Pods, Pipes, Panic! (Help! Your Bike has Pods)

[nejeff]

Off the subject, saw this pop up in the "new posts". What happened to the OP "MisterCinders"? I remember quite well when he was a regular on the site, now it says he is a guest

Just to add to this thread I'll post my settings

1977 gs750
ape podfilters
4-1 free flowing open baffle exhaust
main jet 117.5
pilot jet 15 (standard)
needle 1 notch up from full rich
fuel screws 1 full turn out from lightly seated
air screws 2.25 out
sea level

A few pops on decel but I'm runing a a 54mm open can so to be expected. I'm happy with the setting a nice Bunsen blue from the colour tune and cold starts and rides lovley.

mabye a starting point for some one with similar mods

You've got something else going on ? No way you should have mains that big and still popping on decel. Are you sure your intake manifolds aren't leaking ?

Maybe this is more to the point: has anyone had actual, reproducible success getting a good idle with k&n pods and cv carbs?

An O2 sensor indicates my air/fuel mix is optimal at idle and throughout the first half of the throttle, but revs still fluctuate at idle and the bike stumbles if I whack the throttle open.

I have 3 bikes that, with the help of this site, I have done ALL of the work on and they all have cv carbs. They all have different levels of mods. They are:

82 1100g 8-valve motor
stock airbox and filter
open stock 4 into 2 exhaust
dj stage-1
50-55 mpg

82 450tx 4-valve 2-cylinder motor
$40 for 2 uni foam pods
open stock 2 into 2 exhaust
dj stage-3
38-42 mpg

83 550e 16-valve motor
2 dodge neon k&n cold intake kit filters, (Siamese carbs)
stock "punched out" exhaust
dj stage-3
50-55 mpg

All of these bikes require "choke" for the first start and a little warm up time
All will fire with a simple blip of the starter button hot or cold and idle smooth and consistent all the time
All will simply "rest" at the 1000rpm idle speed even when the throttle is slammed shut from wide open no matter the duration
All pull consistently from idle to redline
All respond instantly to "fast stabs" of the throttle
Plugs are dark grey in the center and dark brown on the ring

I don't know how it all is if they were attached to all that fancy afr meters and dynos and all, but my bikes always run and run well. They are also plenty powerfull enough for me.

Yes it is possible to tune cv's and do it properly. They run better than most bikes I see, old or new.
Call dj and get their suggested kit for your mods, install per directions, then tune to your liking following the directions.

Just my experience with this whole thing.....

Okay, Bike is running beautifully except that pesky popping on heavy decel. All of my pilot's are still 3-3.5 turns out which is too much. I went on a couple hundred mile ride on Saturday and was still able to get over 40 per gallon on the highway as long as I wasn't riding like an ass racing my friend. So, I am going to the 55s on the pilot. With this said, if these guys work, would it be possible the PO put more aggressive cams in? He did do the dyno kit, K&N pods, accel coils and 4-1. If so would they be labeled different so I could check them out next time I adjust my valves?

I am running 47.5 pilots on my 1100E with APE pods and a Kerker 4-1 and have a little bit of popping on decel, but I live at 3600ft elevation so it won't correlate perfectly to your situation. Two sizes bigger at sea level doesn't seem crazy to me. Are you sure you don't have an exhaust leak? That will also cause popping and banging on decel.


Mark

I did have the tiniest leak on the #4 so I put new gaskets in and no more leaks, but still popping. Really my idle screws are still over three turns out so I may need to go up to the 55s I bought. With the 52.5s I have very little power loss with my girlfriend on the back where as before I noticed a large power decrease. So, I guess that means I am heading in the right direction. It's just surprising that it wants that much juice. Especially considering the PO had 45's in her!

My 1100 pops a certain amount on decel; I think that's normal. (I'm in Queens, so we can take a ride.)

Ya man!

I don't know if you're into choppers at all, but my buddies have this show that will blow you away with how beautiful some of the machines are. They get builders from all of the world. The bikes outside alone could be a show in itself.

http://brooklyninvitational.com/

[mmattockx]

So, my bike is running great, but can't get rid of the popping on decell. I just put in 52.5 pilots and still not any better! how big can I go? the more fuel I feed her the happier she is. Just wondering, what's the biggest anyone has gone on an 1100? I bumped my needles up (moved down one position) to the second up from the bottom. 138 mains (looks like a dyno kit, but I'm not sure it's from a P.O.) Looks to be drilled out. K&N with a home made muffler and winning performance headers. The muffler is short with a 1.75" ID baffle. Bike runs great. The idle is perfect. Plugs look good. Runs strong. Should I just live with the popping on decell? I wish there was a stock 1100 I could ride to compare the performance. As mine was already altered, so I have no frame of reference.

I am running 47.5 pilots on my 1100E with APE pods and a Kerker 4-1 and have a little bit of popping on decel, but I live at 3600ft elevation so it won't correlate perfectly to your situation. Two sizes bigger at sea level doesn't seem crazy to me. Are you sure you don't have an exhaust leak? That will also cause popping and banging on decel.


Mark

[Rob S.]

