Blurring engine

Hello, recently I built my bike and it has bin working perfectly. But a day when I was driving on whet road it started to burring (open air filter). The day after I was starting it and drive around and it worked normal, but after a while it started to blurr again and died after a while. I wait for some time started it in it runs normal again. Today I cleaned the carburetor and changed the filter. It's still blurr when I'm put on some throttle. I did notice that the gasoline crane whas leaking ass shit so I think the vacuum system in the crane has bil clogged from some rust. Can that be the problem so it overflow the carbs? I am out of ideas! Thanks for answering!

 

Blurring?

Leaking A$$ $h1t?

Do you mean it has diarrhea? Got some in your eye? That would make things blurry----

 

Fuel leaking from the carbs is a symptom of something being wrong with the floats, float needles, or float needle seats.

By burring I believe that you mean either backfiring or after firing ( combustion in the exhaust). That is due to a fuel mixture problem.

Combining those two symptoms leads me to beleive that it is time for you to thoroughly clean and service your carbs.

The Church of Clean

Also check out The Information Overload Hour (link in my signature).


Dave, our new friend is from Sweden; English really is hard (too many rules from too many other languages).

 

Haha don't misunderstanding me, my English is bad ass shit.. I don't know what the name is of the problem... But ass you say it's sounds like diarrhea!

 

Hey Saken87, does blurring = baktända?

 

I won't make fun of you, but I will let you know that "as" is a word used to compare things. "Ass" is the part of your body where the legs and torso connect. Or a male donkey.

A "badass" is someone or something that is awesome, tough, and maybe a little scary.

Truthfully, your English probably could be called "badass shit." It's gotta be tough, and it's awesome that you're trying. Don't be scared.

 

Thanks for answering. It's not backfiring but maybe afterfiering but I don't think that. It's just go's bad like 20 horsepowers has run away. know when a 2stoke goes bad and sound like a 4 strokes. More like the ignition is wrong. the carbs doesn't overflow buts the gasoline cran that's go on vacuum still puts out gasoline when the motor is off so I think that the crane is bad because of little rust. But how do ju lever the float? It's just flout up and stop the drain? How Du you adjust that? Bend the float arms ? The symptoms is coming back and forth so I don't think it's the ignition.

 

As Kmoe suggested, you really should read through the two forums listed below:

http://www.xjbikes.com/forums/threads/in-the-church-of-clean.14692/

http://www.xjbikes.com/forums/threads/the-information-overload-hour.27544/

 

We do have a few Scandinavian members. Posting in that section might get you in contact with someone who can better help with the language barrier.

http://www.xjbikes.com/forums/threads/sweden-or-nordic.45157/

 

sounds like your crane (petcock) is set to prime not on or res or leaking


http://www.xjbikes.com/forums/threads/rebuilding-the-yamaha-vacuum-fuel-valve-w-pics.25058/
to adjust the float you bend the tang just a little where it touches the valve at 1

 

Okey! The cran is leaking at on and res. And of course at prime where it should leak. I'm going to clean the carbs again and see if it works properly. If it's not I'm going to sync the carbs. Have to fix the cran also

 

Start your bike, let it run for a minute, shut it off and pull the vac line off the petcock. Is fuel there?If so the diaphragm has failed and fuel is being sucked into the head. My bike recently had the same issues you've described. I rebuilt the petcock about 3 years ago. A new diaphragm solved the problem. Hope this helps.

Gary H.

 

saken 87 just to help a little with your english it is not leaking it is flowing. leak, flow.
a leak would be from the edges where the screws and gaskets are flow would come out of the fuel nipple.
but if it is coming out of the vacuum nipple then the diaphragm is leaking letting fuel flow out of the nipple.

 

Yes sorry for that. It not leaking it's just normal flow from the mane nipple but also when it shouldn't be a flow. So something is wrong with the cran but I don't see why that who'd make the engine loose effect and not run normal. But maybe the mixtureing gets a little to fat ? Checkt the sparkling and they seems good. To bad that the gas tank is full...

 

if the diaphram inside the petcock (Crane) is torn you will be sucking fuel into the motor through the vacuum hose

disconnect the vacuum hose from motor and see if gas flows from that hose. or use a long clear hose to the crane vacuum nipple and suck on the hose to see if fuel flows through the tube.

you could also cap off the vacuum nipple on the crane and plug the vacuum hose to engine and see if things get better

you need to rebuild the crane or buy a new crane

 

Petcock Rebuild

 

exactly

 

Have done som test today. Pulled the vacline of and sealed it at the head and drive for a while but there was no different. Still runs unclean. Go's more clean at weary high rev. It's not leaking anything from det vacuum nipple on the petcock. I think that the diaphragm has bin clogged in an open position so the gasoline runs true whiteout the vacuum hose. But I will fix the petcock and do a serious carb cleaning.

No it doesn't. Here in Sweden we say bluddra. I just guessing what the English word for it whas. The engine just don't run clean an has lack of effect

 

Hello everyone, hade some deeptalk whit the bike. Started whit the petcock and cleaning it up inside. The diaphragm whas good but it whas a little nasty inside here and there. Now it works as it should! Then i jumped on to the carbs. It was clean inside but I did a whole assembling. When I was on the last throttle valve i saw that the diaphragm had slide out a little from its track in the valve. Checkt all of the diaphragms and glued them. Packed everything together and thrownd it on the bike. Put some gasoline in the tank and now it runs sweet and perfect again the horses that had run away is now back in the garage and i can do some wheeling again I'm 99 % sure the diaphragm that had slide out from its track a little whas the trubbel, taking some thief air. Thanks for the help everyone!

God bless you

 

It's great you have it running, but for how long? The reason many of us like these low milage bikes when we get them is once all the scheduled maintenance that hasn't been done in 30 years is taken care of they're practically new bikes without a note. My bike had 17.8k on it when i bought it in 2011. It has 39k on it now and I didn't ride it for 6 months so I could do all the scheduled maintenance. Also, you should not have glued the diaphragms. Bottom line...If you're happy, I'm happy. Varoom, varoom!

Gary H.

 

Hopefully it will runn for a long time the bike whas a wreck when I bought it. I have rebuilt nearly the whole bike and switched all the bad parts. The only thing I haven't hade apart is the engine. Just checkt te valve clearings and it was good. So i can say that my bike I nearly as new just this little dilemma with the diaphragm and gasoline crane but it's fixed. And why shouldn't i glued it on to the valve?

 

I mis-understood. Some members have had carbs with the slide diaphragms glued in the tracks of the carb body. You glued the diaphragm to the slide yes? If so, I apologize. Sounds like you've got it together.

Gary H.

 

Haha no it wouldn't be so smart to glue it on the carbs. it's glued to the slide