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Old 09-26-2007, 10:32 AM   #1
Burtonridr OP
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Location: Idaho
Oddometer: 3,717
The XT350 thread

Use this thread to ask questions,share tips, share good links, photos & stories about yamaha's great little XT350.

Bike Specifications for quick reference:

Displacement:346.00 ccm (21.11 cubic inches)
Engine type:Single cylinder
Stroke:4
Carburetor:
24mm Teikei
Power:27.00 HP (19.7 kW)) @ 8000 RPM
Compression:9.0:1
Bore x stroke:86.0 x 59.6 mm (3.4 x 2.3 inches)
Valves per cylinder:4
Fuel control:DOHC
Cooling system:Air
Gearbox:6-speed
Transmission type
final drive:
Chain
Physical measures
Weight incl. oil, gas, etc:150.0 kg (330.7 pounds)
Dry Weight:
262 pounds
Overall Height:
88.2"
Overall Width:
34.1"
Overall Length:
47.6"
Ground Clearance:
10.8"
Wheel Base:
55.9"
Seat Height:
33.7"
Chassis and dimensions
Front Fork
Telescopic forks w/ 10" of travel
Rear Shock
Single Rear Shock w/ 8.6" of travel
Front tyre dimensions:3.00-21
Rear tyre dimensions:110/80-18
Front brakes:Single disc
Rear brakes:Expanding brake
Speed and acceleration
Top speed:135.0 km/h (83.9 mph)
Other specifications
Fuel capacity:12.00 litres (3.17 gallons)
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Burtonridr screwed with this post 12-19-2008 at 10:37 AM
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Old 09-26-2007, 10:34 AM   #2
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Here are a few websites with some good mods and tips

http://www.geocities.com/xt350pilot/

http://www.pbase.com/corky1/xt_350_project_bike
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Old 09-26-2007, 10:49 AM   #3
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For a rear rack try
http://www.cycleracks.com/

For a clarke 4 gallon gas tank try
http://www.justgastanks.com/makers.php?type=1

For moose guards, protaper handle bars, bar risers, heated grips, luggage, etc try
http://www.happy-trail.com/
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Old 09-26-2007, 12:10 PM   #4
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Corky has some decent info, but nothing like what is needed, seems these XT's are getting more poplular.
Saw one go on fleabay for a hair over 2500.00 2000, 2000 miles, it was a nice specimen. Oh, this was just a day or two ago.

I can help out a bit, I have wrenched enough on mine to help others out.

For a good daigram and part numbers, start here
http://www.xtremepowersports.com/OEM...oem_parts.html





Mine. '99 all stcok, runs like a champ and 8300 miles
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Old 09-26-2007, 12:17 PM   #5
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Truckin, you know of a way to protect a saddle bag across the rear of the bike from the muffler?
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Old 09-26-2007, 05:01 PM   #6
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Quote:
Originally Posted by Burtonridr
Truckin, you know of a way to protect a saddle bag across the rear of the bike from the muffler?
You'll have to make yer own frame, make room for an aluminum heat shield.
Thats the only way.
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Old 02-29-2008, 09:55 PM   #7
FatboyXT
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Here are somethings I did to help the suspension a little...remember there isn't much you can do with out spending big bucks!

Front forks...Tear down, clean, refill with a good 15wt oil and use about 330cc of oil. Stock is 10wt at 319cc. Then I run about a 2" spacer for a little more preload. To much preload and your front end will be skating around. More oil helps with bottoming, thicker oil helps with slowing down the travel (rebound to). I run the forks flush with the top triple clamp. A set of stiffer springs would make a world of difference. No air for those of you with air caps.

Rear Suspension. Not much I could do there. I did move the clip on the spring to its lowest position to get a little more preload. From what I have seen on most XT's is that the clip that holds the top of the spring in place is in the middle of the three possible positions. A stiffer spring and better valving is needed here.

