NE5 valve cover leak @ cable mount

Discussion in 'Whizzer Motorized Bicycles' started by likemyspoiler, May 5, 2008.

  1. I have a Whizzer NE5 & has oil leaking from valve cover where cable mounts to mech. that goes through cover for compression release. I just removed engine to plain .070 from cylinder head, ported exhaust, opened up intake restrictor & advanced cam timing one tooth. I also replace valve cover with new cover & gasket. also installed new breather hose that came with cover to repair oil leak. I just got bike back together. It runs awesome, BUT leak is still the same! Still leaking oil out of compression release mechanism. Has any body had any similar problems. It seems weird that new cover would leak just the same, but I don't know what else it could be. Also motor has 125 mile on it.

  2. RdKryton

    RdKryton Active Member

    What oil are you using? Anything other than straight 40wt could cause that problem.

  3. bill green

    bill green Member

    howdy clean off oil and run on center stand then see if its from gasket , shaft or casting pin hole in cylinder. hope this helps . Bill Green Vancouver Whizzer
  4. Quenton Guenther

    Quenton Guenther Motored Bikes Sponsor

    If it isn't the oil, then remove the compression cover, take to hardware store, find the correct size "O" ring that will be very snug around the cam, but not too large that it pinches between the cam and the bottom of the cylinder. On a few older motors [WC-1] I ground a small groove on the cam to hold "O" ring in place against the plate. The "O" ring will help seal the "clearance" between the cam and the hole in the cover.
    125 miles? Easy! Just a quick comment, "I break in my motors easy, and they never fail to light-up when asked". Your motor will have a lot more power after another 200 or 300 miles [and less oil pressure], you will be surprized.
    Have fun,
  5. I am using hd 30 motor oil. The oil is coming from compression release shaft. The original cover leaked the same. My wifes 2005 NE5 doesn't even have seepage from shaft. I like the oring idea Quenton, but I thought with new cover the problem should have been corrected. I thought about switching covers from my wifes bike to see what happens. I was just afraid of destroying gasket. Thanks for all the input! It has beed an agravating problem
  6. RdKryton

    RdKryton Active Member

    You need to get the 30wt oil out and use only 40wt. The lighter oil will find any way out it can. Until the engine is broken in, it will have high crank case pressure. After about 500 miles it should be broken in. Please try 40wt and see if you still have the problem.

  7. KilroyCD

    KilroyCD Active Member

    RdKryton most likely hit the nail right on the head. You need to use straight 40 weight oil - no lighter, synthetic or multi-viscosity oils in these engines.
  8. I wanted to run 40wt, but I am having a heck of a time finding it. However my wifes bike just turned 100 miles & its dry everywhere. 40wt oil may slow it down, but I can't imagine the leak will stop. I rode it today & I actually got some oil drops on my left foot. Its not gushing out, but its bad enough. I however was impressed with the power difference with the upgrades I did, but when I got home from roadtest, it really took the wind out of my sails when I saw the brand new cover leaking! Where is everyone buying oil? I checked our local wallmart & all local auto parts suppliers. (I am auto reapair shop owner) I was so surprised how hard of a time I am having to find it! Thats why I have 30wt in it. Thanks for all the help! Dan
  9. KilroyCD

    KilroyCD Active Member

    I got Valvoline straight 40wt oil at my local NAPA auto parts store. It was the only variety of straight 40wt they had. They only had one row of it on the shelf, and I almost missed seeing it. Best thing to do is ask at your local parts shop.
  10. SPJ

    SPJ New Member

    You should be able to find heavier weight motor oils at airports where light aircraft are serviced.
  11. Quenton Guenther

    Quenton Guenther Motored Bikes Sponsor

    I live in a small fishing village on the east coast of NC, and usually can't find most things, but oil isn't one of the items. I have purchased 40 Wt oil at Advance auto parts, Napa auto parts, K-mart, grocery stores, Ace hardware, etc. Another place to look is a motor cycle shop. Maybe they shipped all the 40 Wt oil here, who knows. I would check with the local parts store and see if they can order it for you. RDKryton is correct, the 40 Wt will stay in the motor longer than 30 Wt or multi-grade [worst]. As the cylinder adapts to the rings [break-in] the crankcase pressure will drop some [can take as long as 500 miles]. Some motors break-in faster than others because of the clearance of the cylinder to piston ratio. I have never had 2 motors break-in the same, and each must be treated as different. I have invented several ways to stop the flow of oil through the vent at high RPMs [over 8800 RPMs] and still allow the crankcase to vent correctly.
    Have fun,
    Last edited: May 6, 2008
  12. RdKryton

    RdKryton Active Member

    Another thing to look for.

    Hi again Dan
    You should make sure the bolts and nuts that hold the cylinder to the crankcase are tight. I just saw a little oil on mine in the same area you have your leak and found that the bolts and nuts needed to be snugged back up. After that the next ride was dry. No oil leak. Just something else to check and good luck on the 40wt oil search. Don't give up on that. These engines were designed for 40wt and with the hot weather on the horizon it will be more important that you get the heavier oil in there.
    Take care

  13. MoonKS

    MoonKS Member

    Hi Dan,

    In an earlier post of mine I echoed the same problem I had finding 40wt oil. I live in the largest city in Kansas (500,000) and there are literally auto parts stores every half a mile or so - not one of them (Advance, AutoZone, O'Reillys, Pep Boys...etc.) had 40wt oil. I wound up finding mine at the local hardware store.

    Good luck with your oil and getting your leak resolved.


  14. peter nap

    peter nap Member

    I find it at Advance Auto and Autozone.
  15. MoonKS

    MoonKS Member

    Quenton wrote:

    "I live in a small fishing village on the east coast of NC"

    Sure Quenton...rub it in why don't ya!!! :grin:

    Matthew in Kansas....
  16. Thanks for all the input. As soon as I can change the oil out with 40wt I will. I sure hope this takes care of it! I'll let you all know. Thanks again, Dan