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  • Users: KnowFear
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  1. 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...
  2. 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...
  3. 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...
  4. 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.
  5. KnowFear

    LMIII - head gasket leak

    I have put about 285 miles on my LMIII after an extensive refurbishing. Heads were stripped, new guides, etc. Everything assembled with new gaskets, seals o-rings etc. It runs beautifully. Anyway, just after my last ride (@ 270 miles after new head gaskets), I noticed a light oil leak on...
  6. KnowFear

    which LeMans III mufflers SOUND the best?

    I'm considering getting either the Lafranconi Competizione mufflers, or the Mistral stainless reverse-cone mufflers. Anyone know how these compare? Are they excessively loud? I LOVE the sound of the Lafranconi Comp system on the LM I/II, so that is my benchmark.
  7. KnowFear

    LMIII with LM1/2 Lafranconis?

    I've seen a LeMans III with the upswept Lafranconi Competizione mufflers as fitted to a LeMans or LeMans II. Does anyone have experience with this fitment? Any advice appreciated. I love the sound of those mufflers. The Lafranconi competizione mufflers meant for the LMIII don't look as nice...
  8. KnowFear

    where can I get a Gaman seat for LMIII?

    Moto International says that they are no longer listed. Has anyone seen one, or know of one, for sale?
  9. KnowFear

    LeMans III nearing completion!

    Hey gang, here is a photo of my LeMans III nearing completion. I'm just waiting for the fairing from the paint shop. Once I install the fairing, add a license plate, and do a few safety checks, it will be ready for a road test! Thanks to everyone and their help! I love this forum.
  10. KnowFear

    LeMans III -- securing the fuel tank?

    My LMIII is almost ready for the road, after a six month refurbishment. There was no fuel tank hold-down strap when I got it. How is the fuel tank secured? A photo would be really nice!
  11. KnowFear

    LMIII + Dellorto flat tops: which throttle cables?

    I would like to convert my LMIII to the flat carb tops. I tried making throttle cables this afternoon, but it was a failed attempt. If I'm going to buy some, which Guzzi model do I choose? I'm using a Tomaselli 2C throttle.
  12. KnowFear

    "directional" oil seals

    Calling all oil seal experts! The rear main seal is "directional" - i.e. there is an arrow in same direction as the crank rotation. I just noticed tonight that the transmission input oil seal also has an arrow in the same direction as the crank rotation. My problem is that the oil seal kit I...
  13. KnowFear

    rear main seal -- do I replace it?

    1983 LeMans III with @ 19,000 miles: The engine & transmission are apart to install deep-spline clutch. Do I replace the non-leaking main seals while everything is apart? If "yes", then how do I remove the engine's rear main seal?
  14. KnowFear

    camshaft timing marks & chain tensioner question

    I just replaced the OEM camchain adjuster with the aftermarket unit as source from MG Cycle. I noticed that the camshaft sprocket was 1 chain roller out of alignment according to the marks on the cam gear and crank gear. Easily fixed, but I'm wondering how this must have affected the engine...
  15. KnowFear

    cleaning my barrels...

    I've removed the barrels and pistons on '83 LeMans III with @ 20,000 miles. The bores look pretty good and the cross-hatching is still clearly visible. The exteriors of the barrels need a good cleaning to remove oxidation. If I clean them with some mag wheel cleaner (acid-based) will I risk...
  16. KnowFear

    Bevel Box: replacing the drive flange (splined thingy)

    If I need to replace the bevel box's drive flange (thingy with splines)..... does this involve re-shimming the gears during reassembly? In other words, can a reasonably competent person (me) do this job, or do I need to send it out to an expert? I read Pete Roper's bevel box rebuilding...
  17. KnowFear

    LeMans III - how to remove the cush drive plate?

    I'm not sure if my cush drive plate is stuck, or if I just don't know the trick to remove it. Should it just pull straight off? (I'm referring to the "flexible coupling disc" as described in the parts manual - the plate with driven splines attached.)
  18. KnowFear

    LeMans III -- fork oil capacity?

    My Haynes manual specifies 120 ml for the LeMans I fork oil capacity. Does the III take the same amount?
  19. KnowFear

    LeMans III -- RED -- is there a paint code?

    Just wondering if someone has the red paint code for a LeMans III.
  20. KnowFear

    LMIII top-end refresh question

    I am about to dive into disassembling and inspecting the barrels and heads on my recently acquired LMIII. The odometer shows 18,896 miles, but there is certainly more since the speedo cable was broken and probably has been for some time. Maybe 25,000 miles for a conservative guess? Both head...
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