DNA180 corner

[stroker]

Originally posted by danielburgess@Feb 23 2006, 03:13 PM

Hmmm, I think I get what stroker is getting at, the Pilot jet acts as a step down jet, for lower rpm range? And the Main jet is for a higher RPM range, so the pilot jet should be smaller? I mean like the pilot jet and the main jet cannot be 115 for example?

Sorry but I have never ever gone near the pilot jet in my life!

 

Cheers...

Nope, you haven't gotten me, yet. The pilot circuitry is another circuit independent to the main circuitry.. It does not step down the mixture.. You're right about pilot jet being smaller. Yes, they're (and so is their numbers) smaller, but not comparable to main jet cos they're different jet of diff design and ratings. So the numbers are not relative to each other..

 

Yes, main is in a way for the higher rpm. But not quite right to say that. Cos you can be using yr main jet when at low rpm. Cos a Wide Open Throttle dosen't alwasy equate high rpm. It could be full-bore on the throttle while accelerating up tru the revs. The jets' influence on fuel metering go by throttle openings, not revs. Revs are a result of throttle openings..

 

The pilot circuitry works when your throttle slide is 1/4-opened and smaller.. During this state, fuel does not flow tru the main jet, but majority tru the pilot circuitry. So in order to cure your backfire, you'll have to richen it up..

 

Phew.. lol.

[danielburgess]

Ouch, after that, I think stroker is suffering from "finger fatigue".

 

Cheers...

 

P.S. I still think the carb is the ######-iest thing in an engine!

[stroker]

Originally posted by danielburgess@Feb 23 2006, 03:51 PM

Ouch, after that, I think stroker is suffering from "finger fatigue".

 

Cheers...

 

P.S. I still think the carb is the ######-iest thing in an engine!

Eh bro, btw, where exactly did you buy yr jets from huh?? My fren searched around for it but didn't seem to be able to find it..

[specialc]

Originally posted by danielburgess@Feb 23 2006, 03:51 PM

Ouch, after that, I think stroker is suffering from "finger fatigue".

 

Cheers...

 

P.S. I still think the carb is the ######-iest thing in an engine!

Danny boy, wait till you try playing with car's ECU.... pilot jet is what I call CLOSED LOOP tuning. WOT and more than a preset rpm, thats OPEN LOOP.

If you find carb hard to play, years to come when you touch cars, fark, you will faint!

 

Anyway, have been thinking about the helmet saga yesterday at that "shop". Fark, why the prices are jacked up more than 40% when you are in shirt and tie.

I wonder what happens when you are in a suit...jackedu p more than 100%? Really damn knn.

[specialc]

Originally posted by stroker@Feb 23 2006, 03:38 PM

So in order to cure your backfire, you'll have to richen it up..

 

Phew.. lol.

I am not too sure abt this...but usually, a rich condition will cause backfire cause uncombusted fuel goes through your exhaust and out into atmo?

 

Enlighten me pls? Thought it should be lean out slightly.....

[stroker]

Originally posted by specialc@Feb 23 2006, 04:17 PM

Danny boy, wait till you try playing with car's ECU.... pilot jet is what I call CLOSED LOOP tuning. WOT and more than a preset rpm, thats OPEN LOOP.

If you find carb hard to play, years to come when you touch cars, fark, you will faint!

 

Anyway, have been thinking about the helmet saga yesterday at that "shop". Fark, why the prices are jacked up more than 40% when you are in shirt and tie.

I wonder what happens when you are in a suit...jackedu p more than 100%? Really damn knn.

Because one will look like a carrot when dressed up in shirt and tie I supposed!!

[stroker]

Originally posted by specialc@Feb 23 2006, 04:22 PM

I am not too sure abt this...but usually, a rich condition will cause backfire cause uncombusted fuel goes through your exhaust and out into atmo?

 

Enlighten me pls? Thought it should be lean out slightly.....

Bro, you'll have to trust me on this one.. haha.. I too thought that a rich mixture causes backfiring.. As per all others with tech background/ knowledge.. Its rather strange, but apparently, backfirings on scoots MUST be solved with a richer pilot. If the prob appears suddenly, its an indication of air leaking into fuel hoses/ airboxes etc etc.. Thus resulting in a lean mixture and hence the backfiring.

 

The backfiring on a scoot is the not same as the ones with overly rich mistures produces.. Its more like a fart (loud one).. While the rich-mixture induced backfiring is the flammy one cos of the excess fuel in the exhaust pipe..

