Needle Jet O-Ring Problem?

[Westy62]

So....I've been having a problem with my CV carbs running rich in the jet needle, needle jet, and main jet areas. I just had the carbs off again and found these o-rings around the needle jet to be pretty rough (trashed actually). I assume this could be my problem since I've been through everything else? The needle jet seemed sturdy, and was in place without damage when I went through the carbs, and I assumed it was all OK.....Are these bikes that sensitive?

I guess I'm learning the hard way!

[Dave8338]

You have o-rings on your needle jets...

[Billy Ricks]

The o-rings should have their greatest effect at low rpm's. You may need to check your float heights. With your bike being rich at all rpm's it has to be something that effects all the ranges. Fuel level in the bowls or timing would be the most logical places to start. Your timing is probably not adjustable without modding the plate the signal generators are mounted to. I'd look at fuel level first.

[Westy62]

Yeah, when you pull the needle jets out of the carb body they're there. The needle jets actually feel a bit loose. The main jets are 115's so I went to the local bike salvage yard and pulled 2 more to make sure mine haven't been tampered with. A few folks mentioned adjusting pilot jet screws, but my manual just mentions the side air screws (about 2 turns out). The carb has a pilot screw in the bottom (in the top of the bowl), and in the intake side of the throttle body. I assume these pilot jets are screwed in to seat and not adjustable?

[robertbarr]

I just had the carbs off again and found these o-rings around the needle jet

That location shouldn't have an O-ring. Maybe that's the problem... and what are side air screws? On CV carbs?? Something's not adding up here.

[Billy Ricks]

Yeah, when you pull the needle jets out of the carb body they're there. The needle jets actually feel a bit loose. The main jets are 115's so I went to the local bike salvage yard and pulled 2 more to make sure mine haven't been tampered with. A few folks mentioned adjusting pilot jet screws, but my manual just mentions the side air screws (about 2 turns out). The carb has a pilot screw in the bottom (in the top of the bowl), and in the intake side of the throttle body. I assume these pilot jets are screwed in to seat and not adjustable?

You have to buy different value jets to replace those.

[Dave8338]

That location shouldn't have an O-ring. Maybe that's the problem... and what are side air screws? On CV carbs?? Something's not adding up here.

Glad I'm not the only one who caught that...the reason that there all squished out is that you wouldn't be able to seat the jet tight until the oring broke. :?

[renobruce]

You are describing VM carbs, not CV carbs. What year/model bike?

[Steve]

Let's get our ducks in a row before we start shooting...

WHAT BIKE ARE WE TALKING ABOUT???? :shock:


.

[Westy62]

Amazing!!

Just when you think a bike is bone stock (I have the title from the original owner).....You find something like this after a month of headaches.....On the left is the 115 main I picked up at the salvage yard, and on the right is the one that's in the bike (2 of them).....Someone hogged these things out to about 200!! No wonder my CV carb issue/airbox problem has plagued me!!

Running a bit rich??

I'm going to put the right jets in and be done!!!

For sale also.....(I had a chance to buy my boss's bike).

Thanks everyone for putting up with my problems, I am soooooo relieved to find this!!

Wes

[Billy Ricks]

Does sound like he's talking VM. I haven't had the stock CV's in years and couldn't remember if they had o-rings or not on the pilot screws. The RS carbs do. If we're talking about a bike old enough to have VM carbs then he may have a timing problem. He's confusing the needle jet for the pilot screw I think.

[Westy62]

1980 Gs450e.....

[Billy Ricks]

Now that's special.