ADVrider

Go Back   ADVrider > Bikes > Thumpers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-30-2008, 06:36 PM   #241
cnj
Adventurer
 
Joined: May 2008
Oddometer: 70
Quote:
Originally Posted by johned206
Hey, FlyingFinn and J-Ball, thanks for the advice on the fork seal change. Things went smoothly and I got the job done. Reading the posts in this thread has got me thinking about doing the 520 chain conversion. Who out there has done it, where did you get the parts, and has it been worth it? I ride mostly fireroads and a little single track from time to time, very little time on the pavement. Thanks
Sprocket Specialists actually offers a 520 conversion kit for the XT350, but their rear sprocket is aluminum. I wanted steel for durability, so I ordered the Sprocket Specialists P/N 5133-15 (front), and from JT Sprockets, the P/N JTR845-41 (rear). The dash numbers of course, are the number of teeth. FYI-the 1984 Yammi XT250 (which came stock with a 520 chain, etc) has the same "attachment interface" for the rear sprocket as the XT350. No idea why they put a smaller chain on a machine with a larger engine.

cnj screwed with this post 10-31-2008 at 06:13 AM
cnj is offline   Reply With Quote
Old 10-30-2008, 09:08 PM   #242
tathambenjamin
Studly Adventurer
 
tathambenjamin's Avatar
 
Joined: Oct 2007
Location: Dekalb, IL
Oddometer: 563
520 conversion

Can someone give a brief synopsis of the benfit of the 520 conversion? I have read the whole thread and understand the majority opinion that the stock chain is "too small", but what does this mean in practical terms? Is to just too tight for full movement of the swingarm offroad or what?
__________________
There he goes. One of God's own prototypes. Some kind of high powered mutant never even considered for mass production. Too weird to live, and too rare to die.

-HST
tathambenjamin is offline   Reply With Quote
Old 10-30-2008, 10:46 PM   #243
cnj
Adventurer
 
Joined: May 2008
Oddometer: 70
Quote:
Originally Posted by tathambenjamin
Can someone give a brief synopsis of the benfit of the 520 conversion? I have read the whole thread and understand the majority opinion that the stock chain is "too small", but what does this mean in practical terms? Is to just too tight for full movement of the swingarm offroad or what?
Basically, the 428 chain is undersized for the torque of the 350 motor.....meaning more chain "stretch", faster wear, and likelihood of potentially breaking a chain damaging the engine case, etc. (all in the middle of nowhere). The 520 setup is simply more robust.
cnj is offline   Reply With Quote
Old 10-31-2008, 05:58 AM   #244
johned206
Adventurer
 
johned206's Avatar
 
Joined: Oct 2008
Location: Carbondale, Colorado
Oddometer: 26
Quote:
Originally Posted by cnj
Sprocket Specialists actually offers a 520 conversion kit for the XT350, but their rear sprocket is aluminum. I wanted steel for durability, so I ordered the Sprocket Specialists P/N 5133-15 (front), and from JT Sprockets, the P/N JTR845-41 (rear). The dash numbers of course, are the number of teeth. FYI-the 1984 Yammi XT250 (which came stock with a 520 chain, etc) has the same "attachment interface" as the XT350. No idea why they put a smaller chain on a machine with a larger engine.
Thanks for the information. My intention is to get the same size sprockets that you did, so one final question...What chain did you buy and from whom and how many links?
johned206 is offline   Reply With Quote
Old 10-31-2008, 06:11 AM   #245
cnj
Adventurer
 
Joined: May 2008
Oddometer: 70
Quote:
Originally Posted by johned206


Thanks for the information. My intention is to get the same size sprockets that you did, so one final question...What chain did you buy and from whom and how many links?
I just purchased the least expensive o-ring chain I could, as its tensile strength number was still significantly higher than the best 428 chain available to me. RK was the brand I believe. As for the links, I won't have access to the bike until Monday, so I'll have to get back to you. I purchased a 120 link and cut several links off. Also. I just clarified one of my previous posts involving the '84 XT250.....applicable to the rear sprocket only.
cnj is offline   Reply With Quote
Old 10-31-2008, 07:09 AM   #246
Grreatdog
Beastly Adventurer
 
Grreatdog's Avatar
 
Joined: Apr 2007
Location: Annapolis, MD
Oddometer: 10,356
Quote:
Originally Posted by tathambenjamin
Can someone give a brief synopsis of the benfit of the 520 conversion? I have read the whole thread and understand the majority opinion that the stock chain is "too small", but what does this mean in practical terms? Is to just too tight for full movement of the swingarm offroad or what?
Easy enough, the 428 chain was only marginally strong enough for a stock XT350. But I could at least get one to last as long as the rear tire. But once it was uncorked mine ate chains like candy. All it took was one serious hard offroad ride to stretch even the best 428 chain into junk. Which meant that it then started to eat the sprockets. Plus it broke the chain twice and destroyed a countershaft sprocket once.

