The XL600 thread

Discussion in 'Thumpers' started by Gregster, Jul 6, 2007.

  1. brucifer

    brucifer Long timer

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    Ivan, as near as I can tell with a tape measure, the left crankcase is 3 inches or maybe just a hair under.

    I don't have a cover off at the moment to measure the other dimension for you. Hopefully someone else can.
  2. 12120

    12120 Indenturedx5

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    Anybody ever try one of these? Acerbis LED Vision HP Light kit [RS214421000. Wondering if it is a bunch better then stock lighting? Brighter light with fewer amps always ok! :clap
    Chris
  3. Ivanych

    Ivanych Ivanych

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    Thank you Bruce! :clap
    This is good news, the thickness of the left crankcase XR500R = 75 mm.
    I think 6 mm sitting in the stator cover.
    I'm very waiting for confirmation from having the opportunity to measure the cover!:norton
  4. RFVC600R

    RFVC600R GOT SAND? NO!

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    New seat cover makes a night and day difference!!

    <a href="http://s1163.beta.photobucket.com/user/Dracus121/media/IMAG0264_zpsb3348bed.jpg.html" target="_blank"><img src="http://i1163.photobucket.com/albums/q558/Dracus121/IMAG0264_zpsb3348bed.jpg" border="0" alt="Photobucket"/></a>
  5. crobox

    crobox Been here awhile

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    There are two "tubes" on the carbs that are a bit mysterious to me. I'm hoping someone can help me figure out what to do with them....

    [​IMG]

    A: If you blow air into this tube it comes out somewhere inside the main body of the carb. I have seen pictures of other bikes where this tube is just capped off with something like an automotive vacuum cap. Is that the right idea?

    B: Air blown in here also comes out in the carb, actually from the little hole that's visible about an inch to the left of the red oval in this picture. However, I have no idea what to do with this one.

    ??

    Thanks
  6. brucifer

    brucifer Long timer

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    Christian, A as I recall, is an overflow and B is the float chambers vent. Best to leave them both open. :D
  7. 12120

    12120 Indenturedx5

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    I never had K270 on frt, but have had one on rear for about 2 yrs now. Short ride to work and back almost everyday. A few rides in the woods also. I think they do pretty darn good in the woods for not being a true knobby. Also seems to be wearing like iron. It even has a few post work back parking lot burn outs on it, and still better then 50%:clap Have not had it in sand yet.

    Chris
  8. RFVC600R

    RFVC600R GOT SAND? NO!

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    Sorry about asking about the K270s

    as it turns out, I'm already running them, They're so worn out I didn't notice the tread pattern! I should read the tire next time i get a new bike :D

    <a href="http://s1163.beta.photobucket.com/user/Dracus121/media/IMAG0268_zpsc8d63272.jpg.html" target="_blank"><img src="http://i1163.photobucket.com/albums/q558/Dracus121/IMAG0268_zpsc8d63272.jpg" border="0" alt="Photobucket"/></a>

    And i'm putting on the 'new' gas tank too

    <a href="http://s1163.beta.photobucket.com/user/Dracus121/media/IMAG0269_zpsb0792800.jpg.html" target="_blank"><img src="http://i1163.photobucket.com/albums/q558/Dracus121/IMAG0269_zpsb0792800.jpg" border="0" alt="Photobucket"/></a>

    I put some good ole' desert sand in the tank and shook it a bunch. I just got done rinsing all the sand out of it and next will be some rust remover. already looks alot better, but it wasn't that bad to begin with :D
  9. Stretchah

    Stretchah Been here awhile

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    Happy New Year Guys

    Since I got the XL I've had intermittent starting problems and after replacing and sorting out quite a few of the porevious owners errors and lack of maintenance, it seemed to be getting better. I then noticed that the compression seemed to be really strong sometimes and hardly there on other occasions. I was thinking it may be a valve issue and the other week the bike died a few times on the way home and lost compression so took the AA for the rest of the way.
    I dropped the engine out and yesterday i finally had the time to strip it down and here's what I found:

    [​IMG]

    The intake valve seats seem to have sunk and one has broken up :eek1

    You can see the amount of sinkage better on this one

    [​IMG]

    Thankfully it looks like I haven't lost any of the seat into the barrel and the piston looks fine:

    [​IMG]

    I've also checked over the cams, cam chain, sliders and Rockers and everything else looks fine, so, hopefully once I've got new valve seats and valves fitted all should be good. There's a local firm that specialise in working on older single cylinder bikes including Xls, so, thinking I'll get them to fit the seats and new valves and then I'll put it back together myself to keep the costs down.
    Let me know if there's anything else worth doing while I'm at it?
  10. Homerb

