The XT550 Thread: Info, Stories and Mods Inside!

Discussion in 'Thumpers' started by XTwarrior, Feb 16, 2010.

  1. XTwarrior

    XTwarrior My bike is older than me

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    Thanks a bunch! I'll update the first post to reflect the new info :D






    ---- I was thinking, I noticed there is a line going from the oil reservoir to the top of the valve cover. I assume this would mean it would drain from the oil reservoir to the valves? If so, I've been noticing that my oil reservoir is empty after rides. This would lead me to believe that the reservoir isn't filling properly for some reason. I don't see any visible leaks that would take pressure out of the system, and I have confirmed I do have oil pressure at the oil filter. I'm thinking maybe a pinched/clogged line somewhere? Is the main return line for the oil reservoir the line that goes up the front of the frame?

    Thanks for all help, I'm just annoyed at this whole dry sump thing right now :puke1
  2. Zecatfish

    Zecatfish XTique Rider

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    you better check your oil level and make sure its not burning it.
    That line is actually a return line, if you start the bike with it off it will blow oil everywhere. :lol3
    Don't ask.

    I kept thinking my XT was not returning it, and it was because it was burning/blowing it past the rings. Thus the reason I did the TT600 engine swap. The bike never obviously smoked like it was that bad. It was just sucking it past the rings.
    Cause: Hyper cooling of the cylinder in a DEEP creek crossing on a hot summer day.
  3. XTwarrior

    XTwarrior My bike is older than me

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    I think 1 quart in 20 miles would be slightly obvious; I hope. I don't see smoke at any point in time when running this bike. Even after sitting almost a year I had no smoke.

    I also can never seem to get a good reading in this bike. So I never know if I am low or not. To give insight, 2 years ago when it was my DD it only used 3/4 a quart over 3,000 miles. It had a case leak which probably attributed to some/most of the consumption, Motor is only 11,000 miles old.
  4. newt_sr

    newt_sr "Get off!" ...Walter

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    So uh, nevermind about the question on the starter plunger. :baldy I just bought a new one. Have you guys/gals seen the bikes on Facebooks' Yamaha XT 550 Fan Club? Makes ya wonder what kind of access to parts that they have (other than the custom work done). I want one of those seats.
  5. Zecatfish

    Zecatfish XTique Rider

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    There is a check ball in the system that if stuck open will effectively turn your drysump engine into a wet sump engine. I thought I had that sort of issue going on till I really figured out it was actually that LOW on oil.
    you might find more about it on the XT600 thread, thats where I was discussing it.
  6. newt_sr

    newt_sr "Get off!" ...Walter

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    Ok, let's try a new question. I just installed a new Hella halogen headlight to replace the dim sealed beam. It came with a 60W/55W H4 bulb. The sealed beam is rated at 45W/40W. I have ordered a 45W/45W H4 (closest thing I could get to 45W/40W). What would happen if I run with the 60W/55W H4?:kboom
  7. Zecatfish

    Zecatfish XTique Rider

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    Nothing,
    I'm running a 50/55w H4 in mine, Baja Designs headlight. :freaky
  8. XTwarrior

    XTwarrior My bike is older than me

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    With clean grounds you shouldn't have an issue with hot wires from the extra juice, and also cleaning up all the grounds would reduce stress on the whole charging system :1drink I need to re-clean mine as I haven't touched them in 2 years and they are starting to rust a bit.
  9. XTwarrior

    XTwarrior My bike is older than me

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    And now for another question; those in the know, would kicking the engine over without the key in (to prevent firing) cause enough pressure in the system to push oil up the line to the reservoir?

    I'm thinking tomorrow that while I have the bike apart I want to test all the lines for possible blocks, namely the return line for the reservoir. I need to know that oil is circulating properly before I do the 150 mile ride Saturday. Nothing like breaking down/seizing 75 miles from home. Just trying to think about how to test it without having the bike running.
  10. newt_sr

    newt_sr "Get off!" ...Walter

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    Book says the bike takes 1.9 Qt. of oil. If you have the special tool to screw into the air bleed screw hole (on the oil filter cover), you're supposed to get between 1.42 and 2.84 p.s.i.. Book says that you can hook up a tube to the air bleed screw hole and loop it over your handle bars into the oil reservoir and that the oil pressure should be enough to pump up to the oil reservoir.
    I'm thinking that if you're just checking for blockage, unscrew the oil return line from the reservoir and kick away. IF nothing comes out, try firing the bike off and see what happens (short duration, of course). Have a friend look down the return line while doing this. Er, make that a jerk friend that you're trying to get rid of. :lol3
  11. XTwarrior

    XTwarrior My bike is older than me

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    Haha, that's what I was thinking (about the return line, of course :deal ). I know I have pressure from loosening the screw on top of the filter area while running, so now I need to verify it is circulating correctly.

