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oil throwing hypercharger

Discussion in 'Motorcycle Tech Talk' started by piglet, Aug 18, 2005.

  1. piglet

    piglet New Member

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    I have a 2000 Hugger that has been upgraded to a 1200, so much work/money and so dissapointing! After the 1200 kit was installed problems developed, resulting in changing heads and everything to 1200. I had a kuryakyn hypercharger installed = nothing but oil on all of my chrome and clothes! This problem has been on going now for four years! Is there any help? I have tried bypass lines (rubber hoses), then metal line over the top (that clogged), rubber hose going along swingarm to rear spokes on my wheel! Help! Some of the best in Ohio have failed to find answers....
  2. CD

    CD Guest

    Slow down a second. First, the Hypercharger doesn't throw oil. It just cannot get rid of the excess oil coming out of your breathers.
    Head breathers (nose bleeders), both BT and XL have displayed problems with excess venting of oil from the first year. We had so many problems we developed products to help reduce or eliminate it. However, when there is a large amount of oil being vented there is obviously usually something else is wrong. You say you have experienced problems since doing the 1200 conversion right?

    Before the conversion did you have oil venting problems? Was the Hypercharger installed then? Often troubleshooting is best done by starting at the beginning and going forward to the point where a problem begins.

    The Hypercharger itself is not causing the venting problem it cannot handle the excess oil is all.

    You would be surprised how many people over fill their oil tanks. Check valves seep, weep and some outright leak and being a dry sump engine oil collect down in the sump area. A lot of riders check their oil like a car and "top" off their tank before riding thinking it is a good thing. I suggest breaking that habit and check the oil after the end of the ride BEFORE leaving the bike for the night etc. If the oil is at the correct level you have no need to add any oil. If you check it in the morning out of habit and the oil is low and there is no big puddle....Where else did it go besides the sump? Fire the bike up for a couple of minutes, shut it down and check the oil again. IF it sumps up consistently, have your wrench check it out. The reason that the oil level is critical is because of the differences in height of the engine vent tube in the tank. If the vent tube is even 1/4" lower than spec a lot oil will just be circulated from the return line to the tank and back out the vent to the engine. If you are way overfilled it can pressurize the tank and blow the cap off. Most often, you have extra oil frothing around in the crankcase whipping up the air into an oily mess and there is no way the stock breathers can handle even with vent extensions. Oil comes out as a heavy mist, joins with the normal standoff cone of fuel / air at the carb and mixes it. The now wet and very thin concoction we call spooge runs out of the air cleaner, hits the air stream, the gas evaporates and you have an oily mess. Try reducing the oil level a pint. You can pull it out with a turkey baster very easily.

    Please get back to us with some specifics.

    1. Exactly when did the problem begin? Were there changes done? What was changed? All at once?
    Last edited by a moderator: Aug 18, 2005
  3. bikerjim1

    bikerjim1 Moderator

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    Yeowwww...CD! Are your fingers on fire? That's gettin' down to business....I'm curious to see how this turns out! :eek:
  4. piglet

    piglet New Member

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    next idea

    Thanks for the reply! I am a little old lady that pays dearly to my wrench
    only to be confused and disappointed! :)
    First off, I like the looks and preformance improvement using the
    hypercharger. I tell em it has to stay.
    Some head work and 1200 kit was installed along with the hypercharger in
    2000 on the 883Hugger. Blow by oil was a problem. Many trips to wrench and
    the oil slowed.....almost stopped.
    Then this spring it had a great deal of oil around the rocker box gasket.
    The wrench opened it up and said it could not be saved, bent valve.... New
    1200 cyl, pistons & valves installed, new wrench changed "junked up blowby
    oil lines" ----- major blow by problems now! I have 600 miles on the new
    work and the thing is impossible to ride...... The oil level is not over
    filled.
    Everyone keeps hoping that is the problem.... NEXT ---The compression
    is -a ok- as well. I saw a new chrome bypass system listed in kuryakyn
    catalog, will this help or even fit?
    Thanks for the reply! I am a little old lady that pays dearly to my wrench
    only to be confused and disappointed! :)
    First off, I like the looks and preformance improvement using the
    hypercharger. I tell em it has to stay.
    Some head work and 1200 kit was installed along with the hypercharger in
    2000 on the 883Hugger. Blow by oil was a problem. Many trips to wrench and
    the oil slowed.....almost stopped.
    Then this spring it had a great deal of oil around the rocker box gasket.
    The wrench opened it up and said it could not be saved, bent valve.... New
    1200 cyl, pistons & valves installed, new wrench changed "junked up blowby
    oil lines" ----- major blow by problems now! I have 600 miles on the new
    work and the thing is impossible to ride...... The oil level is not over
    filled.
    Everyone keeps hoping that is the problem.... NEXT ---The compression
    is -a ok- as well. I saw a new chrome bypass system listed in kuryakyn
    catalog, will this help or even fit?
    Thanks for the reply! I am a little old lady that pays dearly to my wrench
    only to be confused and disappointed! :)
    First off, I like the looks and preformance improvement using the
    hypercharger. I tell em it has to stay.
    Some head work and 1200 kit was installed along with the hypercharger in
    2000 on the 883Hugger. Blow by oil was a problem. Many trips to wrench and
    the oil slowed.....almost stopped.
    Then this spring it had a great deal of oil around the rocker box gasket.
    The wrench opened it up and said it could not be saved, bent valve.... New
    1200 cyl, pistons & valves installed, new wrench changed "junked up blowby
    oil lines" ----- major blow by problems now! I have 600 miles on the new
    work and the thing is impossible to ride...... The oil level is not over
    filled.
    Everyone keeps hoping that is the problem.... NEXT ---The compression
    is -a ok- as well. I saw a new chrome bypass system listed in kuryakyn
    catalog, will this help or even fit?
  5. CD

