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Author Topic: Yam RD "Blue Dream"- Ride,Maintain,Tune  (Read 35762 times)

Offline teazer

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Re: Yam RD "Blue Dream"- Ride,Maintain,Tune
« Reply #20 on: Jul 06, 2015, 10:53:15 »

I gave the carbs a little clean out to,the little air drilling of the right carb was blocked.

Ryan,,  Is that head cracked in the second picture or is that just an optical illusion? 

Offline Ryan Stecken

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Re: Yam RD "Blue Dream"- Ride,Maintain,Tune
« Reply #21 on: Jul 08, 2015, 12:37:09 »
Hey guys!

iŽm running a 2 stroke oil i bought a oldtimer market,i will look up what kind of oil it is.
what should i look out for when isnpecting the rings?

yes this is a hair crack...:-( how something like that happen?should i be worried?is it repairable?
it actually looks mare like a scratch,there is no visible crack on the other side of the head (threads of plug).
iŽll post pics when iŽm on my computer again!
« Last Edit: Jul 08, 2015, 12:41:59 by Ryan Stecken »

Offline Tune-A-Fish©

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Re: Yam RD "Blue Dream"- Ride,Maintain,Tune
« Reply #22 on: Jul 08, 2015, 12:48:43 »
As for the rings, I would look for a chip or anything causing the scratched walls, the crack is strange, you could get it magnafluxed to see if it can be repaired, any decent weld shop can help with that, but probably was from heat and cooling to fast or pinging really hard, you don't run corn gas do you? E fuel is probably not a good idea for the old 2 Smokers.

Teazer may shed light on the cracks at the top of the chamber as something completely different... Interesting spot to crack.
"I didn't come here and I ain't leavin"  Willie Nelson

"love hard, live fast, die fun" Kacey Musgraves

"Like a Wreckin Ball!" Eric Church

Offline jpmobius

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Re: Yam RD "Blue Dream"- Ride,Maintain,Tune
« Reply #23 on: Jul 08, 2015, 14:20:52 »
Yep - that is an unusual crack in my experience.  Oil choice is no joke.  Looks like some pretty excessive coking buildup unless you have vastly more miles than it sounds.  Looks castor based maybe?  No good at all on a street bike unless you like taking your engine apart after every ride to clean it.  I use plain old Yamalube mostly - economical and very clean.
Mobius


On a long enough timeline, the survival rate for everyone drops to zero.

1973 RD350 Yamaha build  http://www.dotheton.com/forum/index.php?topic=66498.0

Offline Ryan Stecken

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Re: Yam RD "Blue Dream"- Ride,Maintain,Tune
« Reply #24 on: Jul 09, 2015, 12:36:09 »
Hey guys!as for the gas i'm using the standard 95 octane unleaded gasoline we have in austria (we also have 98 octane but i heard to use this is just a waste of money.
For the burning oil i bought an oil from a specialised oil distributor in austria you see in the pic.
It says 2 stroke oil,part synthetic.
Specification: API TC

For the gearing oil i use:Motul 10W30 Motorcycle Gear Oil


« Last Edit: Jul 09, 2015, 12:38:12 by Ryan Stecken »

Offline Tune-A-Fish©

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Re: Yam RD "Blue Dream"- Ride,Maintain,Tune
« Reply #25 on: Jul 09, 2015, 13:20:34 »
I would see what Motul 2T oils are available for "burn oils" also, I have no idea what Yamaha or your injection system has for mix ratio so the only thing you can do is try oils and watch the baffles for drool, all that unburnt oil is plugging up the air flow through the motor (air pump) and as soon as you dial in the consumption you should see less mess and better perf, maybe viscosity is key, I just don't know, but it has to burn.  If it were mine I would covertly disconnect the injection system and go premix unless you plan to ride more than a tank at a time and even then I used to keep oil in a Ziploc freezer bags, pump a shot of gas in and shake it up then dump it in the tank with the gas pumping slowly, you can fit a dozen measured bags in the cowl tucked inside a cut off oil bottle in case one should leak. 
"I didn't come here and I ain't leavin"  Willie Nelson

"love hard, live fast, die fun" Kacey Musgraves

"Like a Wreckin Ball!" Eric Church

Offline Tune-A-Fish©

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Re: Yam RD "Blue Dream"- Ride,Maintain,Tune
« Reply #26 on: Jul 09, 2015, 13:22:32 »
If you ever do go premix, you will need to fatten the mains some... again viscosity will play a role here.
"I didn't come here and I ain't leavin"  Willie Nelson

"love hard, live fast, die fun" Kacey Musgraves

"Like a Wreckin Ball!" Eric Church

Offline Ryan Stecken

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Re: Yam RD "Blue Dream"- Ride,Maintain,Tune
« Reply #27 on: Jul 15, 2015, 10:21:24 »
So iŽve just ran into a little annoying problem i need to find a solution for:

The carbs of the RD do never leak when i ride it,even when parked for 1-2 days they keep the gasoline pretty well.
But when i park the bike for more then a few days it slighlty drips...which sucks cuz i park the bike indoors in my fathers workshop  :D.
the carbs got pretty rebuild and cleaned thoroughly.
i only see these options:

-draining the float bowls before i park it:either with the drain screw or "riding" it empty by closing the petcock and waiting it to get empty.-->it takes YEARS in idling to clear the bowls,draining it by riding it empty is pretty risky in city traffic...
-somehow blocking the overflow hoses temporarily when i park it.

another guess of mine is that the petcock is leaking...although i replaced the oring that seals some weeks ago...it alsoways seem the drip a little bit...

Offline Tune-A-Fish©

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Re: Yam RD "Blue Dream"- Ride,Maintain,Tune
« Reply #28 on: Jul 15, 2015, 10:57:01 »
The only way the bowls drip is from over fill so if the floats are set correctly the needle(s) may be sweating just enough to drool on the floor and yep! if that is what's happening... off on the petcock is not really off then is it ;) I would set out for an NOS petcock or a nicer replacement and hold onto the original for a keepsake to pass on.   :o
"I didn't come here and I ain't leavin"  Willie Nelson

"love hard, live fast, die fun" Kacey Musgraves

"Like a Wreckin Ball!" Eric Church

Offline Tune-A-Fish©

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Re: Yam RD "Blue Dream"- Ride,Maintain,Tune
« Reply #29 on: Jul 15, 2015, 11:05:41 »
I can say with some certainty these guys at HVC do a decent job, you could just call direct and get what you need also.

http://www.ebay.com/itm/Yamaha-RD-RD200-Petcock-RD200-Fuel-tank-Valve-360-24500-00-00-/400277728731?hash=item5d32696ddb&vxp=mtr
"I didn't come here and I ain't leavin"  Willie Nelson

"love hard, live fast, die fun" Kacey Musgraves

"Like a Wreckin Ball!" Eric Church