Knobbies plus extra power were too much for that stupid minibike chain. I didn't know there was a 520 conversion when I had that bike or I would have gone that route in a heartbeat. As it was was, I simply replaced the chain as soon as it kinked or stretched beyond use. I quit buying o-ring chains and started using high strength regular chains because my bike ruined o-ring chains just as quickly as non o-ring. So it didn't make sense to pay more for an o-ring chain.

In my case, no matter what the 520 conversion cost, it would have been cheaper than buying so many chains. Not to mention ruined rides, a VERY ugly crash once and a busted engine case from chains breaking. In other words "too small" means not strong enough to handle the power and weight of an XT350.
__________________
525EXC, 640 Enduro, XT200
Grreatdog is offline   Reply With Quote
Old 11-01-2008, 05:25 PM   #247
mhaas
intrpd travlrwanabe
 
mhaas's Avatar
 
Joined: Jan 2006
Location: Easley SC
Oddometer: 184
Stock muffler?

Any one have a stock muffler sittin around they want to get rid of? My son needs to loose the Suppertrap on his 97 XT350. He will be doing assorted mods to make the bike his . But now its just too noisy.
mhaas is offline   Reply With Quote
Old 11-06-2008, 05:40 PM   #248
StuckXJ
Adventurer
 
StuckXJ's Avatar
 
Joined: Feb 2006
Oddometer: 61
How about a trade for the super trap?
-Steve
__________________
1989 Yamaha XT350
http://s323.photobucket.com/albums/nn479/StuckXJ/
StuckXJ is offline   Reply With Quote
Old 11-07-2008, 03:26 PM   #249
tathambenjamin
Studly Adventurer
 
tathambenjamin's Avatar
 
Joined: Oct 2007
Location: Dekalb, IL
Oddometer: 563
New Bike

I am supposed to go and pick up an XT350 on Sunday....was hoping you guys could give me some suggestions as to what to look for?

What would indicate if a valve adjustment has been done recently? Noises, starting symptoms, etc?

Mileage is 13k or so, what should I worry about/ look for?

Anything else you can suggest would be appreciated.....I will be sure to post some pictures afterward.....
__________________
There he goes. One of God's own prototypes. Some kind of high powered mutant never even considered for mass production. Too weird to live, and too rare to die.

-HST
tathambenjamin is offline   Reply With Quote
Old 11-07-2008, 03:41 PM   #250
nails1
nails1
 
Joined: Feb 2008
Location: New Mexico
Oddometer: 187
Quote:
Originally Posted by tathambenjamin
What would indicate if a valve adjustment has been done recently? Noises, starting symptoms, etc?
Oil leaks from the cover gasket

Valve clearance isn't hard to check and it seems to stay good for a long time.
nails1 is offline   Reply With Quote
Old 11-08-2008, 01:31 PM   #251
jegrmajstr
thumper tourer
 
jegrmajstr's Avatar
 
Joined: Aug 2008
Location: Slovenia, Europe
Oddometer: 135
Quote:
Originally Posted by tathambenjamin
I am supposed to go and pick up an XT350 on Sunday....was hoping you guys could give me some suggestions as to what to look for?

What would indicate if a valve adjustment has been done recently? Noises, starting symptoms, etc?

Mileage is 13k or so, what should I worry about/ look for?

Anything else you can suggest would be appreciated.....I will be sure to post some pictures afterward.....
Copy-paste, page 9... doesn't take much to read through the thread :
Quote:
Q:
I know the parts availability issues seem to be a problem but overall how dependable are these bikes and what kind of things can I look for when I go look at it that are bike specific.


