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Old 08-13-2013, 12:07 PM   #1
time2getill OP
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Joined: Aug 2013
Location: Florida
Oddometer: 5
Eek 1974 Yamaha RD200

I got a couple questions.

1. I have a box with 2 engines in parts in it. One has 4k miles on it, other is supposedly new. I have had a few people on here look at the parts and think that the engines are "unusable"... What should I do with them if this is in fact true. (is there a way to "sell" them? "scrap" them? etc... I have no idea...)

http://i1286.photobucket.com/albums/...ps1a377711.jpg

2. If I buy a new engine for it, could I go bigger to say a rd350? Or would this cause me a lot of extra work because the frame was built for the rd200?

3. Is there an easier option that I am not thinking about.

I am currently stripping the bike down to the frame and "cleaning" everything up. I am not doing a "restoration"... Just working on a custom hopefully running bike.

http://i1286.photobucket.com/albums/...ps601fcfc4.jpg

http://i1286.photobucket.com/albums/...ps8bbe3c29.jpg
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Old 08-14-2013, 12:01 PM   #2
Twin-shocker
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The cost of getting that bike into usable condition, is probably going to be more than buying something similar thats up and running and ready to ride.
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Old 11-04-2013, 10:31 AM   #3
c0rn_d0g
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I'd buy them.


Hard to tell if all the parts are there, but with a little time and a lot of patience and a little bit of mechanical skill, you can get them together.
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Old 11-04-2013, 10:49 AM   #4
markjenn
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There might (or might not) be a complete engine in those boxes. There certainly are a lot of valuable parts. Only way to know is to get good documentation and start putting one together. Your first order of business is to get a service manual (factory is best, but aftermarket ones are valuable) and a good parts diagram/fiche. The parts are certainly valuable if you want to sell them, but to get full value, you'd need to ID all the parts and market them effectively, typically on sites like Ebay and/or a specialist RD site.

I'm not a RD specialist, but I don't think the RD200 chassis was designed to take the larger RD350 engine. I think there was a RD250 version of the RD350 (not sure if it was ever sold in the US), but the RD200 was a separate product line with a completely different chassis.

If you're not experienced in doing a project like this, you need to go very slow, ask for a lot of help (in forums like this) and be very willing to learn. Anyone with average mechanical aptitude and a few tools can do it, but it requires patience and perseverance. Alternatively find someone who knows what they're doing. Someone who knows RD200's could figure stuff out in minutes what is going to take you weeks. But learning on your own is fun. The details are extremely important - miss a circlip or put an o-ring in wrong and the engine will not work properly.

There is another RD build thread on this site which will show you what you're up against.

If your only goal is to get a running bike, I'd get rid of the lot for whatever you can get as is and go find a running bike.

If you do go ahead with this, one mistake I often see is people spend a lot of time on cosmetics before they get the mechanicals sorted. They then lose momentum and end up with a lot invested that is scrapped. Keep your eye on the ball initially - build up the engine, get it in the chassis, and get it running - that's all you care about. A running bike will charge you up for the next phase. You can sort everything else out later.

- Mark

markjenn screwed with this post 11-04-2013 at 10:56 AM
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Old 11-04-2013, 02:00 PM   #5
Brad-Man
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The RD250 and RD350 were basically the same bike , with the 350 having a bigger bore and different primary gearing. The transmissions and cranks/rods were the same.

Only heads and pistons and of course the primary gearing was different...

he first year RD250 also had a drum brake in front....

I would check out .
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Old 11-04-2013, 02:12 PM   #6
markjenn
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Quote:
Originally Posted by Brad-Man View Post
The RD250 and RD350 were basically the same bike , with the 350 having a bigger bore and different primary gearing. The transmissions and cranks/rods were the same.

Only heads and pistons and of course the primary gearing was different...

he first year RD250 also had a drum brake in front....

I would check out .
He has a RD200, not a RD250.

- Mark
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Old 11-21-2013, 07:31 AM   #7
Foot dragger
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The 200 RD's are neat little bikes but worth next to zilch when up and running,I agree with selling the parts and finding a running bike unless your a wizard mechanic. It gets pricey building up a parts bike.
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Old 11-21-2013, 07:44 AM   #8
Blakebird
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if all the parts were there and in good condition....I'd consider building it up into a runner.

there's just too much rust and cleanup involved on the parts that are there, the time you'd spend getting stuff presentable just isn't worth it IMO.

part it out and go find an R5, R5B, or RD350 that is presentable.
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