Sorry. Stock carb inlet tube and airbox. I assume it ran fine with those?
We had a whole discussion on Spree pod filters this week in Adv Tech, read up there for my thoughts on this. Not sure if you're having the same problem as others I've seen, where they just can't upjet enough to get a pod to work.
Or how about trying a velocity stack?
I think this would be a better option than a pod. You can tune it by changing the length.
I have all that installed now. It's been running great all summer and plug has been correct color. The only things I changed are 1-replaced air filter box with UNI pod. And 2-started upjetting due to premix. Maybe I will throw my 90 jet back in and see what happens. I will try to scan my plug to show what it looks like. Like I said, I only started to upjet since i'm running premix because oil pump died on me. I started motor with hose off pump for about 30 seconds and no oil came out.
I like the stack!! And I did check out the Spree pod filter post, that's why I switched back to the stock air box. but still I can't get to the "cocoa brown" color plug. Not even close.
I just noticed there's supposed to be a seal between air filter box and cover. That will cause it to run lean. I wish this thing wasn't treated so bad by previous owner, it reminds me of putting together a car motor after someone took things apart, you just don't know what's missing and what goes where. I got it with 890 miles on it and it seems like it should have 5000 miles since it's so hacked!! I'll post results after repair.
It would work a lot better than just the pod filter. Most "good" pod filters have an interal stack, but most are too short to be effective.
Bell mouths like this broaden the effective torque band of the tuned length. At least that's the idea.
To the original poster: Put the stock airbox and tube back on and post back with results. Not sure how much you need to upjet for the oil. I'm sure that information is posted on the web somewhere. I'd be interested if you find it.
I did put the stock air box on and plug was still white like new. That's when I researched a little and found out my air claner lid is missing the seal. I will make a seal after work and see what happens. With the seal missing I'm probably running the same amount of air in as the UNI since air is getting past filter all the way around air cleaner box. It's starting to make a little more sence.
evilone wrote:I did put the stock air box on and plug was still white like new. That's when I researched a little and found out my air claner lid is missing the seal. I will make a seal after work and see what happens. With the seal missing I'm probably running the same amount of air in as the UNI since air is getting past filter all the way around air cleaner box. It's starting to make a little more sence.
It's not the volume of air that is the problem, the carb automaticly adjusts for that because of it's design (all carbs do. It is the length of the intake system, just like too long or short of an exhaust will not work.
Bear 45/70
'83 Aero 80 X 3
'84 Aero 80 X 3 '85 Aero 80 '84 Aero 125 X 2
'84 Aero 125 '84 Aero 125 X 2 '85 Aero 50
'85 Spree
I'm going to get a new oil pump, I hate this premix crap! Not quite used to 2 strokes yet and I know before oil pump went out I was hitting 45-48 mph with quick acceleration. Now I have slow takeoff and only hit 40 mph. I'm close to stock and don't need to premix. Who has an extra oil pump? (87 se50)