    CD Guest

    Piglet,

    Your post was confusing :confused: so, let's start again. Please answer the questions in order as well as you can.

    1. Were you experiencing problems of venting oil at all prior to the 888-1200 conversion? This would include all riding conditions.
    2. Was the bike completely stock at the time?

    After the conversion, what caused to mechanical problems and what were they? Please be specific as possible.

    You say you do not over fill the tank? Not to argue but how do you know exactly how much is in the bike now? If you have a 1/2qt in the sump and you change the oil and refill to the mark, you now have 1/2qt excess oil in your bike. That excess has to go somewhere and somewhere is usually out the crankcase vents. In the 13+ years of the head breathers, we have encountered this time and again.

    Compression does not tell all of the story about ring seal. A leak down test tells much more about the amount of air that is getting past the rings and into the crankcase. The more that is in the crankcase, the more that has to get out. That air mixes with the oil and goes out the vents. The more the air, the more the oil mixed into it.
  6. piglet

    piglet New Member

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    First off, thanks for helping!

    In response to your questions:
    Blow by oil was not a problem until the hypercharger was installed
    The 1200 kit was installed before the hc
    first change- came the 1200 kit = no oil blown on my leg
    second change - hypercharger = oil being thrown on my leg
    The scooter ran great and the blow by oil almost quite for the next four years. Then oil showed up around the rocker box gaskets. The new wrench tore it apart and told me it had a bent valve and everything needed replaced. He installed 1200cyl, pistons and valves. He said he ran a compression check and it was fine. Piglet had oil coming from the rocker box again! He replace that gasket. The other box leaked oil, he replace that gasket. Now, no oil is coming from rocker box.Oil is coming from from the rubber drain lines behind the hypercharger. These hoses were changed to a smaller line in hopes of stopping the leak, that did not help. The oil does not seem to be foaming.This leak is enough to cover my jeans and shirt after a ten mile ride. The blow by oil once again is a problem.
  7. hotroadking

    hotroadking Super Moderator Staff Member

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    1) Hypercharger isnt' causing problem more than likely something else when wrong around the same time, such as overfilling or, you have a checkball that is letting oil seep into the cases as CD said, so it's always overfilled. The statement that it was ok then sat a while then you rode it in the spring and lots of oil came out support this theory

    2) Did you have problems with the bike running at all? Lots of valvetrain noise? I don't see how the wrench diagnosed a bent valve for oil blowby again unless a pushrod gave out or something went wrong.

    It seems to me you've had to go through a lot

    1) Stock bike was OK
    2) First 1200 was ok
    3) add hypercharger then oil (I think what ever happened occured at the same time and the original filter could hold more oil)


    Do you have the original air filter and box, put them back on and see if it reduces the oil (it may change the time to pants soaking by oil as they are more restrictive.

    I think adding more "parts" may just lighten the wallet and be masking the problem.
  8. Seahag

    Seahag New Member

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    I don't know if this will work with your sportster, but if you have a CV carb, I don't see why it wouldn't.

    My hypercharger came with this spacer that mounts between the air cleaner and the carb. any oil that exits the head breathers is routed to the spacer (not the aircleaner) where it is then drawn in to the carb and combusted in the engine. I don't know how much I may be losing to the head breathers, but I usually drop about 1/2 quart or so every 3000 miles on my bike. Another tip I got from reading Donny Peterson's tech line in American Iron magazine was that they drill out the head breather bolts about one size bigger whenever they do a big bore to allow the heads to breathe a little better. I did this to my breather bolts and while I can't tell you for sure if it really helped, I can tell you that it certainly doesn't hurt and it was easy to do.

    Heres a link to look at that spacer between the air cleaner and carb.
    http://www.kuryakyn.com/products.asp?bn=harley&ci=2358

    Good luck with your problem.

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