Main jet and stuff for SP..
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can anyone tell mi the configuration for better pickup. i was told to change the main jet to bigger size (not sure wat size, recommandation?) install the air filter. pickup bo power. think my setting all in a mess. anyone can help ?
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jettings should be done in the following order:Originally posted by A_l_a_N:can anyone tell mi the configuration for better pickup. i was told to change the main jet to bigger size (not sure wat size, recommandation?) install the air filter. pickup bo power. think my setting all in a mess. anyone can help ?
is your pipe derestricted?
after that, change your jet size, but i don't ride SP, so i can't help.
after that, get a good air-fuel mix by adjusting the clip to change your jet needle position.
only change the air box/filter when you really need to... don't ever run without your filter... it's bad for the engine and carb...
er.. and after you get that added power, do check your rubbers and brakes.. get better pads or bleed the system...
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rock hard... ride free... -
pipe original (restricted)
all stock stuff except i change to k&n filter.
might be using back the airbox if performance not tat good.
jetting size i also not sure. need someone to advise..
does changing the boyesen power reeds help in any ways? -
original main jet is 152. i'm using 155. if ur pipe is not derestricted, no point changing.. get a K&N air filter..u will feel a slight increase in pickup..
step 1 derestrict ur pipe
step 2 get a K&N air filter( if low budget, u can get OEM one frm LIMAHBOY)
step 3 change ur oil jet( ask ur mech to recommend u, but ur fuel consumption will increase, means u need to go to the petrol kiosk more offen and do this after u derestrict ur pipe, if not no point doing.)
step 4 pay $$
there's more to modifty and create improvement to ur bike.. but the above should be enough to let u feel the difference.. -
if you are using an K&N , then i think your engine will be running lean, have to re-jet . get one size bigger main jet .Originally posted by A_l_a_N:pipe original (restricted)
all stock stuff except i change to k&n filter.
might be using back the airbox if performance not tat good.
jetting size i also not sure. need someone to advise..
does changing the boyesen power reeds help in any ways?
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Speed is Nothing without Control -
tat means i will be using 153 as stated tat 152 is the original. ya im using k&n with normal exhaust pipe.Originally posted by RedSuns4:if you are using an K&N , then i think your engine will be running lean, have to re-jet . get one size bigger main jet . -
Hi HRCnsrSP. Like to know if K&N filter really works? And how much for it? Where u bought it other than LIMAHBOY?Originally posted by HRCnsrSP:original main jet is 152. i'm using 155. if ur pipe is not derestricted, no point changing.. get a K&N air filter..u will feel a slight increase in pickup..
step 1 derestrict ur pipe
step 2 get a K&N air filter( if low budget, u can get OEM one frm LIMAHBOY)
step 3 change ur oil jet( ask ur mech to recommend u, but ur fuel consumption will increase, means u need to go to the petrol kiosk more offen and do this after u derestrict ur pipe, if not no point doing.)
step 4 pay $$
there's more to modifty and create improvement to ur bike.. but the above should be enough to let u feel the difference..
I have unrestricted my exhaust pipe but changed to a smaller oil jet because something wrong with my carburetor. And then I went to another shop, they asked me to change back to original cos oil jet too small, piston might jam when going fast. Anyway, below is the problem:
Whenever my rpm is before 5000 and after 5500, the bike goes smoothly. What happens between rpm 5000 and 5500 is that my bike will start to shake as if not enough fuel or too much fuel rushing in. So I guess between rpm 5000 and 5500, it's when my valve opens, causing this problem.
U happen to know what's the problem?
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--Appreciate what you have now and not what you don't-- -
er...how do u all derestrict the pipe?
issit the muffler part?do it ureself or mechanic do wan?thx
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to live is evil...=) -
i also going to derestrict my pipe. but can i feel the power by juz derestricting the stomach onlY?
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Destrict the pipe normally at the stomach of the pipe. Derestrict at motor shop. For SP, they will open up the stomach by welding it. Then using the same welding tool, they will remove something in the pipe that is restricting the power of the bike. When the pipe is cleared, they will weld back the pipe.Originally posted by sakaratulz:er...how do u all derestrict the pipe?
issit the muffler part?do it ureself or mechanic do wan?thx
I ever tried to destrict at the silencer part too. The mechanic simply remove the middle part of the silencer and drill more holes to allow more power output. But then the pipe then be slightly noiser and sharper.
To counter this, just insert a special type of cotton wool. This cotton will soften the sharpness of the pipe after derestricting. But you have to change this cotton regularly cos it will get dirty and therefore lsing the effect. This special type of cotton is also found in the filter of some air-con.
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--Appreciate what you have now and not what you don't-- -
As some SP riders mentioned, if u going to destrict only the pipe, it's not enough. U have to change the oil jet to something larger as well. And if possible, change the filter to K&N filter. Then a significant change will be felt.Originally posted by A_l_a_N:i also going to derestrict my pipe. but can i feel the power by juz derestricting the stomach onlY?
