Throttling problems on SP

[adesmond2]

haha.. more power = more petrol = more $$$... nice one...

[honda_lover]

then maybe i jus endure the choking. LOLS. no money not enough ahs!

[kwanheng]

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?

 

i asked the shop they said its the valve never open at 5k rpm it only open at 6k-7k rpm and they said riding a sport bikes should not be smooth. As the valve open at 6k-7k when moving off you must drag gears.

[Simmz]

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

 

What kind of 2T did you use? low grade 2T would cause excess of 2T trap in the pipe. Therefore it became carbon. Another thing is also the bike has been laid for a long time. Without starting or warming up the engine, carbon will start to form up.

 

It might also lead to dirty carburetors, usage of air filter and open port will eventually dirty the carburetor faster than usage of air box.

[Simmz]

i asked the shop they said its the valve never open at 5k rpm it only open at 6k-7k rpm and they said riding a sport bikes should not be smooth. As the valve open at 6k-7k when moving off you must drag gears.

 

You sound like riding a S4 Vtec sia. Haha. But that's true. Some SP have this problem whereby vavle cannot open due to the dirt in it. So that's why it's recommend to do a full servicing once every 6 mths.

[craz_03]

ehh..

i used to have this prob..

even after decarbonizing @ planet..

ah chong helped me tuned the first time.. but didnt succeeded..

in the end.. still loss of power more than ever.. n petrol fc dropped from 200km to 150km per full tank..

den engine died next few days later.. towed to planet...

checked.. tuned.. still ard the same..

 

den i brought back to my old mech ah meng @ sungei kadut..

he see liaoz.. reved... den open my airbox.. drilled afew holes . den tuned..

den the bike became more powerful den ever.. lol ( its an sp btw...)

 

n my fc improved to 230-250km nowadays even though the power is there n i also open throttle.. i change my gear at 5+-6k rpm... n normally cruise at 100km on meter.. ( which is 6k+rpm on the speedo)

[craz_03]

if any sp's need any help.. i might be glad to bring u guys over to ah meng n let him check on the sp's problem...

 

really a trusted mech i could say.. =)

n u pay for his gd services....

[queirtus]

nice to hear that bro craz,

[craz_03]

no prob.. =)

rode sp 3 yrs liaoz.. time to change to super 4 also.. haahaa..

going to sell away my sp soon liaoz..

[barefoot]

nsr500 is waiting for you =)

[craz_03]

ehhh 2a up to 400 nia.. lol

[queirtus]

lol nsr 500 still exist?

[craz_03]

maybe he toking abt nsr 250.. pgmIV

[Simmz]

There is NSR500.. But damn rare already.. PGM NSR250 consider rare already.. This NSR500 is much more rare than ever! If singapore still exist.. i think it's about less than 30 unit left liao..

[Simmz]

(Extracted from http://en.wikipedia.org/wiki/Honda_NSR500 )

The Honda NSR500 is a race motorcycle from the Honda NSR series. It was created by HRC (Honda Racing Corporation) and debuted in 1984 for the Grand Prix motorcycle racing's 500 cc class. Honda won ten 500cc World Championships with the NSR500 from 1984 to present, six in a row 1994 to 1999. With more than 100 wins to its credit, the NSR500 is the most dominant force in modern Grand Prix motorcycle racing. The 1989 NSR500 that won Honda's third 500 World Championship with Eddie Lawson exemplifies the overwhelming power, acceleration and raw speed that has always been synonymous with Honda's 500 cc two-stroke V4.

[queirtus]

wow that means nsr 500 is a legend bike!

[kguanz]

hey guys.. if often nv open valve, will the valve become jammed or choked?

[craz_03]

err...

same goes to.. if a husband nv f*** his wife often...

the wife also will get rusty..

haahaa..

 

jk.. but the logic is there.. try to try valve till 7 - 8k rpm often lo...

coz its only 100+km- 115km+- ... n the meter u need to minus ard 15-20km to get the exact spd..

[queirtus]

its impossible not to open valve man, coz im sure at least u will travel in expressway at least once in almost every trip ure going with ur bike.

 

on expressway surely open valve one. unless u really ride 80 all the way

[craz_03]

its impossible not to open valve man, coz im sure at least u will travel in expressway at least once in almost every trip ure going with ur bike.

 

on expressway surely open valve one. unless u really ride 80 all the way

 

tats me now.. nv open valve due to running in the engine.. haahaa

[queirtus]

wah running in? u changed wat?

[craz_03]

block , piston n piston ring... hahaha..

my block got a knock inside...

so no choice..

now @ 100km only.. left 400km.. tml another 100... n the list goes on..

 

hahaa..

but ok la.. well maintained bike also.. =)

feels new to me..

[queirtus]

nice yo craz where do u do all this things man?

[craz_03]

me?

woodlands ah meng is called by most of his customers..

i juz call him ah meng bah... he's at sungei kadut..

 

http://www.singaporebikes.com/forums/showthread.php?p=4740895#post4740895

 

one of the sp he juz solved..

[kguanz]

block , piston n piston ring... hahaha..

my block got a knock inside...

so no choice..

now @ 100km only.. left 400km.. tml another 100... n the list goes on..

 

hahaa..

but ok la.. well maintained bike also.. =)

feels new to me..

 

wah bro.. u change block all these how much is the damage?

 

hmm as in nv fully open valve mah.. normally 7 then fully open.. i often travel ard 6 or 6.5 in expressway.. haha