A:
I don't know what do you mean with availability issues, because OEM parts are available at every Yamaha dealer, at least that's how it's here in Europe (and the XT 350 wasn't even sold in my country, but no problems with parts whatsoever). Aftermarket for the XT 350 isn't that good, but you can get some stuff (most of it listed above).
When you go and look at the bike listen to any weird noises coming from the cylinder head (I they are there, leave the bike) and if there are oil leaks at the gaskets, make sure that the bike starts, idles and revs ok, and check also if there is any delamination of the intake boots (common problem with the XT, especially older ones), ask if the bike has any service history (not likely, but it helps). Apart from those minor thins, the bike is quite solid and reliable (forks are crap though, but one can live with them), as long as you keep clean oil in, check the valves regulary and don't overheat it, it'll run forever.
__________________
The road becomes my bride, and the Earth becomes my throne...

'85 Moto Guzzi V65 TT (never heard of it?)

'93 Yamaha XT 350 Touroduro (sold & missed)
jegrmajstr is offline   Reply With Quote
Old 11-08-2008, 04:57 PM   #252
Csavargó
Industrialist-hippy
 
Csavargó's Avatar
 
Joined: Jul 2008
Location: A transient state
Oddometer: 152
Ok so my intake boot is shot. But the factory replacement is about $80 for a set. Pretty steep considering what it is. I was looking at it and the only thing that seems to be wrong with it is that it tends to lift off the boss thats bolted to the head. Is that supposed to be one piece with the boot bonded to the boss becasue i dont see how the boot would be held there securely otherwise. Right now the only thing holding it there is the force of the other parts pushing on it. (Not enough) anyway if such is the case i was thinking i would just bond the boot back to the boss.

Question 2. Turn signals. my turn signals do not work well. It would seem like they arent getting enough power. Even with a fresh battery and full charge they seem to come on at partial brightness but not blink. Also my light doesnt come on unless the engine is running. Is that normal. Is the battery circuit seperate from the signals and lights?
__________________
Master of the hobo arts!
Hajrá Fradi!!!!

1995 BMW R1100gs
1993 Yamaha XT350
1990 Suzuki VX800
2006 Brunton Stalker

Free GusGus Now!
Csavargó is offline   Reply With Quote
Old 11-08-2008, 05:15 PM   #253
Grreatdog
Beastly Adventurer
 
Grreatdog's Avatar
 
Joined: Apr 2007
Location: Annapolis, MD
Oddometer: 10,356
No headlight unless the engine is running. It runs off the stator not the battery.

Make sure you don't have a 6v battery with 12v turn signal bulbs. The dealer f'ed up and put a 6v battery in mine once and it did that.
__________________
525EXC, 640 Enduro, XT200
Grreatdog is offline   Reply With Quote
Old 11-08-2008, 05:31 PM   #254
Csavargó
Industrialist-hippy
 
Csavargó's Avatar
 
Joined: Jul 2008
Location: A transient state
Oddometer: 152
nope. Ive got 12v battery and a 12v bulb. but is the turn signal also tied in on the stator and not the battery?

Edit: Ha!! problem solved. I just had a faulty turn signal relay. Luckily i had a box of old KLR 650 parts lying around and the relay was interchangable.
Turns out the turn signals are driven off the battery but i guess thats pretty obvious to somone with working turn signals.

In other news i went ahead and bonded the the boots back to the aluminum boss. (perhaps Magnesium due to its lightness) I know its bad practice but its worth a try better than the $80 it costs for new boots. Hopfully the finish product will be an elegant fix.
__________________
Master of the hobo arts!
Hajrá Fradi!!!!

1995 BMW R1100gs
1993 Yamaha XT350
1990 Suzuki VX800
2006 Brunton Stalker

Free GusGus Now!

Csavargó screwed with this post 11-09-2008 at 01:50 PM
Csavargó is offline   Reply With Quote
Old 11-11-2008, 05:20 AM   #255
Mr Obsessive
n00b
 
Joined: Aug 2008
Oddometer: 1
Question Just bought a 97 (?) XT 350

The bike has a headlight only ,and I'd like to get her "lit -up" so I can put plates on it. Does anybody have a wiring diagram fer this critter so I can re-wire it? thanks! ps-whats with the tiny chain on these things? pps-will a wiring harness from a xt250 come close to working on this bike-just bought a "new" harness for a 250 off ebay...
Mr Obsessive is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 07:11 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014