My 1100 pops a certain amount on decel; I think that's normal. (I'm in Queens, so we can take a ride.)

So, my bike is running great, but can't get rid of the popping on decell. I just put in 52.5 pilots and still not any better! how big can I go? the more fuel I feed her the happier she is. Just wondering, what's the biggest anyone has gone on an 1100? I bumped my needles up (moved down one position) to the second up from the bottom. 138 mains (looks like a dyno kit, but I'm not sure it's from a P.O.) Looks to be drilled out. K&N with a home made muffler and winning performance headers. The muffler is short with a 1.75" ID baffle. Bike runs great. The idle is perfect. Plugs look good. Runs strong. Should I just live with the popping on decell? I wish there was a stock 1100 I could ride to compare the performance. As mine was already altered, so I have no frame of reference.

Since the last time I posted on this thread, I've gone through at least five combinations of mains and pilots. I ended up borrowing a tiny drill index and enlarging my idle jets one bit at a time until the bike would idle and accelerate correctly. I had to go down a few sizes on the main which were included in my dynojet kit, but I found one which performs well.

The bike rides fine now, and I learned a lot, but it would have been much easier to stick with the airbox.

While I am here and have this copied, another user posted this chart a while back.
I think this is a good place for it.

Keihin, Dynojet, Mikuni Jet Size Cross Reference

All Hole Diameters Are in Inches

Hole Dia”---Keihin # -- DynoJet # -- Mikuni #
0.0350---- 92.5--------- 92----------- 86.3
0.0360---- 95----------- 94----------- 88.1
0.0370---- 97.5--------- 96----------- 90
0.0380---- 100---------- 98----------- 91.9
0.0390---- 102.5------- 100---------- 93.8
0.0400---- 105--------- 102---------- 95.6
0.0410---- 107.5------- 104---------- 97.5
0.0420---- 110--------- 106---------- 99.4
0.0430---- 112.5------- 108--------- 101.3
0.0440---- 115--------- 110--------- 103.1
0.0450---- 117.5------- 112--------- 105
0.0460---- 120--------- 114--------- 106.9
0.0470---- 122.5------- 116--------- 108.8
0.0480---- 125--------- 118--------- 110.6
0.0490---- 127.5------- 120--------- 112.5
0.0500---- 130--------- 122--------- 114.4
0.0510---- 132.5------- 124--------- 116.3
0.0520---- 135--------- 126--------- 118.1
0.0530---- 137.5------- 128--------- 120
0.0540---- 140--------- 130--------- 121.9
0.0550---- 142.5------- 132--------- 123.8
0.0560---- 145--------- 134--------- 125.6
0.0570---- 147.5------- 136--------- 127.5
0.0580---- 150--------- 138--------- 129.4
0.0590---- 152.5------- 140--------- 131.3
0.0600---- 155--------- 142--------- 133.1
0.0610---- 157.5------- 144--------- 135
0.0620---- 160--------- 146--------- 136.9
0.0630---- 162.5------- 148--------- 138.8
0.0640---- 165--------- 150--------- 140.6
0.0650---- 167.5------- 152--------- 142.5
0.0660---- 170--------- 154--------- 144.4
0.0670---- 172.5------- 156--------- 146.3
0.0680---- 175--------- 158--------- 148.1
0.0690---- 177.5------- 160--------- 150
0.0700---- 180--------- 162--------- 151.9
0.0710---- 182.5------- 164--------- 153.8
0.0720---- 185--------- 166--------- 155.6
0.0730---- 187.5------- 168--------- 1575
0.0740---- 190--------- 170--------- 159.4
0.0750---- 192.5------- 172--------- 161.3
0.0760---- 195--------- 174--------- 163.1
0.0770---- 197.5------- 176--------- 165
0.0780---- 200--------- 178--------- 166.9
0.0790---- 202.5------- 180--------- 168.8
0.0800---- 205--------- 182--------- 170.6
0.0810---- 207.5------- 184--------- 172.5
0.0820---- 210--------- 186--------- 174.4
0.0830---- 212.5------- 188--------- 176.3
0.0840---- 215--------- 190--------- 178.1
0.0850---- 217.5------- 192--------- 180

[duaneage]

I would start with plug readings at speed and see what you get. Before you spend money on a kit determine a few things first.

Are the carbs synced? Valves adjusted? Air filters properly oiled? Any intake leaks on the boots?

I would start with new plugs since old ones can be hard to read. If you foul them up they can be cleaned (I use Hoppes 9) but new ones are best and they are not too expensive. Later you can use them when it's time to replace.

So should I start with a dynajet stage 3 kit and go from there?

[Rob S.]

At what rpm did these bikes idle, and how was throttle response?

My 1100EZ idles beautifully at 1300 rpm, response is great, pulls to redline with nary a cough or sputter. V&H exhaust, APE (K&N style) pods, DJ stage three kit. Next time I see my tuner, I'll ask what specifically he needed in addition to the DJ stage three kit; I know there were some other parts.

Having access to a dynamometer is a big help.

JTGS850GL - Based on the two charts you posted, the output resembled the wide-band sensor.

Before I elaborate, let me get my hands on the actual numbers. Thanks for the thoughtful response.