    Homerb Been here awhile

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    If you've gone this far, l'd pull the cylinder and check it and the piston for wear. You don't want to get it all back together, only to find your compression is still dodgy. A new set of rings and a hone wouldnt cost much or go the whole hog and rebore and a new piston.
  11. Stretchah

    Stretchah Been here awhile

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    Cheers Guys, that makes sense at least then I know it's all 100%, definitely don't want to have to pull it apart again any time soon :)
  12. RFVC600R

    RFVC600R GOT SAND? NO!

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    Chasing oil leaks again

    I'm weeping from the kickstarter and the starter decompressor lever on the right side case.

    Where can I get those seals??:D That'll be next weekend's chore.

    Today I'm finally changing the seals in the forks. All Balls Racing seals and Maxima Fork oil. New battery going in too!

    [​IMG]
    I can't wait to get offroad again! That's where my heart is.
  13. brucifer

    brucifer Long timer

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    Stretchah, the exhausts are kinda problematic on these but I don't think I've ever seen an intake that sunken. You got very lucky you caught this thing before those exhaust seat pieces fell out.

    I agree with the other posters who said to pull your cylinder. I would measure it and also check to make sure it's round.
  14. Duken4evr

    Duken4evr Been here awhile

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    A few action shots from my '83 XL, from back in the day. Bought a blown up XR500 and stole the suspension off that and bolted it on the XL. Rode the hell out of that thing, never found a bike that was easier to wheelie for long distances. Could pick it up in 1st and change gears at the balance point, all the way to 5th. It had controllable solid torque lazily and solidly delivered. For me anyway, the thing was squid wheelie magic, and I like doing those Have owned faster harder hitting lighter bikes including my current '10 Husaberg FE450 (which is a sweet up to 1/8 mile wheelie bike), but nothing came together for doing endless literally miles long monos better than that old XL. As a result, it was constantly in wheelie mode :evil

    [​IMG]

    [​IMG]

    "Urban Air". Had to clear the speed bump on landing. Full squid mode with tennis shoes :lol3

    [​IMG]

    Mammoth Mountain. The XL was very competent off road, really good in rocks and gnarly terrain. Just stay away from whoops and don't drop it. Kinda heavy to pick up.

    [​IMG]

    Stalwart bike, had about 40,000 miles on it when I sold it, as I already had a street bike and wanted a pure dirt bike, and was afraid of getting thrown in jail! The XL is such a friendly and yet capable "let's misbehave, what could go wrong" kinda bike. Bought it for $1,250 rode the hell out of it for probably 6 years, sold it for $1,500. She was good to me all the way :rofl
  15. Stretchah

    Stretchah Been here awhile

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    Brucifer, I'll agree with that, definitely lucky :D I'm going to pull the cylinder and get it checked out and honed - makes sense.

    Moparmanpete, Good spot, I hadn't noticed that, but, if you look at the close up below you can actually see the end of the wire from the helicoil....best get that checked too

    [​IMG]

    Duken4evr - Nice pics :)
  16. MentalGuru

    MentalGuru Crazy Diamond

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    It looks like it was running lean which would cause the exhaust seats to be an issue.


    Lean... Look at the eXhaust valve color.

    [​IMG]



    This is the color the exhaust valves should be.

    [​IMG]


    :freaky
  17. brucifer

    brucifer Long timer

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    Running lean or the valve lash too tight--as in no lash.
  18. Stretchah

    Stretchah Been here awhile

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    Neither would surprise me, I've had it about 2 months now and had issues with it all the way. When I got it the valve covers were chewed up and done up so tight I needed 2 extension bars to get them undone! Didn't seem like the valve clearances had been done for ages and there were some tight ones :eek1

    The jetting will be looked at after too as it's running an FMF pipe, so, want to make sure everythings spot on...
  19. bnjgriffin

    bnjgriffin stoked mostly

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    Carmel, CA.
  20. 12120

    12120 Indenturedx5

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    So anybody done the swap to 43mm forks? I was wondering if it is really worth it? Other then finding a set of forks. Is there a set of triple clamps that swap without to much trouble? Tips, advice, better ideas? :D Don't really do a lot of offroad, but thought it would be cool to have the XR swingarm and shock, and some bigger forks to match. Anyway hit me with your experience in this area.:thwak