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Old 11-04-2009, 08:45 AM   #751
SkidMarx
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Location: Ortonville, MI
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Quote:
Originally Posted by J-Ball
SkidMarx... Snorkle back in?? Bummer, I love new throaty wroomp...wroomp.. sound! I've had more seat time now, it does shudder at WOT sometimes but not always. Also, I sometimes notice when going up a long steep hill and continue to get on the gas more it will shudder some, like it's running out of fuel.

Is this where the mixture screw that was under the brass plug needs adjusting? Or is this more of a re jet thing?

Otherwise, it starts up perfectly, and runs great. It does has the typical "XT tick" where it will miss very randomly. Only other complaint is the throttle does seem a bit boggy, not as responsive as I'd like it to be.

All in all, just glad to be back on the ole XT, too much fun!
Give it a try. It will at least tull you if you are still lean. If it helps, you can put it back in and work on the jetting.
Start with the main jet.
If it starts and idols fine, leave the Pilot screw alone.
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Old 11-04-2009, 02:03 PM   #752
tate
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Joined: Apr 2008
Location: Nolensville, TN
Oddometer: 33
Quote:
Originally Posted by Stagehand
Hey Tate, were did you get sprockets?
i wanted steel sprockets and this is what i bought...
this is the front sprocket i put on the bike:
http://www.sprocketspecialists.com/P...roductID=15943
this is the rear sprocket:
http://www.mxmegastore.com/JTR845-46T-p/249917.htm


both fit perfectly with a new 520 oring chain.

t
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Old 11-04-2009, 03:38 PM   #753
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Quote:
Originally Posted by tate
i wanted steel sprockets and this is what i bought...
this is the front sprocket i put on the bike:
http://www.sprocketspecialists.com/P...roductID=15943
this is the rear sprocket:
http://www.mxmegastore.com/JTR845-46T-p/249917.htm


both fit perfectly with a new 520 oring chain.

t
NICE! thanks!

How the hell did you know the rear sprocket from a1980-81 YZ100 was going to fit?
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Old 11-04-2009, 05:25 PM   #754
skahuna
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Location: bucks county pa.
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xt350 520 steel sprockets

these work

Parts Unlimited Front Sprockets (Yamaha XT600C 1989)

5848025-001 | Teeth: 14 1 $11.65
---------------------

Parts Unlimited Front Sprockets (Yamaha XT600C 1989)

5848025-002 | Teeth: 15 1 $9.85
---------------------

Parts Unlimited Rear Sprockets (Yamaha XT250C 1984)

5849855-001 | Teeth: 46 1 $30.55
---------------------

Parts Unlimited X-Ring Chain, 120 links (520 SO)

5832049-001 | - 1 $58.95
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Old 11-04-2009, 06:56 PM   #755
tate
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Location: Nolensville, TN
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Quote:
Originally Posted by J-Ball
Tate.. that's a fat looking back tire you've got there.. what size you running? I'm looking to get the largest rubber I can on mine, what sizes are you guys running that works well? front and rear. The Maxxis IT is looking good.

As mentioned in recent posts I had a stuck jet in the secondary carb, the Yammie shop got it fixed up, cleaned the carb, other jets, float adjust, drilled the brass plug to the air mix screw etc, said it was good to go. It runs well but still at W.O.T. it cuts out, stutters like Mel Tilis. Seems like it's not getting enough fuel...needs larger main jet ect? Ideas? As said before the Yammie shop said larger jets wern't needed so all stock at the moment. Only mods, UNI filter and de-snorkeled... living at 1000' elevation.

Also, anyone have a p/n for a bright-ass headlight bulb? Whats the best way to seach for this stuff, the search on this site dosn't work so great...

Ride on...
5.30x18 is the tire size on the back. the knobbies on the outside have rubbed some of the guard away. i'll be switching the tires soon. these were on it when i bought it.

i want a 70 street/30 dirt or 80 street/20 dirt tire. anyone have any suggestions?

t
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Old 11-04-2009, 07:17 PM   #756
Stagehand
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Location: Shawangunks
Oddometer: 25,179
Quote:
Originally Posted by skahuna
these work

Parts Unlimited Front Sprockets (Yamaha XT600C 1989)

5848025-001 | Teeth: 14 1 $11.65
---------------------

Parts Unlimited Front Sprockets (Yamaha XT600C 1989)

5848025-002 | Teeth: 15 1 $9.85
---------------------

Parts Unlimited Rear Sprockets (Yamaha XT250C 1984)

5849855-001 | Teeth: 46 1 $30.55
---------------------

Parts Unlimited X-Ring Chain, 120 links (520 SO)

5832049-001 | - 1 $58.95

:woot thank you very much! A 14/55 should climb trees. Wonder if the chain rubs unacceptably?
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Old 11-05-2009, 05:56 AM   #757
J-Ball
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Location: Llano County, TEXAS
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Thanks for the input guys.
Skid, I'll re snorkel and see what happens. Also I have an old Super Trap coming in so once its in and installed I'll start going up on the main jet and see what happens. My mission, un cork this engine!

