28mm.

Cams you dont want to get too radical. The stock one is pretty good. And if you arnt going to do any major engine work i would leave it ifs it ok.

As far as the gearing i think the 200x is geared too low stock. I hardly ever use first. I even do all my burnouts in at least 2nd gear. So i wouldnt worrie too much about looseing low end. But you might want to wait until you get the 250 and see how it compaires. Chances are it will outrun it allready with stock gears.

Thanks for all the help, I just can't have the wife whuppen on me.

[Fuzzy]

No problem. I think you shouldnt have any problem leaving the 250 in the dust. I spent most of the sumer racing againt a 500 scramber. And the 200x stayed right with it all day long.

[TheR]

Originally posted by Fuzzy
No problem. I think you shouldnt have any problem leaving the 250 in the dust. I spent most of the sumer racing againt a 500 scramber. And the 200x stayed right with it all day long.

Thankz, I'll let you know what happens:headbang: :headbang: