Was running fine but now it's not????

Hey gang,

I recently did my chain and sprockets and the head cover gasket on my '92 and now that it's all back together, she won't run right. On choke, the bike should run rich right? And be up at like 4000 RPM? Well, she'll only start up on choke and goes straight to 1000 RPM and doesn't change. I had overfilled the oil and it bubbled into the airbox and soaked my filter but I sprayed it out and let it dry. Should I just adjust the idle screw?

 

No, you should REPLACE the air filter. Doubful you got it clean enough to pass the appropriate amount of fresh air.

 

A lot of people told me I can use household cleaners (a replacement is 47 bucks so I am NOT buying a new one - I'd sell it before I spent 50 on a new air filter that's ridiculous). Also I am supposed to 're-oil' it apparently??? It's supposed to have that oil on it?! Whoops! (It is a uni highflow mesh cone filter) Does it have the same intake as when it doesn't have a filter in? Cause it starts right up, no choke with the air filter out.

 

Your post confirms that you already know the oil screwed the air filter up.

I'm not sure if Uni filters are a "wash and oil" type or not; if so it would require special filter oil, not an excess of motor oil.

It should start and run OK without the air filter but the bike will run lean so you do need to get a filter back in there.

Personally, I would recommend going back to the original style paper filter.
You simply replace them when they get dirty; yes it might cost a few $$ more in the long run but for me it's worth the convenience and peace of mind.

 

I just replaced my oil soaked UNI filter. It was $27 from the dealer. OEM paper was around $44, and they even had aftermarked one for like $17. I went with the UNI as it was middle of the road in $$$ (and washable I think)

 

I moaned and groaned but replaced the filter with an OEM ($48) and couldn't be happier. Well worth the money. When you get right down to it EVERYTHING is expensive on older bikes, but that just comes with the territory.

 

Not to mention that all that nice clear air we ride in is full of tiny dust particles that eventually raise Holy H with engine innards.
Even at $50 the filter is a gotta'have.

 

I seldom have to change a filter more than once a year in this area so expense isn't important on something so important.

 

I don't think I can get a paper filter. I've checked the dealer, I've googled it and had no turnout on PAPER filters, however the Haynes shows one. What other problems could be causing this? There is another symptom; the choke lever is on the side of the carbs not the handlebars like ya'll's and it used to pull out two clicks. Now, I can pull it out to two clicks but it's springed back down to one click. If I want it to be all the way out I must hold it.

 

Your stock air filter element, Yamaha pn 4BR-14451-00-00 lists for $37 (from Yamaha) and appears from the fiche to be a perforated metal screen canister with an opening on one (or both) ends and a paper element inside.

You should be able to find them on eBay (or an aftermarket equivalent) for considerably less.

 

My local Stealership didn't have one in stock either, but had no problem ordering it and it arrived in 2 working days.

 

The paper one is MORE expensive?? I assumed b/c it was so expensive it was the uni. Fitz where did you get that value, the dealer down here has it for 47.11

 

DAMN! just went outside thinking "y'know, it's a real nice day. maybe she'll start up and be happy!" So I pulled the choke out, hit run and pressed start. Turned over 3 times and started up to 1000 RPM (on choke) so I gave it a tiny bit of gas and it dies... So I start it back up, takes more turnovers but goes to 1000 RPM (still on choke) I give it a little bit of time then some gas and it dies... I take it off choke for gits and shiggles try to start it...of course, nothin.

Does that means it's flooding? Does that confirm that it's not getting enough air, or could it mean it's not getting enough gas? Could it be some sort of vacuum problem? Like maybe one of the boots isn't sealed perfectly??

Desperately need this bike running!

 

Did you try it without the air filter?

 

Whoops! I forgot I didn't hook up the fuel lines. They're on now and got the bike to start and run on choke (the BBQ paint I put on the exhaust yesterday smokes) but when I let go of the throttle, the bike drops RPMs and sputters out. If I don't give it constant throttle it dies. Is everyone going with the air filter? Are there no other possibilities?

 

If I take out the air filter and it runs fine, does that confirm that the air filter is at fault? Wouldn't there be more airflow w/o filter than with a brand new clean filter? Could this problem be fixed by fiddling with the big screw on the carbs? What happens when you run it with an oil type filter with no oil on it?

 

Bet Len (chacal) could get you a filter at a better price. Why don't you PM him and see what he says.

MN

 

He doesn't have parts for my bike (92)....

 

Bike Bandito wants $47.11 too; oh well--- these guys show it for less, the price I quoted: http://www.babbittsonline.com/pages/par ... fault.aspx
They're my favorite source for stuff chacal doesn't carry (which isn't much...)

 

I just took it for a spin up and down the street. After it got hot (I had it on choke the entire time) the RPMs were up at 3000, so, while in second, I pushed the choke in and.... it died. So I popped the clutch, kept it revved and pulled the choke back out. It sounded like it wanted out of choke but when taken out, it dies. Maybe the carb boots are letting air in?? I'm starting to think it's the air filter less and less - cause wouldn't it just bog out ALL the time? Jumps right on up when givin it the gas though...

 

You know your Uni filter got soaked with oil and you used less than reliable methods to clean it.

You know the bike will run a whole helluva lot better with the filter out.

Go ahead and try to talk yourself out of replacing the air filter if you want-- you can probably find at least 6 other things to fix first, but if it NEEDS an air filter it needs an air filter.

Didn't we go through this dance when your sprockets wore completely out?

Wanna know the best thing about beating your head against the wall?

It feels really good when you STOP.

 

Hehe... XD

Fitz, you're the best!

I'll try fixing it by means that don't cost money (sealing the boots up somehow (they're cracked pretty bad)) before dumping 50 bucks on a piece of paper. Know what I mean?

Especially when I have 2$ to my name!!