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Old 12-27-2012, 09:50 AM   #3211
SkidMarx
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Location: Ortonville, MI
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Your cam chain guides may be worn too much also. If the guide the tensioner pushes on is worn down too far, the chain will never be tight enough.
The chain shouldn't sag at all with tensioner pushing on it. Did the tensioner release from its lock position?
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Old 12-27-2012, 09:51 AM   #3212
jan.van.gent
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To replace the cam chain, I probably have to open the cluth cover, remove the piston/cylinder,... to get to the lower sprocket, or am I mistaken? Can I replave the chain by only removing the valve cover?

Maybe by splitting the old chain (is this possible, like for a normal chain?), connect one side of the old chain to one side of the new chain, turning the sprockets until the new chain comes back to the top, remove the old chain from the new one, and close the new one.
Any idea if this is possible? Should I also replace the sprockets? They seem in rather good condition (but so does the cam chain...)
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Old 12-27-2012, 09:53 AM   #3213
jan.van.gent
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Quote:
Originally Posted by SkidMarx View Post
Your cam chain guides may be worn too much also. If the guide the tensioner pushes on is worn down too far, the chain will never be tight enough.
The chain shouldn't sag at all with tensioner pushing on it. Did the tensioner release from its lock position?
Yes it did release!
And as I said, when I turn the engine, 99% of the time the tension is OK in my opinion, no slack at all. But at one position, there is a lot of slack (see at the picture).

The bike has 28.000 km's.
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Old 12-27-2012, 01:53 PM   #3214
NordieBoy
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Location: Kiwiland
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Quote:
Originally Posted by jan.van.gent View Post
To replace the cam chain, I probably have to open the cluth cover, remove the piston/cylinder,... to get to the lower sprocket, or am I mistaken? Can I replave the chain by only removing the valve cover?

Maybe by splitting the old chain (is this possible, like for a normal chain?), connect one side of the old chain to one side of the new chain, turning the sprockets until the new chain comes back to the top, remove the old chain from the new one, and close the new one.
Any idea if this is possible? Should I also replace the sprockets? They seem in rather good condition (but so does the cam chain...)
Valve cover, cam sprockets, cam chain guides, clutch cover, clutch, primary drive sprocket on crank.
Then you can remove the cam chain from behind the crank sprocket.

Still waiting on the gaskets and lock washers to button mine back up again...
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Old 12-31-2012, 08:41 AM   #3215
imroc
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Hey all! New owner of an old '87 XT350 and very little riding experience. Looking mostly to ride around in the sage brush & dirt (some sand) along with my kids. Eventually i would like to take them on simple mountain trails when we gain a little proper training & experience.

I'm 5'9" ish, about 175 lbs & weight lift, run, etc. Are there any changes you may suggest to this seemingly stock bike? I should also mention that we'll be riding at elevations of 7500-9000 feet. So far all i've thought about were handguards and, if possible, LEDs to replace the current lights.

I was going to simply purchase motocross gear as well.

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Old 12-31-2012, 08:45 AM   #3216
kwakbiker
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looks fairly good condition, first check should be the condition of the carb to head rubber boots as they degrade over time
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Old 12-31-2012, 08:47 AM   #3217
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Also, I'm going to error to the safe side and presume that the bike hasn't been service thoroughly in a very long time, if at all. Aside from simple plug, oil and filter, what other things should I have a qualified tech look at and change? Fork oil? Rings?

Just looking for direction...

Thnx
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Old 12-31-2012, 08:49 AM   #3218
imroc
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Quote:
Originally Posted by kwakbiker View Post
looks fairly good condition, first check should be the condition of the carb to head rubber boots as they degrade over time
Great! Thanks, that's the kind of suggestions I'm looking for!
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Old 12-31-2012, 09:28 AM   #3219
kwakbiker
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yep normal service items plus valve shim clearances and get some grease on the swingarm/shock bearings. Wouldnt be to worried about rings unless smoking or drinking oil.
Quote:
Originally Posted by imroc View Post
Also, I'm going to error to the safe side and presume that the bike hasn't been service thoroughly in a very long time, if at all. Aside from simple plug, oil and filter, what other things should I have a qualified tech look at and change? Fork oil? Rings?

Just looking for direction...

Thnx
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Old 01-04-2013, 05:25 AM   #3220
Rasmustur
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Quote:
Originally Posted by SkidMarx View Post
Hey!, you have a pic of mine in there too.

As payment for the use of my photo, you will need to keep collecting and taking usefull pix of the XT350 and it's innerds.
I have bookmarked that page and will be checking it often (especially when I forget what something looks like on the inside).
Will do
Very cool version of the xt350!!!! Where did you get the front and rear fender from?

BR
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Old 01-04-2013, 11:19 AM   #3221
SkidMarx
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Quote:
Originally Posted by Rasmustur View Post
Will do
Very cool version of the xt350!!!! Where did you get the front and rear fender from?

BR
Rasmus
98 YZ125.
Front fits fine if you space the back 2 bolts with a washer or two. Rear is actually just a small piece of the yz fender(back 1/3 maybe). Had to do some work with a heat gun to make it fit. I was able to attach it in 4 places so it's not going anywhere. I the rear I used had been torn off in a crash so I got it for nothing.
I cut up the OEM plate holder and mounted a LED tail light.
That pik was the last time it looked that good. It's due for a major freshening up.
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Old 01-09-2013, 03:53 AM   #3222
Lenz1
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TT 350 rebuild - inlet tract mods

Hey guys

Got a few pics of the modified inlet setup on my TT350 project.

Brief summary: Angled inlet manifolds, straight pipe for carbie joiners and filtered air pipe, 2 layer oiled foam air filter (UNI Australia),

http://i1074.photobucket.com/albums/...ps86b066c1.jpg

http://i1074.photobucket.com/albums/...ps8c21f0d4.jpg

http://i1074.photobucket.com/albums/...ps090ebe3a.jpg

http://i1074.photobucket.com/albums/...psc7ce54fe.jpg

http://i1074.photobucket.com/albums/...psaf6c5500.jpg

http://i1074.photobucket.com/albums/...pse040af51.jpg

Lenz1 screwed with this post 01-09-2013 at 04:14 AM
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Old 01-10-2013, 01:35 AM   #3223
NordieBoy
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Was thinking about pod filters for my DR400F but need more water protection.
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Old 01-10-2013, 05:10 AM   #3224
Lenz1
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Quote:
Originally Posted by NordieBoy View Post
Was thinking about pod filters for my DR400F but need more water protection.
Heavy rain or a solid splash across these oiled foam air filters doesn't put the fire out or cause problems that I have experienced - but I'm not big on deep water crossings that you may be fine with.

An airbox inlet under the seat (probably as good as it gets as far as height goes) is only ~ 100mm above the height of these air filters.
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Old 01-10-2013, 03:02 PM   #3225
Zecatfish
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The weakest links on the XT350 engine,
1. Timing chains are not long life items. They stretch bad. I had to replace mine at about 10k miles.
2. Timing chain tensioner.
3. Intake boots.

I've you an complete YZ490 chassis beside the shop,
I'm actually thinking about putting my XT350 engine in it,
Would solve all the weak links of the XT350 chassis.
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