vintage 200x racer found. stroker motor pics & questions

[200x Basket]

what can anyone tell me about this engine combo? see the spacer under the cylinder

http://picsorban.com/upload/200xracer_0275.jpg

see the space behind the cam

http://picsorban.com/upload/200xracer_0276.jpg

check out the old school tires and small sprocket

http://picsorban.com/upload/200xracer_0277.jpg

[Billy Golightly]

Geesh I dunno, but you'll probably need alot of luck finding a timing chain the right length!

[edog]

When the motor is bored and stroked and using a cam with a high lift and

duration you need the spacer on the bottom of the cylinder.This keeps the

valves from hitting the piston.

As for the spacer behind the CDI...I have no idea.

Looks like an old school flat tracker.

[hutin' unit200m]

my guess is the spacer behind the cdi compensates for a longer camshaft.

[200x Basket]

this thing was raced across the nation. I am supposed to get some pics of it back in the day. it willbe a complete restore project. i also have a line on two 70 racers!!

[edog]

I would love to tear into that motor!!!!

[Kintore]

Even got the whole upside down grabber, man thats sweet! Got any plasctics for it? Pics?

[200x Basket]

no rear plastic but he is looking.

[Tri-ZNate]

what si the point of the holes throught the cooling fins? Cutting down on some weight?

[burnoutboy]

That motor has a megacycle cam.

[burnoutboy]

what si the point of the holes throught the cooling fins? Cutting down on some weight?
Looks like he drilled the frame aswell.

[200x Basket]

the cylinder, the sprocket cover, and the mount have been drilled. there are no drill marks on the actual tubular frame.

[200x Basket]

That motor has a megacycle cam.


how do you know that?

[atcfreak85]

The spacer plat behind the cdi is a megacycle cam. My 200x motor has the same thing. Nice performance cams!:w00t: :w00t: :beer

[200x Basket]

cool. post up some pics. wait until i get pics of hte carb and intake up. it is HUGE

[burnoutboy]

I bet you will find some nice goodies inside that motor.

[200x Basket]

here is the carb. the intake looks billet but i have not had it apart yet. that head and cylinder sure have been lightened!!!

[greenhuman]

I think those cams have a bearing in the spacer plate.

[Bryan Raffa]

thoes holes also create more surface area for cooling

[edog]

Open up that CDI.I wanna see this Cam.:Bounce

I don't really see the point of drilling those holes.

I think it looks silly.I mean how much weight was really reduced.Not much

[edog]

thoes holes also create more surface area for cooling
How do you figure?

[Bryan Raffa]

more edges on the holes for the heat to radaite from or think of it this way a bald tire vs a new one, witch one has more surface area?

better yet,,if you were to paint that jug it would take more paint to paint all the edges... thus more surface area

[firefirefire90]

So lets say I had an aircooled 250R motor with a DG head, would it benefit me to drill holes in the top like that? Sweet 200x though. Does it run?

[edog]

If you are drilling holes....you are reducing weight.

The more alluminum you have the greater heat distribution.Aluminum acts as a heat sink.

[edog]

So lets say I had an aircooled 250R motor with a DG head, would it benefit me to drill holes in the top like that? Sweet 200x though. Does it run?


Please don't go drilling holes in you DG aircooled head.:(

[Bryan Raffa]

no dont do that fire..

[200x Basket]

well the air is the heat sink. i am not sure if it helps or not but i could see more air flow and it would be a LITTLE lighter. also the more surface area thing would depend on how think the fin was. picture if the fin was 2" think then you would remove the area of the bit on the fin but you would expose the 2" thick cylinder that you created.

who cares it is OLD SCHOOL and fun.

[200x Basket]

as far as running? i do not know. he said it drove when he parked it. it does kick over and it has plenty of compression. i have not checked for spark or anything. i plan to clean the carb and see if it runs before i tear it apart.

[edog]

Can you post more pics?

This thing is cool as heck!!!!!!!

[200x Basket]

that is all i have for now. i may take some tomorrow.

