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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Alessio Corradini, on the Salar de Uyuni, Bolivia, of two locals

I haven't been everywhere...
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Photo by Alessio Corradini,
on the Salar de Uyuni, Bolivia,
of two locals



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  #1  
Old 13 Aug 2007
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Help Identify my Yamaha XT 1989

HI
Looks like a great web site!!
I have had a 1989 Yamaha for 5 years sitting on the side of my garage and finally got around to getting it running and going for a ride or two.

When I bought it the guy told me it was an XT600. But as I have been looking at some of the parts it is missing I believe it is an XT350. Here is the vin
JYA3NVC09KA00....

So, can you guys tell me what I have??
Thanks
Tim
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1989 Yamaha XT350?
1968 RS SS CAMARO
1969 Firebird
1969 oldsmobile 442 convertible
1999 PONTIAC Firebird Trans Am WS6
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  #2  
Old 14 Aug 2007
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Let's see if I can add some pics.
Attached Thumbnails
Help Identify my Yamaha XT 1989-68parts-056.jpg  

Help Identify my Yamaha XT 1989-68parts-052.jpg  

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Tim D
1989 Yamaha XT350?
1968 RS SS CAMARO
1969 Firebird
1969 oldsmobile 442 convertible
1999 PONTIAC Firebird Trans Am WS6
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  #3  
Old 14 Aug 2007
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Looks like an XT 550, maybe Im wrong.
See on a side of the cilinder will says how many c.c.
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  #4  
Old 14 Aug 2007
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thanks for the reply
IT says 1300 CM3 just above and to the right of the oil fill plug.
??? Is that the volume of the crank case? I put 3 quarts of oil in it which I guess would be about that in oil but I still can't see the oil in the hole.
I will look on the cylinder when I get home.
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1989 Yamaha XT350?
1968 RS SS CAMARO
1969 Firebird
1969 oldsmobile 442 convertible
1999 PONTIAC Firebird Trans Am WS6

Last edited by ratchetmaster; 14 Aug 2007 at 04:13.
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  #5  
Old 14 Aug 2007
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Well, I don't know what a 350 looks like exactly, but I can definitely say it is NOT an XT-600 or an XT-550. Forks, frame, swingarm, wheels etc are waaaaay too skinny, plus the 550 has a drum front brake.
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  #6  
Old 14 Aug 2007
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identity

I'm not sure if any of the older xt's had the oil going directly into the crankcase. I have an '86 xt600 that has an external oil tank behind the
left side panel opposite the exhaust silencer. I bet if you posted the engine
and frame serial #'s, one of the guys here on the forum could tell you what
you have in no time, they are awesome!
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  #7  
Old 14 Aug 2007
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thanks to all for your input and help.

Javier got it . . . behind the exhaust pipes on the right side I found the inscription 346 cm3 so it looks like it is in fact an XT350. They guy I bought it from either didn't know or ??

I still have a problem . . .there are 3 fuel lines . . .one from the tank to the carb on the left, a line coming out the bottom of the bowl which goes down to the swing arm (over flow of some sort?) and another that comes off the carb next to the inlet line that crosses over to the other side of the carb next to the throttle body looking carb with no bowl on the bottom.
This line went down to a "V" shape and back up. The bottom of it was broken off.
When i started the bike fuel flowed out the bottom of that line like there was no tomorrow!!
ONe guy I talked to said it was a vent tube?? But I thought it more likely to be a fuel feed line to the throttle body carb.

Can anyone tell me if their bike has something similar?
I will replace that line without the "T" and just connect it together and see what happens.

Thanks
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1989 Yamaha XT350?
1968 RS SS CAMARO
1969 Firebird
1969 oldsmobile 442 convertible
1999 PONTIAC Firebird Trans Am WS6

Last edited by ratchetmaster; 14 Aug 2007 at 19:26.
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  #8  
Old 15 Aug 2007
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Quote:
Originally Posted by ratchetmaster View Post
thanks for the reply
IT says 1300 CM3 just above and to the right of the oil fill plug.
??? Is that the volume of the crank case? I put 3 quarts of oil in it which I guess would be about that in oil but I still can't see the oil in the hole.
I will look on the cylinder when I get home.
3 US quarts = +/-2.840 cm3. Take off 1.600 cm3. Start the engine for a moment (+/-5min) wait few min and then check the level…
Run the engine with a lot of oil will destroy piston rings, seals and others…
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Old 15 Aug 2007
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Quote:
Originally Posted by ratchetmaster View Post
thanks to all for your input and help.

Javier got it . . . behind the exhaust pipes on the right side I found the inscription 346 cm3 so it looks like it is in fact an XT350. They guy I bought it from either didn't know or ??

I still have a problem . . .there are 3 fuel lines . . .one from the tank to the carb on the left, a line coming out the bottom of the bowl which goes down to the swing arm (over flow of some sort?) and another that comes off the carb next to the inlet line that crosses over to the other side of the carb next to the throttle body looking carb with no bowl on the bottom.
This line went down to a "V" shape and back up. The bottom of it was broken off.
When i started the bike fuel flowed out the bottom of that line like there was no tomorrow!!
ONe guy I talked to said it was a vent tube?? But I thought it more likely to be a fuel feed line to the throttle body carb.

Can anyone tell me if their bike has something similar?
I will replace that line without the "T" and just connect it together and see what happens.

Thanks

Well now we are sure it’s a 350.
Usually all bike has only one fuel line on the left, Usually the tap its vacuum activated by a hose between the inlet manifold and the back of the tap, and some also has some other kind of valves on the carb connected by the same or other hoses. The one on the bowl bottom goes by a hose to the ..…floor.
I’m not familiar with 350s carbs….I will see if I can find a Service Manual (easy on this internet times) I recommend you to do the same…
Saludos
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  #10  
Old 16 Aug 2007
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fuel lines

my '86 xt600 has basically the same fuel line that you spoke of going down
into a "y" over the swingarm. i had parked my bike for a few months because
i was going to repaint the gas tank. i had bought a new petcock and knew
it would leak if i had installed it before the repainting plans. to make a long
story short, i finished the painting, got the bike back together, and when i
went to start it for the first time gas poured out of the same tube that you
are talking about. my dad being the old time dualsport rider/roadside mechanic said to tap on the side of the carb with a screwdriver handle a few times. seems the floats were stuck. he must have known what he was
talking about, the bike hasn't done it since. with 5 years of sitting, yours may need a good cleaning. the screwdriver trick would be worth a try though.
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