throttle response

[shoopie]

heres another jetting question for you guys. when i hit the throttle quick from idle it kinda bogs before it picks up. when i ease into it, it is really crisp and clean. im wondering which way i should go with my jetting to help this. right now i have 280 mains and stock 25 pilots, all my other mods are in my sig. any help is appreciated guys. thanks

 

-Ryan

[shoopie]

heres another jetting question for you guys. when i hit the throttle quick from idle it kinda bogs before it picks up. when i ease into it, it is really crisp and clean. im wondering which way i should go with my jetting to help this. right now i have 280 mains and stock 25 pilots, all my other mods are in my sig. any help is appreciated guys. thanks

 

-Ryan

 

seems like it would be a little rich but i had nearly no smoke when i started it up and it was running great except for the response issue. i also forgot to mention that i just repacked my silencers although im not sure how that would cause it but it cant hurt to mention it. didnt have it up to WOT 6th gear but i will wring it out tomorrow, do a plug chop and report back tomorrow.

Edited November 18, 2010 by shoopie

[muggzy]

I've got 280 mains in mine and have 27.5 pilots with the needle clip on position 4 (richer mid). When the weather gets really cold I just switch the mains to 300 and I'm good for the winter. Oh, my elevation is ~900ft.

[shoopie]

im thinking maybe move the needle position down a couple spots to help the response issue. i put a new set of plugs in today and ran it all out. plugs look perfect actually. nice light brown burn.

[sleeper06]

Personal experiance with those pipes 30 pilot 2 turns out your main is good needle all the way rich and sync the carbs along with proper cable play

[shoopie]

Personal experiance with those pipes 30 pilot 2 turns out your main is good needle all the way rich and sync the carbs along with proper cable play

 

alright im going to pull apart the carbs tomorrow and tune em. gotta get some different jets

Edited November 19, 2010 by shoopie

[rdzbangshee]

Ive had the best power with a 180 jet its very hard to find the sweet spot one the needles

[banshee67]

Ive had the best power with a 180 jet its very hard to find the sweet spot one the needles

 

holy crap. what would cause you to use such a small jet??? i mean i think 200 or 210 is stock size. ????

[sleeper06]

prob a typo

[rdzbangshee]

sorry guys my jet are drilled they are about 1mm hole

[shoopie]

Needles were on the third clip down. I put then down to the first clip to try to lean them out but it almost made it richer. Its only in like first and second gear when it bogs. Once I get the revs up it runs great and pulls hard. Should I change my pilot jet size? Sorry guys I'm not very experienced with jetting two strokes.

[06specialedition]

Needles were on the third clip down. I put then down to the first clip to try to lean them out but it almost made it richer. Its only in like first and second gear when it bogs. Once I get the revs up it runs great and pulls hard. Should I change my pilot jet size? Sorry guys I'm not very experienced with jetting two strokes.

 

What way did you go with your needle clip? Towards the pointy end is richer and towards the blunt end is leaner just fyi.

[sleeper06]

Bump the pilots richen up the needles,whats making you think you need 2 lean it out

[shoopie]

Bump the pilots richen up the needles,whats making you think you need 2 lean it out

 

Because if its bogging like that its most likely too rich

[muggzy]

The needle has a predominant impact on the mid-range of the throttle. BUT, it also will affect the bottom and top, there is A LOT of overlap. As an example, one needle clip position down will have the effect of richening the pilot and main one size richer as well. So if you have a perfect plug chop with 280 mains and the clip in the middle (position 3 counted down from the top), and then you drop the clip to position 4, you will likely have to change the mains to 270's to keep the high end perfect. Likewise for the pilot. BUT, you can turn the bleed screws out to lean the low end or drop a size on the pilots and vise-versa. The reason that the needle is often ignored, is b/c of that over lap. If your needle is a notch too lean, it can be compensated by making the pilots and mains each richer.

 

Try going 1 notch with your needle, not two. Remember to count down from the top when you mention the clip position and higher numbers will be richer. If the direction you choose worsens your transition, then go one notch the other way and get back to us with the results.