Throttling problems on SP

[dreme]

Hi guys, whenever I throttle to about 5k rpm, i get a choking sound... feels as if the bike is taking in air. Slight vibrations too. This happens for almost every gear, being most prominent at gear 2. The only way to avoid this seems to be to full throttle everytime to chiong past the 5k rpm mark.

 

Can anyone pls advise on what's wrong?

[DeXirant]

ya..i have da same prob as u..haha..tink its normal for sp ar..

[xiaobanz]

Haha i've asked the same qns as you a few months back when i first gotten my SP. Btw it's common in SP. From what i know is that the first valve is about to open but due to insufficient rpm it doesn't open. Try revving higher rpm and the prob will go off. You will feel a slight torque pull feel once the valve opens.

[SinFilled]

If you remain constant at 5krpm does it feel like the bike has no power?

 

My SP when travelling at around 70km/hr constant can hear like no power like that but everything is alright when i reach past 80km/hr

[dreme]

If you remain constant at 5krpm does it feel like the bike has no power?

 

My SP when travelling at around 70km/hr constant can hear like no power like that but everything is alright when i reach past 80km/hr

 

Yup, there's like no power. In fact, I feel as if I'm being dragged along. Not sure how to describe the feeling... SP riders would know, I guess.

 

I don't think it's normal for SP though. This makes it impossible to cruise at 5k rpm. I also think that it will be bad for FC.

[nihaoma]

hmm..wat i suggest is change your gear after 5k rpm loh...at 6th gear...maintance it after 5k rpm and should be fine rite??becos if i dun remember wrongly,6k rpm is 100km/h...

[dreme]

There's a lack of power during transition... it's quite obvious, especially when you are moving off from a stationary position. So it's not just about cruising at a fixed speed... my bad.

[SinFilled]

actually if ur those kind who wack throttle it shouldnt be a prob haha becoZ i've tried to wack b4 and by the time i reach the tip of 4th gear im oreadi at 100km/hr but since you said even moving off from stationary position you're also encountering power loss problem, try playing around with ur biting point 1st.

 

becoZ i've tried a few of my fren's SP, some of their clutch have to release quite alot to get biting point while others onli need to release very little bit to find their biting point

 

Final solution, bring to mech and check hehe

[Toyota23]

What is Yr 2T level??? MID??

[coldblizzard]

If we're talking about the same thing, I think I get it about how it sounds like. Mine also happens, at RPM 5k start to like choke choke. Then when I stop, the idling speed can go below 1k, then engine stall at traffic light. -_-

 

However, this only happens to me early morning/heavy rain. Worse case scenario is when it rains heavily in the morning, that 1 damn jialat, have to like throttle to keep my RPM above 1k at traffic lights. But after I hit expressway just whack then later okay already, idling speed somewhat normal, so I thought it was my engine cold or something.

[Simmz]

Hi guys, whenever I throttle to about 5k rpm, i get a choking sound... feels as if the bike is taking in air. Slight vibrations too. This happens for almost every gear, being most prominent at gear 2. The only way to avoid this seems to be to full throttle everytime to chiong past the 5k rpm mark.

 

Can anyone pls advise on what's wrong?

 

It's time for u to send your bike for a top servicing liao. Decarbonize and clean those dirty engine part..

[dreme]

What is Yr 2T level??? MID??

 

Full. 1 liter.

[dreme]

It's time for u to send your bike for a top servicing liao. Decarbonize and clean those dirty engine part..

 

I just did servicing... My mechanic asked me to return to see him again though. Offers to fix it for free.

[honda_lover]

altho im riding a rr. i do face the same prob.

 

but i asked arnd. diff ppl gave diff ans. im rather confused.

some say is the jetting.

some say is the cable.

 

erm is there a confirmed ans ?

 

cherrs! =]

[Simmz]

I just did servicing... My mechanic asked me to return to see him again though. Offers to fix it for free.

 

That's good. Better get it check before problem comes..

[Simmz]

altho im riding a rr. i do face the same prob.

 

but i asked arnd. diff ppl gave diff ans. im rather confused.

some say is the jetting.

some say is the cable.

 

erm is there a confirmed ans ?

 

cherrs! =]

 

Also when riding to a certain RPM you'll feel like something stuck? But muz keep on dragging untill it clear? May i know when is your last servicing? What did you do?

[ost28]

hmm..

i think u shud clear ur valve before every move off

as in drag untill u clear all the white smoke then ride normally ..

try it..

[honda_lover]

Also when riding to a certain RPM you'll feel like something stuck? But muz keep on dragging untill it clear? May i know when is your last servicing? What did you do?

 

hmm.. i jus got my bike 3 months back .. is it time for servicing? hahahs!

[dreme]

altho im riding a rr. i do face the same prob.

 

but i asked arnd. diff ppl gave diff ans. im rather confused.

some say is the jetting.

some say is the cable.

 

erm is there a confirmed ans ?

 

cherrs! =]

 

Actually mine's a NSR rr too!

[Mitsuki]

hmm..

i think u shud clear ur valve before every move off

as in drag untill u clear all the white smoke then ride normally ..

try it..

 

 

 

yeahh i got this problem on my FS 150 too.

 

 

get this terrible choking and unbearable vibrating when i try to cruise at arnd 4.7k rpm to 5.3k rpm in gears 2 and above

 

 

 

problem solved when i start my bike, still on neutral, i give her a goooood rev (AT least 6k rpm)

 

then after that the ride tends to be smoother.. after loads of experimenting!! lol.

 

 

 

i noticed if i open valve on expressway, the weird choking is gone. But if ride normally, the choking will be present all the way. once clear valve constantly then ok le (so must be carbon build up).

 

 

 

just went for tuning at planet motor, and the choking is reduced..

[honda_lover]

yeahh i got this problem on my FS 150 too.

 

 

get this terrible choking and unbearable vibrating when i try to cruise at arnd 4.7k rpm to 5.3k rpm in gears 2 and above

 

 

 

problem solved when i start my bike, still on neutral, i give her a goooood rev (AT least 6k rpm)

 

then after that the ride tends to be smoother.. after loads of experimenting!! lol.

 

 

 

i noticed if i open valve on expressway, the weird choking is gone. But if ride normally, the choking will be present all the way. once clear valve constantly then ok le (so must be carbon build up).

 

 

 

just went for tuning at planet motor, and the choking is reduced..

 

hello bro. dun mind me asking ... what;s tuning n wad does it do?

 

and also how much does it cost ahs??

 

thanks in advance=]

[adesmond2]

lol... yo bro... that's a few kindas of tunings... One is purely idling... another one is fuel and air intake... it makes your bike smoother lor.. but FC might increases..

 

Cost? depends on wat you have done and normally tuning is FOC...

[honda_lover]

is there any reccomendation to the ratio? n y will fc increase ah?

[adesmond2]

in the event that you have increase your fuel intake and air intake to make your ride more smooth and "power", fuel intake increases thus FC increase..

 

Recommendation? depending on the hardware you have at your carb and the mechs will tune for you accordingly...

[Mitsuki]

yay me tune at planet motorss for free!

 

basically more power = more petrol = more $$$$