    Anyone have a service manual for this bike? Can't find them anywhere.
  12. XTwarrior

    XTwarrior My bike is older than me

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    Some new stuff. Regarding the XT shock mod I am attempting, I didn't get it done today. I have a rough mock picture showing what we are going to do. It isn't pretty, but since the shock is mostly hidden no one will notice. Furthest right is the XZ550 shock. We cut it 1" short so we are going to weld something up to make up for it.

    [​IMG]



    As far as the oil starvation sound; I noticed that the reservoir showed 3/4 today when I checked it before starting, so the system must be keeping some sort of pressure. Also, after about 5 minutes of riding, the starvation sound goes away even when idling. However, if you ride 3 minutes, then stop and idle, the sound will come back after a few seconds. Sounds a tad odd to me, not sure if the system just isn't getting the right circulation when the oil is cold? It definitely is circulating atleast into the reservoir since it has taken on a gray hue.

    Finally, I put something blasphemous on her today; 90/90-21 and wayyyy to much tire for the bike :lol3

    [​IMG]
  13. Zecatfish

    Zecatfish XTique Rider

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    Fixt.:deal
  14. G600

    G600 Been here awhile

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    :D:D Great stuff. :D:D
  15. netjustin

    netjustin b00b

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    Are those Contis? I'm thinking they are something new because I was only able to find 21" street tires by Avon. And they weren't even full street tires, more like 80%/20%.

    Not familiar with this oil starvation sound, a recording would certainly help. Is it possible that the valves are out of adjustment, and you're just hearing a clackety top end?
  16. XTwarrior

    XTwarrior My bike is older than me

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    Zecat, :lol3 I'm not thaaaat bad haha. I'd like to see me hit the sidewall on that rubberband I refer to as my front tire!

    G600, thanks! I'm thinking the rear shock and heavier fork oil matched to these tires will work great, I'm more concerned about braking power once I get those on. Not a whole lot of options for performance stopping on these bikes :cry

    Netjustin, They are Conti Race Attack Customs. I only found 3 online retailers carrying them and they are nowhere to be found even on continentals' site. However, I can very much attest to their existence. Just go to google search, enter Conti Race Attack custom 21 and search, then click on the shopping link and it brings a list up. I bought mine from Trax Motorsports. Not cheap at $125 shipped, but does what I need it too and wear should be less than normal on a lighter bike.

    Now I have to fix the fact that it is on backwards after my group ride tomorrow :rofl
  17. XTwarrior

    XTwarrior My bike is older than me

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    Also, it could be valves; what is the standard maintenance interval? I have about 3,000 miles on the engine since I checked the valves last time. My only fear would be that I didn't tighten the nut down enough. I seriously need to break into a dealership for a secret service manual for this thing.
  18. newt_sr

    newt_sr "Get off!" ...Walter

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    XTWarrior,
    Book says to adjust valves every 2500 miles after initial break in.

    9.4 ft.lbs. on the nut.

    Also, I read in another thread that it's possible to starve the top end if the down tube strainer is plugged. Might wanna give that a check.
  19. XTwarrior

    XTwarrior My bike is older than me

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    Alright, I'll have to look into it. Thanks for the torque spec too!


    The topend survived an absolute HAMMERING today on the PA backroads and turnpike, so I'm pleased with that. close to 200 miles total with only a 10 minute breather. Rode with a fleet of sportbikes and touring bikes, and was pushing a Ducati Monster through the corners :lol3 Only bike casualty was the heat guard on the header pipe rattled off, but we did have one rider go down on a Hayabusa.

    I'll post up pics when the group ride leader posts them up on the other forum :D
  20. newt_sr

    newt_sr "Get off!" ...Walter

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    XTwarrior,

    Be forewarned, according to the XT600 thread, the down tube strainer can be torqued to 65 ft.lbs. (referred to as 'nipple hose' in the book, I think). XTphreak said he had to use a strap wrench to hold the frame as he was wrenching the nipple hose/down tube fitting.

    Just so ya know, I ain't an expert by no means on this stuff. This happens to be something I need to do as well. I'm just repeating what I've read in these threads, and what I've found in the manual.