With a UNI, de-snorkled an old Super Trap where should I start with the jetting?? (1000' elevation)

Great info on the 520 conversion guys, that's my next step after getting engine to run right. I'm hoping to get enough grunt out of this engine to pop the existing chain. Can I dream?!?

Tate, I'm digging the knobs BUT, I can tell you the Michelin Anakee is a great tire for what you are wanting to do. I'm running one on the rear of my MZ Skorpion Tour and it's great on pavement and gravel roads etc. Wears really well. Of course not so good on mud etc. Also I have an Avon Distanzia on the front and it's pretty good too. Might be worth a look. Also, many here dig the MEFO Explorer. Both will let you drag your pegs in the corners if you wanna go there AND take you off road fairly well.
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Old 11-05-2009, 06:19 AM   #758
SkidMarx
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My canned response seems to apply here.

-----------------------------------------------------------------
If you richen things up now a little, you should be able to get away with a supertrapp and maybe pulling the snorkle out later and it should run even better the way it sits.
Here is what I would do.
Go buy a 130 and a 140 main jet for an XT600. That should cover you for opening her up now and later.

Now pull off your head pipe and grind down the weld inside the front where it goes into the head. It isn't much, but it cant hurt.

Now put in the 130 and shim the needle on the main. I used the eye of an electrical connector. Just the right size and it's not too thick.
leave the secondary alone.
You may need to turn the pilot screw out a little more.
Everyone is trying to find something for the Pilot jet, but untill someone does, I'd leave it alone.
My solution was to work a torch tip file into it to open it up a little. There was one that just barely fit. I have no idea what it opened it up to, but I think it helped. It was actually OK the way it was so it's no big deal if you don't mess with it. I tried a drill first, and the next size up is too big so I had to buy a new one. Wasn't worth the effort.

So now you've opend it up a little more, and the carb should be rich enough to slap a supertrapp on without any changes later.
-----------------------------------------------------------------
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Old 11-05-2009, 11:41 AM   #759
InfiniteMiles
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Does any one know if the XT350 can handle powering a trail tech Vapor spedo/tach.
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Old 11-05-2009, 12:39 PM   #760
SkidMarx
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Shouldn't be a problem. Run it off the battery side.
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Old 11-06-2009, 03:52 AM   #761
jegrmajstr
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Location: Slovenia, Europe
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Quote:
Originally Posted by tate

i want a 70 street/30 dirt or 80 street/20 dirt tire. anyone have any suggestions?

t

Avon Distanzia AM44 Very good on the street, decent in the dirt + it'll last forever with that thick running surface My rear tyre has around 2500 miles on it and it looks untouched
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Old 11-06-2009, 08:06 AM   #762
J-Ball
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Thanks Skid! Ordering a 130 and 140 for an XT600. I'll take the steps you mention and see what happens.
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Old 11-06-2009, 10:08 AM   #763
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Charging Mystery

Bike won't charge. Shows only battery voltage (11.8) when running and revved. All coils within ohm specs. Checked connections. Any ideas?
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Old 11-06-2009, 10:17 AM   #764
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35,000 Miles On An XT 350

From 1994-2004 I put 35,000 trouble-free miles on my XT 350. Rode it everywhere and every place on the East Coast while riding to, riding in, and riding home to/from many Dual Sport Nationals, Blackwaters, and my own DS events. Check my website for details - www.backroadbob.com.

An absolutely indestructible bike. Needs fork, shock, and carb mods to be decent, but the motor's as dependable as a rock. After 35,000 hard miles, the valves showed no wear and nothing broke. The only things that wore out were the tires, brakes, chains, sprockets, and odometer drive hub. A great little bike that's a much better ride, especially on the road, than it has any right to be.
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Old 11-06-2009, 11:04 AM   #765
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My 1989 XT only has 15k miles on the clock and its already burning oil. I'm about to tear in to the top end but I can't believe that it would already need valve work or a rebore with only 15k miles. Any thoughts?

I'm going to check
Valve seats
Valve seals
Piston rings
Piston to wall clearance
Gaskets

and the cam shaft bearing clearance, but I'm honestly lost.

Any help would be greatly appreciated, I bought this bike because it is simple and reliable, hopefully I'll get this problem fixed and ride cross country next summer.
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