i have the dynojet kit with the #175 main jet installed...
the needle is in the 4th clip..
i am thinkin im a lil too lean on the WOT and was wondering should i go to the 5th clip or just get a bigger jet???
the next size up that I have is a #190dj or the factory #182.5 mikuni...
was just wonderin what yous would do??

warthog

Warthog,

In his tech article, Gram suggests that "to get best results set needle clip on the 5th clip before trying" the test.

Changing the needle position is easier than changing the main so I would first set the needle to 4.5 (if you think it's a "lil too lean&quot and then go to 5.

If it's still too lean at the 5th clip then go up one jet size to a DJ 180. I believe it's not recommended to mix parts from different jet kits so I would not use the Mikuni jet (182.5) with the DJ needle.

Doc

thanks doc
i kinds figured you would say that and i was hopin so..
the only thing i was unsure about was goin to the 5th maybe being too much...
just as goin to the 3rd gets the neelde out too slowly....
i fugured that goin to the 5th may cause bleed over....
anyway ill doo it the easy way...

Just going by what Gram wrote in his Tech Article.

I am seeing that you like doing things the hard way (baffles) but in this case you might as well follow his instructions as it's a pretty simple change.

Doc

ah, the hard way...
it is indeed more simple to just go out and pay the cashish and get what someone else has made... may be prettier and finer eneineered too...
but i get the satisfaction of creation and just what i want when im done...
and lots of profanity practice as well...LOL
besides i have done very well with some things....
the "WARTHOG MANIFOLD MOD" has given most excellent results so far...
with about 1500 miles since the mod i can say that there is VERY LITTTLE difference in plug color as opposed to a sever blackening on the rear and clean(new looking) plugs in the front... less popping too....
besides you at the clinic and those at the forum are the driving motivators in my "HARD WAY" approach... withouth the input and encouragement i might stick to stock and have mamma yama do it all for me..
wouldnt that be a terrible shame???
be cool doc and ill bug you more another time
warthog

OK,

Are you saying that by the porting only the front you have been able to better 'balance' the burn characteristics of the front and rear cylinders? That's very interesting and deserves to be investigated more.

Did you notice any increase in vibration?

You need to post this on the R* Forums and get some feedback. If the "WARTHOG MANIFOLD MOD" is sucessful then you'll have guys beating a path to your door. You could become rich and famous

Doc

i, like so many others with an '04 roadie have had issues concerning the rear clyinder...
i never noticed it much untill i installed the pipes(HK3" big straights)...
i then couldnt wait untill i changed the air box and jetted her...
i was unlearned and bought the speedstar jet kit before i bought my maxair a/c and ordered the maxair W/O their jet kit...(they tried to talk me out of it)
why use a different jet kit when i already had the speedstar item...
poor logic turns out.... so after many unhappy hours of fumbling i took her to the dealer and the wrench tells me to buy a dynojet kit and i would have satisfaction... so i broke down and did...)but still no joy...
it seemed that noone could tell me just what or how to identify the lean condition... so i started looking on the internet and found the clinic, then the R* forun... and started to learn... then to get bold and experiment...
i checked my plugs often and found the the same was always apparent...
Back plugs were black and sooty... Front plugs were clean and new looking...
this was true if i changed to new plugs... or swapped the plugs from front to rear... no matter what jet combo... or needle combo... whether she ran better or worse the plugs were still the same....
then i read about mainfold porting...HMMMM...i wanted to, and, could but why...
did i need the xtra hp???? torque??? not really...what i needed was for those damn plugs to be the same color ( it was killin me) so if porting richens the mix... then i would do ONLY THE FRONT....which was lean (or the rear was rich) which equated to the same thing... i worried that i would mess it up but said WTF (WTF gives you freedom)... and so i did...THE RESULT?????
i have no more vibration than i did(or at least i dont notice any)...
my plugs arent exactly the same but so very close that you have to remember which hole they came from or you might put it in the wrong one...(even after 1500 miles)
i HAVE NOT dynoed her yet or EGAd her either... i am not finished with my baffling, thus the mix will change... but when i get through tinkering ill be puttin her on the dyno and seeing about my manifold mod to be sure...
and sharing what ive found with all my brothers(and sisters) on here...
as is the way...
be it known that i am not on a quest for the... MOST POWER....
but to have a smooth yet powerful and reliable long lasting machine to enjoy for many years to come... BALANCE is the key... this is why i would even experiment with baffles that are as small as 1 1/4" ...i want her to be sweet not just a badass... i think that most who are tinkering would do well to look at the bigger picture with their mills and not get all one-tracked about jetting or pistons or cams or just more power in general...there is the combination to consider not just the one modification... thats the first thing i learned about building....
sorry the beam is making me write too much... ill go now
be safe all and be kool
warthog

Thanks for the detailed explantion.

Once you're finished and run some tests I'm sure you'll have a lot of interst in the results. There's been a lot of discussion on the R* Form re the rear cylinder carbon problem, even at this moment, so if your fix should interest a lot of the owners of newer bikes.

I'm sure Gram would also be interested in your EGA results. He seems to get turned on by that sort of stuff.

Make a separted post when you're done.

Thanks,

Doc

It seems that by porting your manifold front runner and not the rear one, your getting more cylinder fill at the front & not the rear. Remember that to richen or lean out, you must change your air box or your jets/needle position to obtain the right air/fuel mix. The manifold just carries that mix to your cyl.heads, either swiftly or slowly, with turbulence or without. By porting, you're trying to increase the volume and speed by which your cylinders fill. A manifold ported correctly allows the air/fuel mix to travel smoothly into the heads. Just make sure that you are not leaning out your rear cylinder too much as you know what the consequences for detonation are, too much heat and burned pistons & valves. Good luck with your quest...

while i totaly agree that the mixtire is goverened by the jetting of the carb and the allowance of air into the carb by the a/c...
i must remind you that the porting of any manifold richens the mix to both cyinders...
i have already jetted and installed an aftermarket a/c so i have richened the mix in that regard....
the problem is that the cylinders arent burning the mix equally...
this is attributed to a combination of many factors...
one is unequal cooling due to orientation (air hits the front cyl. and is heated before hitting the rear therefore the front is cooler and the rear is hotter)..
this makes the incoming charge denser and therefore requires more fuel...
the problem is that there is only 1 carburetor...
so my plan is to open the flow to the front and give it a lil more to compansate for the leanin out of the front in the idle to 2000 rpm range...
so far the mod IS working..after 1500 miles on open highway and commuting i have had the most equal coloring of the plugs to date...
this predates the installation of the pipes, a/c, or the jet kit
it has also not produced any ill effects to complain about such as vibration or popping or smoking or loss of power... in fact she is as smooth as has ever been and starts eaiser to boot