thianzDrive bigger bike only now? LC put aside mostly? Haha...

Lokasi mana? Do you want to be added to front page?
Can attach a photo also.

This post has been edited by alexei: May 6 2014, 08:08 AM

Guys, i need to know about air/fuel mixture screw setting for stock lc v2 4 speed. anybody knows please tell me. how many counter clockwise turns from the fully closed position? it is hard for me to find the stock setting because of new carburator that lc v2 use is mikuni bs25. it has rubber diaphragm that controls the needle jet. so, if you twist the throttle, it would have some delays before the air/fuel mixture being suck by the piston.

thanks.

u pergi kacau ???

No photo yet... eveything still stock..

yes. i changed from stock paper air filter to high flow air filter. now i set the air/fuel screw to 5 turns out from fully closed position.

Wrong setting can cause high fc

yes. i know that. this is why i'm asking here. hope you guys can help me to find perfect setting for mikuni bs25 carburetor.

Different bike same model setting also different. Go find sifu tune for u.

Or u can try from pusing 1/4, 1/2, 3/4...

on the left side of mikuni bs25 there is a screw located near the intake manifold. is that fuel screw or air/fuel mixture screw ?

kacau air screw .. the idle screw ... u pusing bila timing tinggi , u kasi rendah or too rendah u kasi tinggi ....

Stupid BS carbs...

Tips for you:
Close the pilot screw, and open 2.5 turns.
The bike will run very poorly, or not at all, without the airbox installed. The airbox also needs to be properly sealed, so consider replacing any deteriorated foam seals as needed.
If pod air filters are installed the carbs will have to be rejetted to match the low restriction airflow.
Fine tune the carbs (engine fully warmed up and idling) by adjust the pilot screws in roughly equal amounts until the highest idle speed is achieved. If the engine speed doesn’t respond to this tweak, leave them at 2.5 turns.
If the engine stumbles just off idle, try opening the pilot screws another ½ turn and try again.
The maximum number of open turns is four, otherwise you should get larger pilot jets.
If the engine surges or feels like it’s running outof gas when cruising at steady speed, such as on the freeway, opening the pilot screw more and/orshimming the needles may help.

Stupid BS carbs...

Tips for you:
Close the pilot screw, and open 2.5 turns.
The bike will run very poorly, or not at all, without the airbox installed. The airbox also needs to be properly sealed, so consider replacing any deteriorated foam seals as needed.
If pod air filters are installed the carbs will have to be rejetted to match the low restriction airflow.
Fine tune the carbs (engine fully warmed up and idling) by adjust the pilot screws in roughly equal amounts until the highest idle speed is achieved. If the engine speed doesn’t respond to this tweak, leave them at 2.5 turns.
If the engine stumbles just off idle, try opening the pilot screws another ½ turn and try again.
The maximum number of open turns is four, otherwise you should get larger pilot jets.
If the engine surges or feels like it’s running outof gas when cruising at steady speed, such as on the freeway, opening the pilot screw more and/orshimming the needles may help.

thanks for the tips!
i just know that screw which located near the intake manifold is FUEL screw. this mikuni bs25 is not for performance but i has good fuel consumption.
i just changed the stock paper air filter to a high flow K&N clone air filter. then i set the carburetor fuel mixture screw (this screw located near the intake manifold) to it's fully close position. i started the bike and set the carburetor idle to 2000-3000 RPM and open the fuel mixture by turning it counter clockwise until i hear the bike revving to it's maximum RPM. it is about 3.5 turns counter clockwise from the fully close position. after that, i added 1.5 more turns from the 3.5 turns position. means 5 turns out. im not sure if my setting now is lean or too lean or rich or too rich.

I also replaced with k&n usa, need setting again?

i think yes.
i also changed the stock exhaust to a 28mm manifold exhaust.
this is why i kacau the stock carburetor setting.
if we set the carburetor too lean, the engine will be easy to start on cold temperature, but the combustion chamber can be hotter so not suitable for long distance and it also not good for spark plug.
if we set the carburetor too rich, it will be hard to start on cold temperature because fuel is more than the air but good for long distance and also not good for spark plug.
i'm looking for balance between this 2 conditions.


waiting for bro alexei to answer the question.

This post has been edited by piju: May 9 2014, 12:35 PM

xpaya knn filter la .. go cari those racing air filter around 20-30 dah cukup .... i no air filter pun ok jer .....

you lc version berapa ?
carburetor apa ?

v1 .. carb tzm , carb original .....

juz wan to confirm, d oil filter replace every time oil change or twice a time?

kalau kaya .. boleh tukar every time .... kalau x kaya .... sila pakai ori punya ... change it on 3rd EO service ...

or u can look for those oil filter can reuse .... around rm20-25 .... buka dan cuci every service ....