My goal is to find a cheap TT and swap suspension.
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Old 02-29-2008, 10:04 PM   #8
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My 2000 XT. Just a decent little enduro bike. Light duty pretty much, but I rode mine all over Colorado a couple of summers, and just had to be careful I didn't bottom the soft rear shock. I did a few changes to mine. I highly reccommend changing the front brake hose out to a stainless braided hose. Those big long fat rubber brake hoses are robbing you of half the brake's power. After the first trip to the mountains, I regeared it with a 3 tooth larger rear sprocket. It has Kenda Trackmaster tires on it. Great for the dirt, a bit slippery on pavement if you're leaning it over a lot, but they are street legal. First thing I did was replace the mirror with an Acerbis, install the Maier handguards, and pull those huge turnsignals off and mount up the little mini's.
I always thought the 2000 was a nice looking bike.




13,000 ft near Monarch, Colorado. First trip out there with it. Geared too tall for this type of riding.


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Old 03-01-2008, 07:25 PM   #9
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Jetting the XT can be a little tricky because of the dual carb setup.

First off drill out the plug over the mixture screw.

Then shim the needle up with a washer, one of the sites suggest getting the needle from a TT350 since it has the grooves and circlip to adjust it with.

Then I purchased another pilot jet and with those tiny drill bits I drilled out the pilot jets one step at a time until the screw was at 1.5 to 2 turns out and it was running a little rich, then I went back to the last size(that is why you buy a second one).

Be careful with the adjustment for the butterfly on the secondary carb. If you go to far the thing will run great in the mid to upper range but it will not idle.

I have heard about people messing with the springs and airjet on the CV slides.

It doesn't hurt to open the airbox a little and the exhaust too. I have a Cobra exhaust which really opens it up and saves a few pounds. Problem is that it is too loud. So right now I am running the stock exhaust with the screen out.

It starts very easy when warm and takes only a couple of kicks when cold.
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Old 03-02-2008, 02:36 AM   #10
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Do you guys know if the TT350 and XT350 share intake manifold boots? I just picked up an 86 TT350. As far as I know the motor and carbs are the same, I'm curious what the actually changes were from the TT to the XT (obviously the electrical system). I'm searching for a few used parts.
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Old 03-02-2008, 12:17 PM   #11
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On Tomichi Pass, Colorado.

2000

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Old 06-02-2011, 03:25 PM   #12
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2000 picture

2000

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Old 03-02-2008, 07:15 PM   #13
Burtonridr OP
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Quote:
Originally Posted by FatboyXT
No air for those of you with air caps.....

Rear Suspension. Not much I could do there.....
What do you mean no air?

You can actualy get an aftermarket rear spring for the xt350, check out the first few posts in the thread, one of the links I posted will get you to it.... I think it is the xt350 page that has some mods on it.
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Old 03-02-2008, 09:59 PM   #14
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TT vs XT350

The primary gearing is different between the TT and the XT, the oilpump has a nylon gear on the XT, metal on the TT. The airbox flows much better on the TT. I believe the intake valves and perhaps also the cam is different. And I thought the carb is slightly larger on the TT. All that gives you about 3 HP more on the TT.
The trick with the carbs is to get the 2 carbs more balanced. On the TT the stock jetting is 122 primary/125 secondary. I run 118/120 on my TT. I also run a ported head and a K&N filter. I did go back to the stock exhaust many years ago beacause of noise, and also found out that the bike was actually easier to ride on singletrack in the woods. The powerband is much smoother and broader, and it's in stealth mode.

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Old 03-03-2008, 06:38 AM   #15
Burtonridr OP
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Quote:
Originally Posted by TTKlaus
The primary gearing is different between the TT and the XT, the oilpump has a nylon gear on the XT, metal on the TT. The airbox flows much better on the TT. I believe the intake valves and perhaps also the cam is different. And I thought the carb is slightly larger on the TT. All that gives you about 3 HP more on the TT.
The trick with the carbs is to get the 2 carbs more balanced. On the TT the stock jetting is 122 primary/125 secondary. I run 118/120 on my TT. I also run a ported head and a K&N filter. I did go back to the stock exhaust many years ago beacause of noise, and also found out that the bike was actually easier to ride on singletrack in the woods. The powerband is much smoother and broader, and it's in stealth mode.

TTKlaus
So can you swap the carb and air box off the tt and put it on an xt?
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