[edog]

Is it tomorrow yet??????????lol

[Tri-ZNate]

make sure you measure that carb, I'm curious to see how big it is :). I love old skool

[SWIGIN]

if im remembering right they used 28mm carbs alot back then but those were mikuni flat slides

[XTrumpX]

Back in the day when you didn't have a large budget to buy aftermarket, lighter parts, you drilled what you could to get the extra weight off. His drilling looks like he did it while everything was on the bike because of the angles. On some bikes, the foilers on the back 1/3 and the backside were ground down flush to the jug. And the fins on the head were shaved down a little and also eliminated on the back. Most of this was done by the heavier guys cause they were racing against kids who were around 14 and up and getting beat off the corners because of the weight difference. On the downside, a lot of those warped are seized because of the lack of heat dispersement, which is maybe why guys couldn't afford any other aftermarket part because they were running to Honda for a new jug every month. That brings back memories, I did the same for awhile. Monkey see, monkey do...LOL

[Curtis-Tecate3]

Edog wrote "When the motor is bored and stroked and using a cam with a high lift and duration you need the spacer on the bottom of the cylinder.This keeps the
valves from hitting the piston."

I don't agree 100%
With a stroked crank it would not matter what cam you were running or what compression piston you had as the piston would make contact with the head anyway.

With a stroker crank you are adding to the distance that the piston is traveling and to avoid having the piston contacting both the head and the valves you need to do something with that extra stroke. With 4 strokes the most common practice was to shorten the connecting rod by cutting out a piece and rewelding it back together. Another option is adding a spacer under the cylinder but this would also require new longer cylinder studs as well as a longer cam chain. The last option would be a custom piston with the wrist pin relocated.

I wonder what class this bike raced in as it would certainly have been illegal in the old 200cc classes back in the day.

Curtis.

[SWIGIN]

iv never seen anyone cut a piece of rod out and weld it together, i know for a fact that TC and powroll heat the rod and simply smash them together to shorten them

[200x Basket]

i have no idea what the displacement is. there is supposed to be a big bore in there. who knows? it will be fun to restore. i hope to start on it this summer.

[Curtis-Tecate3]

Swigin,

I stand corrected. I havn't seen a Powroll stroker in 15 or 20 years but remember their rods being discolored in the middle and the lettering distorted. I assumed that they were welded due to the discoloration. You know whaty happens when you assume something.....

Thanks for the clarification.

Curtis.

[super90]

I would love to have that thing. But i would restore it and get rid of all that horrible rust. So what gearing is that? I didnt know they made that small of a sprocket for any 200x. That must be very very high gearing.

[200x Basket]

the frame still looks solid. it needs blasting for sure. i plan to restore it later. i just do not have time right now. my race car needs a new cam and i am painting my 93 GT right now. not to mention i have a 67 camaror that i have been building for two years new. besides it will take some time to collect some of the parts. i want a vintage CEET cover and some nice rear platic. i think the pipe is shot and i am sure the brearings are all bad. so off to the corner it goes for a few months :(

[edog]

Where are the pics?

[super90]

Once its done it should look sweet. So how much did you pay for it? I wish I could find something like that...

[200x Basket]

well non runing 200x's go cheap :)

[edog]

You don't have this thing yet ...Do ya?

[200x Basket]

yes i have it. those pics are in the back of my truck.

here are the final pics for a while. it is now in storage. these fenders are some old ones i had laying around. look pretty good. i must admit i did set on it and dream about sliding around a corner:beer

http://i34.photobucket.com/albums/d124/LuvNStarGazn/3wheeler/200xracer2_0301.jpg

http://i34.photobucket.com/albums/d124/LuvNStarGazn/3wheeler/200xracer2_0302.jpg

[greenhuman]

There are many combinations this motor could be. I notice that is a really thick spacer under the cylinder. Looks around 8 - 10mm. If the crank was a 64mm long rod stroker with a standard deck height piston, big bore or not, the spacer would be 3mm thick. If it had a 67 LR crank, the spacer would be 4.5mm thick. 67 was the longest stroke you could do with a 30mm pin and keep some reliability. But if the pin (26mm) and rod out of a SL or XL125 was used you could get a stroke of around 70mm. It still does not explain such a thick spacer. Helm and Son used to have 67mm forged piston kits that were made to run with their 67mm long rod strokers with no spacer at all. I am guessing this is a 64mm crank with some big bore, high decked piston kit out of a trail or road bike, but who knows? I am getting a headache....

