1983 Tempter 650

Discussion in 'Old's Cool' started by Drover, Aug 21, 2011.

  1. Drover

    Drover Adventurer

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    Hi i recently purchased 2 1983 Suzuki Tempters one with a blown motor and one that has been sitting since 89. Changed the oil/plugs and checked the carb bowls (spotless) on the one that has been sitting and it runs great but i know its missing a bit when its idling. I rode the bike around for 15 km and checked the plugs and they looked very white. I'm thinking there is a problem with the carb? Not sure what else could cause this?

    Any help would be greatly appreciated.

    [​IMG]
    #1
  2. Mista Vern

    Mista Vern Knows all - tells some.

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    Don't know squat about this model, but are the plugs you are using the correct heat range, are the float bowls set at the proper level, and is the timing set correctly? Other than that, and using a little Seafoam or Techron in the gas, I got nothing.
    #2
  3. zap2504

    zap2504 Dave E.

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    Check for air leakage through the rubber intake manifolds (spray with WD40 or starter fluid; engine RPM should not change).
    Check that it has a good/working air filter.
    Check that the two removable machine screws (for carb synching) are in place and not leaking.
    Check that the vacuum line for the petcock is not leaking.
    Given all that, you probably will need to disassemble/clean the carbs; you will probably have gunked-up jets/passages/emulsion tubes not allowing proper fuel flow.

    Will need to re-set idle mixture for both carbs and re-sync after cleaning.
    #3
  4. Drover

    Drover Adventurer

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    Check for air leakage through the rubber intake manifolds (spray with WD40 or starter fluid; engine RPM should not change). - done
    Check that it has a good/working air filter. - done
    Check that the two removable machine screws (for carb synching) are in place and not leaking. - done
    Check that the vacuum line for the petcock is not leaking. Wasn't there replaced it and bike is still missing
    Given all that, you probably will need to disassemble/clean the carbs; you will probably have gunked up jets/passages/emulsion tubes not allowing proper fuel flow. Carbs are spotless,

    Only thing i can see is maybe syncing issue? even exhaust is blowing hotter on one side


    #4
  5. vtwin

    vtwin Air cooled runnin' mon

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    Drover, make sure the original foam filter is in place and oiled. These bikes run really lean and don't want more air that it can handle. They are also really cold blooded and run poorly cold, I know mind does, again probably lean again. Mine will surge at 3500-4K when cold.
    #5
  6. Airhead Wrangler

    Airhead Wrangler Long timer

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    I don't know anything about the bike in question except for the fact that it might have the goofiest name ever given to a motorcycle with the possible exception of the Yamaha Enticer.
    #6
  7. vtwin

    vtwin Air cooled runnin' mon

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    Everywhere else in the world calls it the GR650, but we got stuck with Tempter.:huh
    #7
  8. Drover

    Drover Adventurer

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    Never checked to see if its oiled. And i certainly have noticed that she is cold blooded, no good to try and move the bike without letting it warm up properly. Might change out the coil just for the hell of it seeing i got 2 spares on the other bike. Will report back tomorrow when i check the air filter.

    It has a small leak in the cross pipe under it any chance the back pressure could do this? hmm maybe not would be missing on both sides....

    BTW i was always a fan of the enticer, well until i got a big boy skidoo.
    #8
  9. fishkens

    fishkens Long timer

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    There's a secret cabal of marketing schlubs who just knew they'd sell 18 more bikes if they gave it a sexy (?) name. We're fools for that stuff. :lol3
    #9
  10. radianrider

    radianrider Adventurer wanna'be

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    Oddometer:
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    Might try adjusting the mixture screws. Sure sounds like it is running lean. Screw them in until they just touch, then back them out 2.5-3 turns as a starting point. Run it and adjust as needed.

    They may still be capped on your bike. Go here http://www.mtsac.edu/~cliff/storage/gs/Mikuni_BS-CV_Carburetor_Rebuild_Tutorial.pdf for good directions for drilling them out.

    How did you get it running without the vacuum line to the petcock? Running on Prime setting?


    Check out thegsresources.com The GR is a very close 1st cousin to the GS series and they are very helpful folk.

    A lot of great help on http://members.dslextreme.com/users/bikecliff/
    #10
  11. Drover

    Drover Adventurer

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    Ran the bike on prime. Worked fine until it was miss and i could hear a poping coming from where this line was suppose to be hooked up. After a bit of research i realized what it was for and why i couldn't get gas to run out when it was in on/res position.

    If i could get that one side it run a little more rich it would be great, could use the bike without worrying about burning a hole down through the pistion or doing any intenal damage.
    #11
  12. Drover

    Drover Adventurer

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    So went to check the air filter and noticed it was completly black and when i went to clean it, it just fell apart and crumbled in my hand... So scrap that idea....then i decided to see why i didnt have good back brakes, took it all apart and full of rust and brake pads completely gone...Scrap that idea... Moved on to see why the exhaust is so loud and come to the conclusion that all the gaskets in each of the point that it all connects are gone. Again another idea scrapped

    Right now i'm looking to get air filter and the gaskets are these items readily available? any place online? Do the filters come with the metal cage or just the filter medium itself.
    #12
  13. vtwin

    vtwin Air cooled runnin' mon

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    Drover, the air filter is one piece, pretty pricey iirc, about $69? But it'll be the last one you need. Some have reused the frame and bought sponge filtering material and glued it onto the frame. Parts are available from Babbitt's Online. I got my brake shoes there and the air filter. Connect a vacumn line from the petcock to the spare vacumn port on the left carb.
    #13
  14. Mista Vern

    Mista Vern Knows all - tells some.

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    Let us not forget the Funduro.
    #14
  15. Drover

    Drover Adventurer

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    Ordered a new filter today $76 bucks from the dealer. About the same as online just a little quicker shipping.

    But on a brighter note tempter is running a hell of alot better. Checked the spark plug gap and one side was almost no gap what so ever, also found that the carb boots were on the wrong sides :lol3 oops lol. Not missing at all anymore and waay more responsive. Still seems to be running hot though on that 1 side, checked the mixture screws and both are around 2 3/4 turns. Which way would i go to make it run a bit richer?

    Also dealer tells me there is no gaskets in the exhaust aint there suppose to be?
    #15
  16. Drover

    Drover Adventurer

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    Also can anyone tell me how to open this?

    [​IMG]
    #16
  17. vtwin

    vtwin Air cooled runnin' mon

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    You've a got a the rare Suzuki locking chain. Needs a special magnetic key I believe.
    #17
  18. radianrider

    radianrider Adventurer wanna'be

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    Turn the screw counter clockwise to allow more gas flow.

    The key to the chain looks like a bottle cap with a wire frame sticking out on the side.
    #18
  19. zap2504

    zap2504 Dave E.

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    Did you check valve clearance? If the valves are too tight you can get a too-hot cylinder.
    #19
  20. radianrider

    radianrider Adventurer wanna'be

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    That is true and it is more important to the life of the bike long term.

    Assume that air injection tubes are attached and have no cracks?
    #20