| Author | Message | ||
     Gowindward |
Come in the shop this morning and she leaking oil after a ride on Sunday. Looks like dripping on the bottom of the carb, so I figure it is the rocker box gaskets. They are most likely the originals. Dang it!!! Any other ideas before I tear into it?  | ||
| Buelliedan |
As long as you are in there might as well do an NRHS 1250 kit, stage 2 headwork and some cams  | ||
| Essmjay |
From here it looks like it is leaking from the timing hole plug not from up above. | ||
| Hootowl |
There's no standing oil behind that timing plug, so I don't see how it could leak that much oil from there with the bike shut off. Usually oil leaks from bad rocker box gaskets happen at the exhaust side, since they're lower than the intake side. Strange. The oil in the timing plug valley would seem to indicate that it came from directly above. Maybe someone is playing a dirty trick on you. | ||
| Essmjay |
Yes, normally no standing oil, but I have used a clear timing plug before and there is plenty of oil flying around back there when the motor is running. Is there any way that it could fill with oil behind the plug if something else went wrong? At the least, I would pull the plug and look. | ||
| Essmjay |
Loren- do you actually see oil on the bottom of the carb or are you just extrapolating from the location of the oil? | ||
| Gowindward |
I checked the bike yesterday because I have been having just a small amount of oil there over the last year. It has been kind of a mystery, but not ever enough to worry about finding the source. It looked okay yesterday. Bike has been sitting in the same place since I wheeled it back in the shop Sunday evening, with no one else around to prank me. I did put a small snug turn on the timing plug, but it does seem all up hill for the oil to be coming out of it while the bike is sitting on the side stand and not running. Under the rocker box covers look dry. There is some signs of oil around the front cylinder base and up on to the cylinder up to and on the first cooling fin. The carb does have some oil on it and had a drop hanging from the bottom of it. Vent tubes are both run to the rear of the bike with an exit at the rear fender. Grrrr!!! Guess I will clean it up and let it idle in place and see what shows up again. (Message edited by gowindward on March 10, 2015) | ||
| Gowindward |
The forward bango fitting is loose! That must be the source! | ||
| Hootowl |
That oil looks really clean/clear to be coming from the spooge drain. Huh. | ||
| Gowindward |
True, but not really seeing another obvious source. | ||
| K12pilot |
Top push rod tube orings.. been there | ||
| Mhlunsford |
so if you pull the rocker gaskets go ahead and pull the pushrod tubes and replace the seals at the same time. I just did the 1250 kit and now pushrod seals are leaking - so ordered the collapsible push rod kit from nrhs - there is billet plate for the bottom pushrod seal - looks like it will seal better. | ||
| Two_seasons |
the only "bango" I know. Not sure about his "forward fitting" though   hope you find the leak! | ||
| Jolly |
Mine was leaking like that and I was convinced base gasket.... Turns out it was the chinsy base for the push rod tube assembly, fixed the leak by "upgrading" to the NRHS (actually a zippers product) collapsible push rod tube assemblies, MUCH better product than stock!! I did a full photo write up when I did it, I've since done it to three more bikes and getting ready to do a 4th... Parts are sitting on the work bench. | ||
| Gowindward |
I replaced the seals on the banjo bolt breather fittings with copper crush washers and the leak seems to be gone. Glad it was a simple fix! | ||
| Essmjay |
So does that mean you are losing that much oil through the breathers every time you park the bike? | ||
| Gowindward |
I sure hope not! I have the hoses from the breathers running up and over the heads. I guess there was simply some build up in hose and it all came out when the seal on the fitting failed and came loose. Time will tell. | ||
| Hootowl |
"I have the hoses from the breathers running up and over the heads. I guess there was simply some build up in hose and it all came out when the seal on the fitting failed and came loose." That's most likely what happened. And what that means is there was an oil plug in those lines and your breathers, well, weren't. Once oil gets past those umbrella valves, it begins a downward trip from which it can never return. It must be allowed to flow downhill to a catch can or to the intake. If there is an uphill run in the breather hose, oil will collect there, and plug the line. You see it done this way all the time too, even by manufacturers who make aftermarket breather kits. Best option is to put a T in the breather line, letting the oil flow down to a catch can, and the air flow up to the intake, or a filter. In theory, having the crankcase vent to the airbox puts the crankcase under a negative pressure, increasing ring seal, and reducing the very blowby that causes the splooge in the first place. | ||
| Firemanjim |
Or put XB rocker covers on---- (Message edited by firemanjim on March 16, 2015) |