BUT my advice is, dun modify. Cos the brake system of SP is not very effective, and SP is too light in terms of weight. So if u derestrict your bike, ur bike might give u more power but that also means ur braking system effectiveness will reduce too. So just leave it as it is.
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--Appreciate what you have now and not what you don't-- -
hi,mean time,can help me wif mine???me using PWK 28mm keihin racing carb,original air filter but air filter taken out,pipe operate liao,using oil jet 128 previously,den piston jam.like 2 noe roughly how big must i change to coz now using 130 but like not very smooth in everything leh.any1 using the same carb???
[This message has been edited by SPguy (edited 23 May 2002).] -
i tot sp original oil jet is 155??or too long no bother on sp liao...hmmm....mayb 12+
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Correct me if i am wrong, is keihin racing carburetor belongs to Kawasaki KIPS?Originally posted by SPguy:hi,mean time,can help me wif mine???me using 28mm keihin racing carb,original air filter but air filter taken out,pipe operate liao,using oil jet 128 previously,den piston jam.like 2 noe roughly how big must i change to coz now using 130 but like not very smooth in everything leh.any1 using the same carb???
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--Appreciate what you have now and not what you don't-- -
em....i dunno leh,nv go study abt kips coz none of my frd ride kips.where u heard frm??i dun think its really kips carb coz mine is a racing carb,if every kips carb is racing carb den..........
[This message has been edited by SPguy (edited 23 May 2002).] -
how much u got ur racing carb for... 28mm consider big or small for SP?
wat brand? -
I'm using the K&N air filter. smoother respone. My friend using the OEM from ah boy said is quite ok.. but once the respone become weak, u need to change a new one. 10+ bucks.Originally posted by otacon:Hi HRCnsrSP. Like to know if K&N filter really works? And how much for it? Where u bought it other than LIMAHBOY?
I have unrestricted my exhaust pipe but changed to a smaller oil jet because something wrong with my carburetor. And then I went to another shop, they asked me to change back to original cos oil jet too small, piston might jam when going fast. Anyway, below is the problem:
Whenever my rpm is before 5000 and after 5500, the bike goes smoothly. What happens between rpm 5000 and 5500 is that my bike will start to shake as if not enough fuel or too much fuel rushing in. So I guess between rpm 5000 and 5500, it's when my valve opens, causing this problem.
U happen to know what's the problem?
the problem between the 5k - 5.5k Rpm is normal for all SPs.. don't worry.
And don't change the original oil jet for ur SP. it can harm ur piston, block cos of low fuel combustion, etc.. means lesser lubricant for ur engine.. rather spend more on petrol then a new piston block right?
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152/3 depends on number plate tooOriginally posted by tRanCE:i tot sp original oil jet is 155??or too long no bother on sp liao...hmmm....mayb 12+ -
that's clearing carbon + making ur bike lighter.. thus sight improvment in pickup..Originally posted by A_l_a_N:i also going to derestrict my pipe. but can i feel the power by juz derestricting the stomach onlY?
derestrict ur sliencer with the stomach to see better peformance. -
Originally posted by SPguy:
PWK 28mm keihin racing carb <== this carb is not killing ur petrol comsuption? not advisable to change ur carbby, unless u always race. if u change ur carb, change ur oil jet to a larger size.
[B]hi,mean time,can help me wif mine???me using PWK 28mm keihin racing carb,original air filter but air filter taken out,pipe operate liao,using oil jet 128 previously,den piston jam.like 2 noe roughly how big must i change to coz now using 130 but like not very smooth in everything leh.any1 using the same carb???
/B] -
ok guys, i think im gonna go down and operate the stomach of my pipe. see if theres any changes den i update u guys. gee
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Hi HRCnsrSP. So u know what's the original size of oil jet for FP plate SP? How much larger should i change to?
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--Appreciate what you have now and not what you don't-- -
either 152/153 . could not remember(should be 153). u riding FP plate SP ? where u staying? might see ur bike before.Originally posted by otacon:Hi HRCnsrSP. So u know what's the original size of oil jet for FP plate SP? How much larger should i change to?
how much larger u have to ask ur reg mech. i'm not qualify for recommendation
[This message has been edited by HRCnsrSP (edited 23 May 2002).] -
$250 wif jettings made,but 128 too small.Originally posted by A_l_a_N:how much u got ur racing carb for... 28mm consider big or small for SP?
wat brand? -
Originally posted by HRCnsrSP:
PWK 28mm keihin racing carb <== this carb is not killing ur petrol comsuption? not advisable to change ur carbby, unless u always race. if u change ur carb, change ur oil jet to a larger size.
[QUOTE]Originally posted by SPguy:
[B]hi,mean time,can help me wif mine???me using PWK 28mm keihin racing carb,original air filter but air filter taken out,pipe operate liao,using oil jet 128 previously,den piston jam.like 2 noe roughly how big must i change to coz now using 130 but like not very smooth in everything leh.any1 using the same carb???
/B]
[/QUOTE]
roughly wat size???currently increase by 2 frm 128 to 130.