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Old 10-24-2011, 01:28 PM   #1
thomasac92 OP
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Yamaha RD350 clean up/rebuild *Help*

I just purchased this 1973 Yamaha RD350 a few days ago for $750. It's not running, and it needs a lot of work, e.g. carbs, points, gas tank, brakes, rust, greasy mess. This is my first motorcycle so, I figured I would go all out.





I downloaded the original manual for it online but it didn't explain how to remove the carbs for cleaning. I tried for a while earlier but I don't have an allen wrench that can fit between all of the hoses and tight corners. I tried just loosening the clamps at the y-boot and on the other side but there wasn't enough play to remove it. Am I doing this wrong?

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Old 10-24-2011, 01:33 PM   #2
gloud
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You need to loosen the clamps next to the carbs, try to rotate them first. that will loosen them up. then the fun parts it to get the 35 year old rubber on the back of the carbs to the airbox to bend a little so you can move the carbs back and then
twist them to the outside. take the sidecovers off and the tank and you will have a better go at it.

Make sure to take the oil injector lines off too. the clamp on them slides off and then you can twist the line a little to help break it free.

Oh and do yourself a favor and buy a few cans of engine cleaner and a scub brush and start cleaning it BEFORE you take the carbs off.
That thing is Nasty.
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Old 10-24-2011, 01:36 PM   #3
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That's what I was doing earlier but I could only get the right carb to move. I guess I'll just mess with it some more.
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Old 10-24-2011, 01:39 PM   #4
thomasac92 OP
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It probably looks a lot worse than it is since it's painted black. But its still pretty gross.
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Old 10-24-2011, 01:58 PM   #5
Sniper X
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Quote:
Originally Posted by thomasac92 View Post
It probably looks a lot worse than it is since it's painted black. But its still pretty gross.
I don't think that is black paint, probably 2 stroke oil caked all over the carbs. DON'T remove the oil lines! Take the carb top after you get the carbs clamps loose and remove them and we will go from there. FIRST I would take it to a quarter car wash, and apply a half gallon of degreaser and let it sit for a half hour and go for it with the high pressure hose.
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Old 10-24-2011, 02:01 PM   #6
stainlesscycle
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theres a rubber line between the 2 carbs that might be rotted/stiff and stopping them from rotating...
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Old 10-24-2011, 02:12 PM   #7
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theres a rubber line between the 2 carbs that might be rotted/stiff and stopping them from rotating...
Part of the reason I suggest a big time cleaning before trying to rip it apart.
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Old 10-24-2011, 03:29 PM   #8
Houseoffubar
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Get the rubber GOOD, and warm, this will help too.
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Old 10-24-2011, 05:07 PM   #9
hrcs90
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Part of the reason I suggest a big time cleaning before trying to rip it apart.
Yes, clean the S.O.B first. Also a can of silicon spray to help with the petrified rubber pieces. I have always had good luck with Honda's silicon, if they even sell it anymore.
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Old 10-24-2011, 05:13 PM   #10
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Sweet!
I just started an RD project myself.



Did this like a month ago:
pulled everything that was going into the carbs,
got the throttles off
loosened the clamps
and pulled it away from the boot and intake.

I didn't have to use it,
but if I met with any resistance I woulda reached for some WD.



So, why are we telling this guy not to take the oil lines off?




Thomas - how long has the bike been sitting?
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Old 10-24-2011, 07:07 PM   #11
stainlesscycle
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the little oil lines nipples are not available (or weren't least time i looked) - and i've seen broken ones...
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Old 10-24-2011, 07:48 PM   #12
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I think what people are trying to say about the oil nipples is that you should pull them out of the carbs, instead of pulling the lines off of the nipples. That's how I deal with mine when I take my RD's carbs off. I would also recommend putting a small dab of threebond around the nipples when you put them back into the carbs. I had one vibrate out once. I looked down and I had oil all over the side cover and my shoe. Miraculously, the engine was okay. I still can't see how that would be. I would say the most important thing you can do towards RD understanding and happiness, is to check out 2strokeworld.com. Not to shit on folks here, but there is a good group of RD obsessed folks like me over there. Without them, I would have given up on trying to get mine running well. Have fun with your RD. Every time I ride mine, I just can'r believe what a blast it is.
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Old 10-25-2011, 03:44 AM   #13
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OP, tell us a bout yourself, specifically your skillset. We need to know at which level you will begin. Past repairs? Lawnmowers? Cars? Boats? Cylinder index? more info please...
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Old 10-25-2011, 04:51 AM   #14
Mattbastard
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Don't worry about taking the lines off. There's these things called Corbin Clamps. They work great for spring clamping down hoses.

When I bought my first RD350 project I just took it apart, cleaned everything, then modified as I put it back together.

Also, http://www.HVCcycle.com
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Old 10-25-2011, 06:54 AM   #15
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Looks pretty original, nice find. Had a friend who had a 350 and a 400 back in the day, and I alway kinda wanted one myself. If you get tired of messing with it just PM me and I will give you my address for forwarding it to...
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