dynojet question, still running lean

[jordraatt]

aaah, really sweet bike there! love the details! i can see how important it is to strech it now.. good looking air filters and handlebars!

[mvalenti]

thanks for the props, I dont want this to turn into a hijack on the thread. PM me I have some other sites that might interest you as well.

[jordraatt]

so, back to the thread. anyone here who have some experiences with cheap pods?? is it normal that the carb tuning gets a pain in the ass after installing cheap pods instead of using f.ex K&N??

(K&N ordered btw)

[koolaid_kid]

I have not used them myself, but I did personally witness jetting issues with a Yoshi replica on a North Carolina rally. It never ran right and he ended up trailering it back home.
I have also read lots of posts about how difficult they are to dial in. One member, however, did respond that he was able to dial his in. I think that if you used a wideband (sniffer) you could probably do it.

[jordraatt]

okey, thanks.. i've ordered some K&N pods instead now.. i guess the Dynajet kit is set up much closer to those filters than my cheap pods, which are letting in A LOT of air..

[kpotter16]

I've been having the same problem with my 83 GS750es. i just installed a Dynojet stage 3 and its been bogging down or something similar to that effect between 1/4 to 1/2 throttle position. i was told by CafeKid that it was the position of the needle jet clip needed to be moved. i did install the cheap pods though...could that really be a part of the issue?

[jordraatt]

I've been having the same problem with my 83 GS750es. i just installed a Dynojet stage 3 and its been bogging down or something similar to that effect between 1/4 to 1/2 throttle position. i was told by CafeKid that it was the position of the needle jet clip needed to be moved. i did install the cheap pods though...could that really be a part of the issue?

well, i've read some threads around here, and it seems that cheap pods might be a part of the issue yes.. we seem to be in the same position here my friend, so let's figure it out..

the cheap pods are letting in a lot more air than for example K&N filters.. i've heard people talking about major differences in air flow, just by running with/without oil in the filter, so i guess this is pretty sensitive..

as i said, i am going to install K&N pods as soon as i get them now.. when i do, i'll get back to this thread and tell you about the results.. meanwhile, maybe you can experiment by moving the needle jet clip?? because this is the midrange sector of the carb tuning.. jets are the high rpm, and float height is the low rpm

[kpotter16]

i haven't done this yet but i am planning to move the needle jet clip down one more position to make it run a little more rich and it should help alleviate some of the problem, but i was actually just talking to someone who said that the problem is that with the pods on a stage three kit the jets are not big enough to compensate for the increase in air flow. if we were to go up one size to larger main jets it could clear the problem up. He said to first try adjusting the needle clip position again first though and if it didn't work to clear it up to try that.

[EvilEnfield]

First move the needle jet down one notch, towards the tip, if that doesn't help then get yourself some of these;

http://www.ebay.com/itm/20-PC-MICRO-METRIC-3-1-6-mm-SIZE-DRILLS-PRECISION-DRILLING-JEWELRY-MODELS-TOOLS-/180893263963?pt=LH_DefaultDomain_0&hash=item2a1e14285b#ht_500wt_1180

http://www.ebay.com/itm/4PC-Hollow-Wire-Pin-Drill-Vice-Airfix-Hornby-Modeling-Craft-/400299391842?pt=UK_ToysGames_ModelKits_ModelKits_JN&hash=item5d33b3fb62#ht_5191wt_1163

Then you can drill out the jets which you know are too small to see if it helps.

[jordraatt]

First move the needle jet down one notch, towards the tip, if that doesn't help then get yourself some of these;

http://www.ebay.com/itm/20-PC-MICRO-METRIC-3-1-6-mm-SIZE-DRILLS-PRECISION-DRILLING-JEWELRY-MODELS-TOOLS-/180893263963?pt=LH_DefaultDomain_0&hash=item2a1e14285b#ht_500wt_1180

http://www.ebay.com/itm/4PC-Hollow-Wire-Pin-Drill-Vice-Airfix-Hornby-Modeling-Craft-/400299391842?pt=UK_ToysGames_ModelKits_ModelKits_JN&hash=item5d33b3fb62#ht_5191wt_1163

Then you can drill out the jets which you know are too small to see if it helps.

to drill the holes bigger or change the main jets will probably work if the problem is in the upper rpm area.. but both of us are struggling with lower/mid rpm area.. that means changing needle position and/or adjusting float height

[jordraatt]

i haven't done this yet but i am planning to move the needle jet clip down one more position to make it run a little more rich and it should help alleviate some of the problem, but i was actually just talking to someone who said that the problem is that with the pods on a stage three kit the jets are not big enough to compensate for the increase in air flow. if we were to go up one size to larger main jets it could clear the problem up. He said to first try adjusting the needle clip position again first though and if it didn't work to clear it up to try that.

i have already tried bigger main jets, but that is for the high rpm area.. we are struggling with the low/mid rpm area.. the problems here might be the needle clip position, the needle size or the float height.. looking forward to try with the new K&N pods though, to see if that helps

[blowerbike]

simple...
ride the bike with no filters.
it will run the same as if it had K&N's on it.

FYI
the problem with the emgo's isn't that there letting to much air in..
its that there shape is small and restrictive and makes the in coming air do strange things.
emgo's on CV carbs are crap and cause problems but they seem to work ok on the small say 26/28mm mechanical VM's.

[jordraatt]

simple...
ride the bike with no filters.
it will run the same as if it had K&N's on it.


FYI
the problem with the emgo's isn't that there letting to much air in..
its that there shape is small and restrictive and makes the in coming air do strange things.
emgo's on CV carbs are crap and cause problems but they seem to work ok on the small say 26/28mm mechanical VM's.

1. mmm, i'm not so sure about that.. i've tried with and without a oiled up pod, very big difference in air flow..

2. the K&N's are designed in another way than cheap pods.. they are designed to eliminate this air-turbulence caused by cheap pods.. well, at least that's what i've read around.. so you are right about the air doing strange things with pods
here's a photo of the K&N filter: http://www.google.no/imgres?q=suzuki...:7,s:143,i:128

[blowerbike]

1. mmm, i'm not so sure about that.. i've tried with and without a oiled up pod, very big difference in air flow..

2. the K&N's are designed in another way than cheap pods.. they are designed to eliminate this air-turbulence caused by cheap pods.. well, at least that's what i've read around.. so you are right about the air doing strange things with pods
here's a photo of the K&N filter: http://www.google.no/imgres?q=suzuki...:7,s:143,i:128

i have never oiled my K&N's...most people oil them to much.
i don't live near a beach or down a gravel lane so i have never had any engine problems from the K&N's not being oiled.
the information i offer is from 20+ years of working on these GS turds.
do with it as you wish.

[EvilEnfield]

to drill the holes bigger or change the main jets will probably work if the problem is in the upper rpm area.. but both of us are struggling with lower/mid rpm area.. that means changing needle position and/or adjusting float height

What about pilot jet?