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Thread: Steel hose in oil cap, thoughts?

  1. #21
    Join Date
    May 2009
    Location
    Florida
    Posts
    4,620

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    Quote Originally Posted by Grimly View Post
    It sprays out but not a deluge. Just enough to be a nuisance, and of course a danger to engine longevity if it goes on long enough.
    a little louder too.
    1983 GS 1100 Guided Laser
    1983 GS 1100 G
    2000 Suzuki Intruder 1500, "Piggy Sue"
    2000 GSF 1200 Bandit (totaled in deer strike)
    1986 Suzuki Cavalcade GV 1400 LX (SOLD)

    I find working on my motorcycle mildly therapeutic when I'm not cursing.

  2. #22
    Join Date
    Mar 2013
    Location
    South Central Kentucky
    Posts
    367

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    Quote Originally Posted by tatu View Post
    Thinking about this, how do you measure to a figure like negative 3br? I understood that once a vacuum is achieved that's it there would be nothing left to measure and that would be zero.
    I imagine that the rings suffer because the vacuum lowers the boiling temperature point so that the efficiency of the oil is changed massively, rings rely on mist to lubricate and a vacuum would surely affect that especially in a hot engine?
    Just asking, not challenging.
    The ring flutter is interesting
    I have installed several Wiseco kits and they recommend different end gaps for the 1st top ring and the 2nd ring they say is causes less ring flutter....004 per inch of bore top .005 per inch of bore 2nd ring I have seen race motors that were the pistons were ported causing almost total seal but excessive ring wear.The compression forced the rings against the cylinder walls through the small ports (holes)..All the vacuum pumps I have seen were on mainly Pro Stockers, Pro Mods.. I have mainly seen your set up with the oil cap breathing also but only in like funny bike.Some Pro Mod.But no advantage on a stock bore motor..Sounds like the motor had excessive blow by and this might have been a temp. fix..Never know ...
    Last edited by gs11ezrydr; 09-06-2020 at 11:28 PM.
    82 gs1100ez 1168 Wiseco,Web .348 Cams,Falicon Sprockets,Star Racing Ported Head,1mm o/s Stainless Valves,APE Springs,Bronze Guides,etc.APE Billet Tensioner,36CV Carbs,Stage 3 Dynojet,Plenum w/K&N filter,Trued,Welded,Balanced,Crank w/Katana rods & Billet left end, FBG backcut trans, VHR HD Clutch basket,APE nut,VHR High volume oil pump gears,1150 Oil cooler,V&H Megaphone header w/Competition baffle,Dyna S,Coils,Wires,etc.Other misc.mods.

  3. #23
    Join Date
    Mar 2013
    Location
    South Central Kentucky
    Posts
    367

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    Quote Originally Posted by 80GS1000 View Post
    I've been advised that the big bore kit (1100 cc high compression Wiseco pistons) may be causing the gaskets on my GS1000 engine to not seal correctly due to higher than stock crankcase pressures. I've been blowing gaskets & seals left and right since getting the bike back on the road after a number of years in storage, leading to oil leaks. The stock breather may be inadequate for this application.


    So, one of these clutch cover mounted crankcase breathers is now on its way. Now need to source and mount an oil catch can....or maybe just put a filter on the end of the braided hose. We'll see.

    I went as far as replacing pistons and rings on a 1000 that kept pushing out the rubber cam plugs and valve cover gaskets..Still did it...I finally attached a K&N filter to the breather hose off the valve cover.Improved it dramatically.
    82 gs1100ez 1168 Wiseco,Web .348 Cams,Falicon Sprockets,Star Racing Ported Head,1mm o/s Stainless Valves,APE Springs,Bronze Guides,etc.APE Billet Tensioner,36CV Carbs,Stage 3 Dynojet,Plenum w/K&N filter,Trued,Welded,Balanced,Crank w/Katana rods & Billet left end, FBG backcut trans, VHR HD Clutch basket,APE nut,VHR High volume oil pump gears,1150 Oil cooler,V&H Megaphone header w/Competition baffle,Dyna S,Coils,Wires,etc.Other misc.mods.

  4. #24
    Join Date
    Nov 2015
    Posts
    30

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    Quote Originally Posted by gs11ezrydr View Post
    ... I have seen race motors that were the pistons were ported causing almost total seal but excessive ring wear.The compression forced the rings against the cylinder walls through the small ports (holes)..All the vacuum pumps I have seen were on mainly Pro Stockers, Pro Mods.. I have mainly seen your set up with the oil cap breathing also but only in like funny bike.Some Pro Mod.But no advantage on a stock bore motor..Sounds like the motor had excessive blow by and this might have been a temp. fix..Never know ...
    You are describing "gas ported pistons", found on many modern motors.
    Total Seal now make "ported rings"
    https://www.youtube.com/watch?v=oYQ9...ature=youtu.be

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