[edog]

Why put it away in storage?

It would look great in my basement.lol

Thanks for the :pics:

Quote

There are many combinations this motor could be. I notice that is a really

thick spacer under the cylinder. Looks around 8 - 10mm. If the crank was a

64mm long rod stroker with a standard deck height piston, big bore or not, the

spacer would be 3mm thick. If it had a 67 LR crank, the spacer would be

4.5mm thick. 67 was the longest stroke you could do with a 30mm pin and

keep some reliability. But if the pin (26mm) and rod out of a SL or XL125 was

used you could get a stroke of around 70mm. It still does not explain such a

thick spacer. Helm and Son used to have 67mm forged piston kits that were

made to run with their 67mm long rod strokers with no spacer at all. I am

guessing this is a 64mm crank with some big bore, high decked piston kit out

of a trail or road bike, but who knows? I am getting a headache....

Reply to Quote


Put a space between your line's that mite help.LOL

[200x Basket]

LOL. this makes me want to tear into it MORE. i will tear it apart to see what it has. i jsut hope i can get the gaskets and new rings to put it back together :(

[200x Basket]

Why put it away in storage?

It would look great in my basement.lol



everything i own is for sale :w00t:

[Dirtcrasher]

Look at the bolt heads next to it. It certainly doesn't look like the head of the wimpy 8mm ignition cover bolts. It looks alot more like the 12mm bolt heads on the left for the engine mounts. I'm gonna guess 12mm. Hold a wrench next to that damn thing and let us know how thick it seems...

[freaksfix]

When you get around to it let me know what size that carb is... I have a 200X thats work up pretty good, but dont know what all is done to it.... It has a big carb not sure what size,, it has a Phase Five pipe that sounds real mean, it also came with old school multi trak tires and a set of 2 piece wheel spacers,, and a set of super scoops.... I picked up a NOS Lockhart oil cooler the other day for it.... The bike is coming out of storage this week, so I can open the motor and take a look at the head and cam,,, and install the Lockhart and my new Hoosiers... I'll get some pics up..

[edog]

When you get around to it let me know what size that carb

is... I have a 200X thats work up pretty good, but dont know what all is done

to it.... It has a big carb not sure what size,, it has a Phase Five pipe that

sounds real mean, it also came with old school multi trak tires and a set of 2

piece wheel spacers,, and a set of super scoops.... I picked up a NOS

Lockhart oil cooler the other day for it.... The bike is coming out of storage this

week, so I can open the motor and take a look at the head and cam,,, and

install the Lockhart and my new Hoosiers... I'll get some pics up..


Can't wait:w00t:

[Rex Karz]

thoes holes also create more surface area for cooling
Only if the diameter of the hole is less than twice the thickness. (someone want to check my math?)

If the holes are larger than 2x thickness, and the motor is stationary, at some point cooling may improve due to the vertical air flow. I doubt it, since the engine generates heat while the Trike is moving forward. If there is a hole in the fin, there is no path for the heat to travel to the outside of the fin except around it. If it worked, the manufacturers would do it. I'm guessing the owner didn't do any real thermal resistance calculations or testing, though.:lol:

[greenhuman]

Filing the ends of the fins to a knife edge would dissipate the heat better.

[bonkers_200s]

A true diamond in the rough, nice find and good luck with the old girl.

[Dirtcrasher]

I gotta bring this back because we never got to find out whats inside....

Any updates basket??

[200x Basket]

i still have not touched it. sorry

[AutoXer]

its 2009 ....... we still don't know what is in this awsome time piece

[the great gazoo]

This thread is so old, the pics don't load anymore, at least for me. Can you reload a few, I think I missed this one. Please?

[Custom200]

Yeah same I missed this thread when it was first posted and I havent seen any of the pics because they dont load for me either. Like to see them reposted.

[aaron7]

So what's it take to buy that thing off you?