 

Dun flame me on this.. But Danny boy can try if he doesn't believe me.. Leaning the pilot will worsen his prob.. I went tru the same thing countless times.. hee hee

[danielburgess]

Be like me, go in singlet and shorts, and slippers, worse is to go as an angmoh, they think they have hit the jackpot, and fake accents come out of thin air like that punk at desmond shop!

 

P.S No way am I going to play cars, play bikes already wallet scared liaoz....

[specialc]

Originally posted by stroker@Feb 23 2006, 04:35 PM

Bro, you'll have to trust me on this one.. haha.. I too thought that a rich mixture causes backfiring.. As per all others with tech background/ knowledge.. Its rather strange, but apparently, backfirings on scoots MUST be solved with a richer pilot. If the prob appears suddenly, its an indication of air leaking into fuel hoses/ airboxes etc etc.. Thus resulting in a lean mixture and hence the backfiring.

 

The backfiring on a scoot is the not same as the ones with overly rich mistures produces.. Its more like a fart (loud one).. While the rich-mixture induced backfiring is the flammy one cos of the excess fuel in the exhaust pipe..

 

Dun flame me on this.. But Danny boy can try if he doesn't believe me.. Leaning the pilot will worsen his prob.. I went tru the same thing countless times.. hee hee

Cool, this is something new I learnt and invaluable for modding scooters like DNA!!!

 

Damn..this is really reverse engineering for me!!!

 

Ok...so where can I go to to beli helmet from people who don't take me as a carrot! Must I wear tattered Levis?

[stroker]

Originally posted by specialc@Feb 23 2006, 04:37 PM

Cool, this is something new I learnt and invaluable for modding scooters like DNA!!!

 

Damn..this is really reverse engineering for me!!!

 

Ok...so where can I go to to beli helmet from people who don't take me as a carrot! Must I wear tattered Levis?

Bro levis still too high class la.. haha.. You gotta wear flip flops from brands like 'Tat Sing' and best, shorts and white singlet.. hahaha.. And rem, one last point, park yr spec c two miles away!! ha!

 

Joking abv la.. But if someone who's in the know brings you there, chances are you wont get chopped.. Or at least go to reputable shops lor..

 

Actually on hindsight, LAB is not all bad.. Which helmet you wanna get? I prolly can get a good rate for you.. Their prices are good, just that like you said, service f-up with no nets lor..

 

cheers~~

[MonaroDna]

Hi guys,

About the main jet size is 118 and because of I`m using aftermarket muffler I`m running 120 main and they put spacer to the pilot jet as well. I kow that because we put it on dyno came up 15 horse power on the rear whell and air to fuel ratio was 13.3 to 13.8 at highest before the jet upsizing now it is 12.8 . And as a result my take of slow down a bit because more power = quicker gera change whic is no good for my riding style. So I changed the weights again from 9 gram to 8 grams original 10 grams. But I think I`ll go with 7 grams next week. Because I`m happy when the engine is cold but when it worms up fully revs up bit less comparing to when it was cold. Anyways thats my story.

Safe riding to all.

[stroker]

Originally posted by MonaroDna@Feb 23 2006, 10:11 PM

Hi guys,

About the main jet size is 118 and because of I`m using aftermarket muffler I`m running 120 main and they put spacer to the pilot jet as well. I kow that because we put it on dyno came up 15 horse power on the rear whell and air to fuel ratio was 13.3 to 13.8 at highest before the jet upsizing now it is 12.8 . And as a result my take of slow down a bit because more power = quicker gera change whic is no good for my riding style. So I changed the weights again from 9 gram to 8 grams original 10 grams. But I think I`ll go with 7 grams next week. Because I`m happy when the engine is cold but when it worms up fully revs up bit less comparing to when it was cold. Anyways thats my story.

Safe riding to all.

:thumb: Been wanting to put mine on a rollin' road... HmmmMm Maybe one day should just do it! Cheers and safe ridin' to ya m8!

[danielburgess]

Hmmm, it may take a little time for me to get used to it all! But the main jet is the one responsible for giving us the power to reach top speed? Anyway, just out of curiousity, I missed the deadline for the LTA inspection on my IU unit, will I get in trouble for that?

[stroker]

Originally posted by danielburgess@Feb 24 2006, 10:25 PM

Hmmm, it may take a little time for me to get used to it all! But the main jet is the one responsible for giving us the power to reach top speed? Anyway, just out of curiousity, I missed the deadline for the LTA inspection on my IU unit, will I get in trouble for that?

Yup, main jet. No idea abt IU.. Haven't missed inspection b4.

[specialc]

Originally posted by stroker@Feb 23 2006, 04:45 PM

Bro levis still too high class la.. haha.. You gotta wear flip flops from brands like 'Tat Sing' and best, shorts and white singlet.. hahaha.. And rem, one last point, park yr spec c two miles away!! ha!

