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  1. KnowFear

    LeMans III: off-idle throttle response is poor

    YESTERDAY: I started by installing the # 52 pilot jets. I synchronized the carbs, and had it idling nicely. Great. So next I went into the house, put on my gear and got ready for a test ride... after thirty minutes of despair, trying to restart the bike, I gave up. The bike would not run...
  2. KnowFear

    LeMans III: off-idle throttle response is poor

    Lowering the needles by one notch ruined the 1/4 to 3/4 throttle zone. Now I suspect that it is a pilot jet issue, or slide cutaway. Next experiment will be 52 pilots (gotta get some), or installing the 50/3 slides. I was pretty sure that I had a rich condition since the addition of choke...
  3. KnowFear

    LeMans III: off-idle throttle response is poor

    I'm running the Sachse distributorless ignition system, so nothing really to check other than the static timing. The carbs are in sync above idle, but I should probably redo the idle sync since I've been messing around with the idle mixture.
  4. KnowFear

    LeMans III: off-idle throttle response is poor

    I have a set of 50/3 slides that are a bit worn, would it be worth trying those before moving the needle? In fact, those slides came with the bike. I never put them back because the jetting the bike came with was all wrong according to the manual.
  5. KnowFear

    LeMans III: off-idle throttle response is poor

    I went to 265 atomizers, also adusted the idle mixture screws to 2 turns on one side, and 2.5 on the other, as per your suggestion. It seems marginally better, but not by much. Now, the engine rpm falls slowly when the throttle is fully closed. I have experimented by opening the choke at...
  6. KnowFear

    LeMans III: off-idle throttle response is poor

    Problem: the engine does not progress smoothly from idle, I need to blip the throttle several times to get the engine to rev past the progression area. It becomes annoying to get bogged down at most traffic stops. Once moving, the carburetion is great and the bike pulls very nicely all the...
  7. KnowFear

    Le Mans MKIII Jetting

    OK, just to clarify: if I remove 1mm from the bottom of my 60/3 slide then it becomes a 60/2?
  8. KnowFear

    Le Mans MKIII Jetting

    I have this problem on my LMIII with stock jetting. How do I do perform this procedure? Scribe a line, and then use a file?
  9. KnowFear

    oil leak at head gaskets -- warped barrels?

    The machinist removed @ .010" from the barrels. Seems fine now. I will update again after a few heat cycles.
  10. KnowFear

    oil leak at head gaskets -- warped barrels?

    UPDATE: I had a few hours last weekend to re-install the barrels/heads. Today I went for the first post-assembly blast, and NO oil leaks! Yahooo! Now on to the next project...
  11. KnowFear

    Spec for cylinder/barrel height?

    Does anyone have the specification for the cylinder/barrel height (sealing surface to sealing surface?) The machinist removed @ .010", but I would like to measure to be sure how much was removed. If anyone has a barrel hanging around that they could measure for me, that would also be highly...
  12. KnowFear

    oil leak at head gaskets -- warped barrels?

    OK, I'm making progress... Just got back from the machine shop. The barrel tops are definitely distorted. The distortion is in the form of an irregular convex shape to the barrel top. Both barrels have the same problem. Maybe the PO over-torqued the heads? Who knows. Anyway, they probably...
  13. KnowFear

    oil leak at head gaskets -- warped barrels?

    I will follow your advice this time around. However, having to do that after only one heat cycle still bothers me. How many riders take their NEW Guzzi back to the dealer after ONLY ONE ride to get the heads re-torqued? So basically, you ride it off the lot, go for a spin and immediately...
  14. KnowFear

    oil leak at head gaskets -- warped barrels?

    The head gaskets were not blown. Base and head gaskets, and all 12 o-rings, were recently replaced. After @ 300 miles and 6 or 7 heat cycles, the cylinder heads were re-torqued, yet the leaks persisted.
  15. KnowFear

    oil leak at head gaskets -- warped barrels?

    OK, I removed the heads and barrels this weekend. Both head gaskets show signs of oil leaking from the oil return passageways via the head gaskets. The heads had been machined flat during the rebuild, which makes me wonder if the tops of the barrels aren't flat. I'd better get them to a...
  16. KnowFear

    Torque heads: lube or no lube on threads??

    Thanks everyone. My new head gaskets just arrived, so I'll be getting to it soon. John - thanks for the copper coat link. Chris
  17. KnowFear

    Torque heads: lube or no lube on threads??

    Hey guys - thanks for the input. I have stuck with the manual re torque value of 30 ft-lbs. I'm a little nervous going to 35 ft-lbs. At this point should I try that, or should I replace the head gaskets and start from scratch?
  18. KnowFear

    Torque heads: lube or no lube on threads??

    I am unsure if I should be using lube or not on the head stud threads. When I assembled I did NOT lube them. I am experiencing an annoying oil leak from both head gaskets. This leak showed up after 5 or 6 heat cycles @ 280 miles from rebuild. I re-torqued at that point, oil leak did not go away.
  19. KnowFear

    Another new member...Le Mans IV Reconstruction..

    Yes - that is the correct way to remove the piston. It comes out fairly easily. The retaining ring is simply a press fit into the bore.
  20. KnowFear

    electronic ignition , what's your feedback ?

    I have the Sachse unit, and I have been very pleased with it. Absolutely no problems. Volker Sachse was very responsive to questions, and he very quickly made up a new rotor that I needed to use it in combination with my Ducati Electronica alternator.
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