basic tuning for four strokes - xBhp.com : The Global Indian Biking Community

rajnish · 04-28-2003, 06:41 PM

what i gather is everyone is wary of opening the engine or using high comp.pistons or heads.so the best way of better performence is rejetting the main jet and start by using a 5 num.bigger jet.and go on increasing the jet size by 5 till u get a good setup.if for eg. u go from 115 to 130+ than u need a more unrestricted air filter.also any thing more than 135 u need a bigger pilot jet as well,also turn in air screw a bit to make mixture bit richer and than take it out based on ur feeling of power.gettin'jets is not easy but in delhi u can.this is for better mid and top end.combine this with a front sporcket one teeth smaller for low end.i feel this is most economic and easily done tuning.

MOKSH · 04-28-2003, 07:13 PM

CAN A NORMAL MECHANIC DO THESE KINDS OF MODS. ON THE BIKE ??
CAN I BUY THESE JETS FROM A LOCAL BAJAJ DEALER ??

rajnish · 04-28-2003, 07:47 PM

well the jets will be of a diff.bikes but will work well.on RD's we use rx 135 jets.that's ok.these r basic mods which can be done by u at home.just need to learn how to open carb.imagine me opening 2 carbs and in end spending time syncronizing them together.or a 350 won't perform.jets can be bought from spare shops.u need info on which bike uses what size main jet.mech.i doubt even know how jets work.ask all the members to post main jet sizes of different bikes.

MOKSH · 04-28-2003, 07:58 PM

THANKS DUDE
I WILL ASK THEM

nav75 · 04-28-2003, 08:43 PM

Also fitting a dual silencer or a free flow is not that effective on a 4stroke as its on a 2stroke..what u say guys?

MOKSH · 04-28-2003, 08:49 PM

YES I AGREE ITS NOT AS EFFECTIVE AS ON THE 2 STROKES BUT IT DEFINITELY ENHANCES THE LOOKS OF THE BIKE !!
A P180 WITH A DUAL SILENCER LOOKS MIND BLOWING !!
SO DOES A CBZ

krome · 04-28-2003, 10:38 PM

extra weight no good..

MOKSH · 04-28-2003, 10:42 PM

I KNOW THE EXTRA WEIGHT IS NOT GOOD
ONE OF MY FRIEND GOT AN EXTRA SILENCER ON HIS CBZ AND HAD BIG TIME PROBLEMS
HIS BIKE WOULD WOBBLE ABOVE 60 AND HE HAD TO GET RID OF THE EXTRA WEIGHT IMMEDIATELY !!
IT AINT GREAT !!

shady · 04-28-2003, 10:51 PM

yeah moksh... u know i got the silencer put upon the left side and couldn't ride above 60 kmph.. had to take it out man. hey lets check out this jet and stuff sounds intresting.

MOKSH · 04-28-2003, 11:02 PM

YES SURELY IT DOES
EVEN I HAVE BEEN THINKING ABOUT THIS JETS AND STUFF AFTER I READ IT !1
ITS INTERESTING AND LETS SEE IF IT DOES ANY GOOD TO OUR MACHINES !!

04-28-2003, 06:41 PM	#1 (permalink)
rajnish Senior Member Join Date: Apr 2003 Location: Delhi, , India. Posts: 355	basic tuning for four strokes what i gather is everyone is wary of opening the engine or using high comp.pistons or heads.so the best way of better performence is rejetting the main jet and start by using a 5 num.bigger jet.and go on increasing the jet size by 5 till u get a good setup.if for eg. u go from 115 to 130+ than u need a more unrestricted air filter.also any thing more than 135 u need a bigger pilot jet as well,also turn in air screw a bit to make mixture bit richer and than take it out based on ur feeling of power.gettin'jets is not easy but in delhi u can.this is for better mid and top end.combine this with a front sporcket one teeth smaller for low end.i feel this is most economic and easily done tuning. __________________ \'87 High Torque RD 350B in first gear,6000 rpm,whack the throttle.

