Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature currently requires accessing the site using the built-in Safari browser.
We noticed you are blocking ads. DO THE TON only works with community supporters. Most are active members of the site with small businesses. Please consider disabling your ad blocking tool and checking out the businesses that help keep our site up and free.
I'm having a problem with gas getting into my engine and fouling up my oil. I think it might have something to do with the carb float level. Here are some problems I am noticing.
1.) Starts and runs well from a cold start, idles fairly well, could be adjusted though. Once bike warms up, it doesn't want to idle in neutral without giving it a bit of throttle ever 5 seconds.
2.) Gas smell in oil res.
Also...If the carb was getting too much gas, how come I have not noticed it coming out of the carb overflow tube?
I am going to start out by changing the oil and seeing if I still get a fouling issue.
Assuming that you haven't made any changes in exhaust or air flow, check the overflow tube for any internal blockage. If none, check the condition of the float valves. They might be wearing out and need to be replaced. Also, check the tolerances of the floats themselves and making sure they are not bent out of shape as well. See if any of that works. And since you are already working on the carbs, mind as well clean them as well. Hope this helps. I'm a newb at it, but these are things I have read about on other forums pertaining to carb work. Also, search out WDCarbs via google. Might help out there as well.
Sorry, forgot to state in the original post the the carb is not the stock carb. It was put on by the previous owner. Also looks like its got a K&M airfilter on there as well. I'm not home right now so I'll get back to you on the brand of the carb. But for now.....
I also have the Clymer manual but its pretty vague when its talking about taking to actual measurement. It does not actually tell you where to measure from.....and to where? Top of the actual round float to the alum. bowl casing?
I have the manual as I stated above. The original petcock is more or less just by-passed. I don't see how a leaky petcock would cause oil fouling in the engine???
The petcock by itself, no. But if your carbs are taking too much gas and your petcock won't turn off, then yes.
First of all, don't start the engine until you change the oil. Either your float is junk, your float needle is dirty, or the float needle is upside down. All of which will stop the gas before it pours into the cylinder. As far as it not coming from the overflow tube......that one is kinda up to you. Most likely clogged somewhere or pinched shut.
I'll post pictures of the whole set-up Tuesday. I work nights and tomo I have to be in NYC at 11AM so tomo is shot. I will resume, like I said Tuesday.
Very interesting ideas were posted and I appreciate that!
I've been really busy lately and unable to get pictures taken. I'll try to later tonight and also get the actual carb model and brand post up as well.
I did however change the oil in it today. While I was doing this I was thought of two questions.
1.) Could the gas in the oil problem be eliminated by adjusting the fuel/air mixture on the actual carb? Obviously, its sending in way too much gas, but that could explain why fuel is not leaking out of the overflow tube (its not clogged)?
2.) If I had to get into the actual float bowl could I just leave the carb on the engine and just remove the float bowl? I would disconnect the fuel to carb and drain the bowl via drain screw?
Well, that certainly is kind of an odd carb. Is it a Mikuni clone?
If your engine is running, there's no way that gas will flood into your oil. Unless it's running super rich and it's a long term affect. Usually it's from the overflow being clogged and your float is letting gas come in all the time (with the downward angle of the carb, it pours into the cylinder).
Yes, to pull the float bowl off all you need to do is remove the screws. Drain the float bowl first and turn the petcock off. Speaking of which, why is there another valve after the original petcock? It shouldn't be needed unless your petcock is broken.
You need to take the carb off of the motor in order to set the float height.
Factory manual will have the heights listed that you need, Cylmer isnt always the best for this type of tuning.
Like it was said fuel in the oil will not happen with a running engine unless there is a massive compression loss.
Fuel in the oil is one of two things,
1
petcock leaking.
2
wrong float height
either or both can cause it. overflow could be clogged or its just slowly leaking into the motor.
Either way be careful because the oil will thin out and not lubricate the motor right and can cause alot of other damage
I would bet that the carb is a clone.
I would also assume that it has the wrong size jets in it but that would not cause the oil in the fuel. The jets will be a different issue you will have to deal with. Also be very careful working on the carb as i have heard that clones strip when trying to change jets.
And also you will almost never get it tuned with that pod, but again not the prob right now
And whats up with the two valves?
when they are "off" NO fuel comes out?
Well, that certainly is kind of an odd carb. Is it a Mikuni clone?
Yes I believe it is infect a Mikuni clone. Yeah, the engine runs, I can ride it around. I really don't want to though because I do know that gas in the oil will def thin out the oil and cause damage. I guess I really just have to take the carb off check the height.The valve after the original petcock is the new petcock since the original one was bypassed (its left open all the time, fuel shut off is regulated by the valve after that, the new petcock).
HOLY SHIT!! Small world!!! I did not buy the bike off Larry. I bough it off a guy named John that lives here in Providence, Rhode Island.
The seat on there now is actually a skateboard deck. What can you tell me about the machine? What kind of carb set up did you have on there? Is that a velocity stack?
Nice work on the paint, its holding up real nice, however the right side case cover is chipping up. What paint did you use on the engine? Body?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