 

Joking abv la.. But if someone who's in the know brings you there, chances are you wont get chopped.. Or at least go to reputable shops lor..

 

Actually on hindsight, LAB is not all bad.. Which helmet you wanna get? I prolly can get a good rate for you.. Their prices are good, just that like you said, service f-up with no nets lor..

 

cheers~~

Ok lor...I wear Giordanos can?? And I drive maybe my van down?

 

I just dun like the LAB mess lor.... anyway what I wanted is just a flip up full face, black in colour...plain...no fancy designs cause me no racer....

[specialc]

Originally posted by stroker@Feb 24 2006, 11:05 PM

Yup, main jet. No idea abt IU.. Haven't missed inspection b4.

Got inspection for IU meh? Unless it is giving you problems when you go thru the gantry. No problem one, just give them a call and say everything is in order...they bo chap one.

[danielburgess]

Thank u specialC, here u go, a little reward for u, in my opinion the cheapest flip-ups around. But only DOT approved...

 

http://chinabargains.sgboards.com/chinabargains-about61.html

[specialc]

Danny boy, cannot go in...... need username and password.

[danielburgess]

With Spiderman gone, this place is so quiet. Hey, been doing research, so the fastest 2A bike is the RS250?

[stroker]

Originally posted by danielburgess@Feb 28 2006, 02:10 PM

With Spiderman gone, this place is so quiet. Hey, been doing research, so the fastest 2A bike is the RS250?

Yeah, really so darn quiet.. Like ghost town.. I had to bump the thread up in order to prevent it from disappearing.. haha..

 

I won't dare to say that.. ha. Many riders will be 'pissed'.. ha. Apparently there's quite alot of PGM4 and RVF riders who refuse to admint that the rs250 is fast.. Dunno why.. On paper, stock rs250 is 55bhp. PGM4 is 45bhp. RVF is 53bhp (again, if my memory hadn't fail me). PGM4 shoulkd be slightly lighter then RS250. Slightly. Whilst the RVF is much heavier..

 

You do your maths and draw yr own conclusions.. My vote goes to rs250 though.. The bike rocks.. You interested?? I'll buy one to do up if I can afford the time and money.. But apparently, I can't affor to do it.. ..

[Niterider78]

Originally posted by stroker@Feb 28 2006, 03:06 PM

Yeah, really so darn quiet.. Like ghost town.. I had to bump the thread up in order to prevent it from disappearing.. haha..

 

I won't dare to say that.. ha. Many riders will be 'pissed'.. ha. Apparently there's quite alot of PGM4 and RVF riders who refuse to admint that the rs250 is fast.. Dunno why.. On paper, stock rs250 is 55bhp. PGM4 is 45bhp. RVF is 53bhp (again, if my memory hadn't fail me). PGM4 shoulkd be slightly lighter then RS250. Slightly. Whilst the RVF is much heavier..

 

You do your maths and draw yr own conclusions.. My vote goes to rs250 though.. The bike rocks.. You interested?? I'll buy one to do up if I can afford the time and money.. But apparently, I can't affor to do it.. ..

Yeah! Rs250 Rock!!

[stroker]

Originally posted by Niterider78@Feb 28 2006, 05:27 PM

Yeah! Rs250 Rock!!

Yeah our bro here rode an RS250 and RVF before.. So he can be able to give you some feedback..

 

Wah, so free knock off huh?? Or eating snake?????

[Niterider78]

Originally posted by stroker@Feb 28 2006, 05:37 PM

Yeah our bro here rode an RS250 and RVF before.. So he can be able to give you some feedback..

 

Wah, so free knock off huh?? Or eating snake?????

You also so free huh.. I eaten snake already.. Now relac one corner.. Ha..

[stroker]

Originally posted by Niterider78@Feb 28 2006, 05:44 PM

You also so free huh.. I eaten snake already.. Now relac one corner.. Ha..

Ok Ok La.. Just ran alot of errands.. Paid insurance, road tax, an overseas bank transfer (knn, bank charges so damned !@#!$@## expensive!! !@!!@$#@%%), now broke.. ha.. Not hungry yet.. Still got a couple of hours before knockin' off..

[Niterider78]

Originally posted by stroker@Feb 28 2006, 05:54 PM

Ok Ok La.. Just ran alot of errands.. Paid insurance, road tax, an overseas bank transfer (knn, bank charges so damned !@#!$@## expensive!! !@!!@$#@%%), now broke.. ha.. Not hungry yet.. Still got a couple of hours before knockin' off..

Ha.. u seems very busy today.. Maybe i do my main jet later.. U got the dia for the tube?