04-28-2003, 07:47 PM	#3 (permalink)
rajnish Senior Member Join Date: Apr 2003 Location: Delhi, , India. Posts: 355	well the jets will be of a diff.bikes but will work well.on RD's we use rx 135 jets.that's ok.these r basic mods which can be done by u at home.just need to learn how to open carb.imagine me opening 2 carbs and in end spending time syncronizing them together.or a 350 won't perform.jets can be bought from spare shops.u need info on which bike uses what size main jet.mech.i doubt even know how jets work.ask all the members to post main jet sizes of different bikes. __________________ \'87 High Torque RD 350B in first gear,6000 rpm,whack the throttle.

04-28-2003, 08:43 PM	#5 (permalink)
nav75 Senior Member Join Date: Mar 2003 Location: Pune, India. Posts: 646	Also fitting a dual silencer or a free flow is not that effective on a 4stroke as its on a 2stroke..what u say guys? __________________ 2000 Suzuki Fiero \| 2004 Bullet Electra \| 2004 RX135 \| 2005 CBZ \| 2009 Karizma \| 2009 Punto 1.4 Petrol \| 2011 Yamaha YZF-R15 Nav is back !!! Getting Leh'ed. Since 2007...

04-28-2003, 10:38 PM	#7 (permalink)
krome Senior Member Join Date: Jan 2003 Location: NOIDA, UP, India. Posts: 123	extra weight no good.. __________________ Feuer Frei http://img.photobucket.com/albums/v3...mann/honda.gif http://img.photobucket.com/albums/v3...nner/yummy.gif

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04-28-2003, 07:13 PM	#2 (permalink)
MOKSH Junior Member Join Date: Apr 2003 Location: MUMBAI, MAHARASHTRA, India. Posts: 25	CAN A NORMAL MECHANIC DO THESE KINDS OF MODS. ON THE BIKE ?? CAN I BUY THESE JETS FROM A LOCAL BAJAJ DEALER ??

04-28-2003, 07:58 PM	#4 (permalink)
MOKSH Junior Member Join Date: Apr 2003 Location: MUMBAI, MAHARASHTRA, India. Posts: 25	THANKS DUDE I WILL ASK THEM

04-28-2003, 08:49 PM	#6 (permalink)
MOKSH Junior Member Join Date: Apr 2003 Location: MUMBAI, MAHARASHTRA, India. Posts: 25	YES I AGREE ITS NOT AS EFFECTIVE AS ON THE 2 STROKES BUT IT DEFINITELY ENHANCES THE LOOKS OF THE BIKE !! A P180 WITH A DUAL SILENCER LOOKS MIND BLOWING !! SO DOES A CBZ

04-28-2003, 10:42 PM	#8 (permalink)
MOKSH Junior Member Join Date: Apr 2003 Location: MUMBAI, MAHARASHTRA, India. Posts: 25	I KNOW THE EXTRA WEIGHT IS NOT GOOD ONE OF MY FRIEND GOT AN EXTRA SILENCER ON HIS CBZ AND HAD BIG TIME PROBLEMS HIS BIKE WOULD WOBBLE ABOVE 60 AND HE HAD TO GET RID OF THE EXTRA WEIGHT IMMEDIATELY !! IT AINT GREAT !!

04-28-2003, 10:51 PM	#9 (permalink)
shady Member Join Date: Mar 2003 Location: coimbatore, tamilnadu, India. Posts: 32	yeah moksh... u know i got the silencer put upon the left side and couldn't ride above 60 kmph.. had to take it out man. hey lets check out this jet and stuff sounds intresting.

04-28-2003, 11:02 PM	#10 (permalink)
MOKSH Junior Member Join Date: Apr 2003 Location: MUMBAI, MAHARASHTRA, India. Posts: 25	YES SURELY IT DOES EVEN I HAVE BEEN THINKING ABOUT THIS JETS AND STUFF AFTER I READ IT !1 ITS INTERESTING AND LETS SEE IF IT DOES ANY GOOD TO OUR MACHINES !!

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