KZ440 idling high

[Jpope85]

Working on an 83 440LTD, its got UNI pod filters, stock jets. After its warmed up, idling just wants to shoot up to 4rpms and stay there. Air/Fuel mix screws all the way down doesn't seem to affect it. Idle adjust screw is maybe a half turn in. I'm new with this stuff, any pointers? Thanks.

[Tattooo]

It sounds like a real bad intake leak........Also have you taken the carbs apart and cleaned them???

[Jpope85]

Yea I took carbs apart and cleaned real well. As far as an intake leak, i've sprayed carb cleaner around the boots and the rpms don't jump up or anything. Is there a better way to check?

[Tattooo]

Yea I took carbs apart and cleaned real well. As far as an intake leak, i've sprayed carb cleaner around the boots and the rpms don't jump up or anything. Is there a better way to check?

When it is running at 4000 rpm I doubt it will go any higher.... Take the carbs back off and check for cracks or hard rubbers oh yea be sure and check your clamps...

[Tattooo]

Another question....... What was it doing before you took the carbs off???? You know why did you take them off in the first place...

[Jpope85]

It was stock before, this is the first time firing it up since switching it to pods.

[Tattooo]

It was stock before, this is the first time firing it up since switching it to pods.

That isn't what I was asking...... Was it running ok before you did any changes???? Why did you rebuild the carbs??? More info needed..........

[Jpope85]

Yes it was running well before i did anything. I cleaned out the carbs cause its an old bike, and they were pretty gunked up so good thing.

[Tattooo]

Yes it was running well before i did anything. I cleaned out the carbs cause its an old bike, and they were pretty gunked up so good thing.

Ok if it was running fine before you did anything, you put something together wrong..Or... Did you have the pods on there before or did you have the stock air box??????
If you had the stock air box before your bike is running lean..............

[vwrabbit]

Sounds like the Unis are letting in a good bit of air. What some have done is cut up a soda can to fit inside the Uni to act as sort of a velocity stack. You'll have to cut the top and end off, slit it down the side and then trim the top down so about 3/4 of the filter is covered along the sides. It'll still pull air from the end of the filter.

[Jpope85]

Yea it was running fine before. Its put together correctly, and it was the stock air box before.

[Jpope85]

Sounds like the Unis are letting in a good bit of air. What some have done is cut up a soda can to fit inside the Uni to act as sort of a velocity stack. You'll have to cut the top and end off, slit it down the side and then trim the top down so about 3/4 of the filter is covered along the sides. It'll still pull air from the end of the filter.

I'll give this a try.

[Tattooo]

Yea it was running fine before. Its put together correctly, and it was the stock air box before.

Thank you, It's the pods that's your problem, it's getting to much air and not enough fuel....... Try the can trick it should help......

[Steelhorse]

Just put the air box back on or buy a set of mikuni 32 smoothbores then it will run fine with pods. You're just defeating the purpose of pods if you choke them down with cans or tape

[bcredneck]

Just put the air box back on or buy a set of mikuni 32 smoothbores then it will run fine with pods. You're just defeating the purpose of pods if you choke them down with cans or tape

i half agree its a total waste to choke it down but why the fuck has no one said bigger PILOT JET or hell ream that bitch out a bit You must rejet your carb after every major change to intake or exhausts and that can trick is the dumbest way to avoid that ive ever heard of unless you like a guttless topend
i truly despise mikuni carbs the first thing i do to every yamaha 2 stroke i buy is ditch em