u want silent but powerfull izt or scare ur mom know ur mod???

Scare 3 ppl nia, 1st: MOM 2nd: Police 3rd:JPJ Engine tuning

Firstly owners look to increase the power of their engine. Breathing mods ie intake and exhaust are usually the first to be considered. Next up we move on to internal engine modifications ranging from reboring and engine, engine swaps and rebuilding the engine.

This post has been edited by bizzy123: Aug 28 2010, 05:19 PM

jpj & police is the 1 hard to believe it coz some say can some say can't ends up kena saman

zelk.. forgot let u know.. the weather now going to get bad... better come over or else enjoy the rain.. LOL..

ask chris see if can go earlier a bit boh..

he hving dinner with his parents lor. so may a bit slow bah. coz we go by ferry till there.

This post has been edited by 8zelk8: Aug 28 2010, 05:43 PM

oh.. kk.. no wonder...

btw when u bertolak to ur uncle house at bukit merah??

his fish farm.. no blood related.. haha.. 1 uncle who visits the same temple.. LOL.. he build 1 4 storey hse there..in his fish farm.. LOL..

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Added on August 28, 2010, 5:48 pm6.++.. before 6.30pm..

This post has been edited by Aaron135LC: Aug 28 2010, 05:48 PM

huhu... just now mati engine again... =.="

walao kitty cdi really need set higher

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Added on August 28, 2010, 5:50 pmcan go there fishing de boh???

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Added on August 28, 2010, 5:53 pmhv u mod ur bike or not as in interior part aka engine block piston & some others more.

This post has been edited by 8zelk8: Aug 28 2010, 05:53 PM

not fishing.. his fish farm is making busines.. he got over 60++ fish pond.. very big.. depth over my height.. length around 3 or 4 mercedes car... and his pond is arowana fish.. around 20 ekor a pond.. 1 pond cost rm1mil++.. for ppl wanna invest

oh ic, arowana really earn a lot de

Ini stok paip mia CSI pic:

From: yamahat135.com, thanks to bizzy.

Actually, it reminded me of this one:

It's a Bose woofer interior design.

Looking at the design, here are my thoughts:

The manifold ends with a 'cone' shape, and extends with a perforated inline silencer before the exhaust gas enters the silencer chamber.
- The narrowing cut kinda like 2-stroke exhaust. It functions to 'supercharge' the compression as the exhaust pulse bounces back to the exhaust port.

There are 4 resonators, two long at the bottom, and two short above.
- These functions as resonators for different frequency range and making it so quiet.

The final pipe, between the two short resonator, brings the exhaust gas out into the atmosfera.
- From what I can observe, the exit is limited with a small hole.

I would think, first step to make mod to stock pipe without sacrifice the resonators, is to change the final exit hole (the one we can see from the end of the exhaust), making it bigger.

Charge is right, the stock pipe, not good for bikes with lots of fart, it cannot go out fast enough.

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Added on August 28, 2010, 6:44 pmThis is what we saw just now:
This post has been edited by alexei: Aug 28 2010, 06:44 PM

Hmmmm... It is not easy to do that I tink... I hv sms the carb selling guy to ask whether he wana sell the jetting or not but he bo reply

This post has been edited by bizzy123: Aug 28 2010, 08:07 PM

i normally sell 3bold RM170 with PARCEL POS to peninsular malaysia , not include sabah + sarawak.....i stil got 1 ea black leave....if u interesting just pm me la haha.....

ahh, I always like your detail-ness and refined explanation. I know how to do, but explanation wise real sux
the exit hole is big enough for 135cc.

The original design with disconnected pipe means... the gas must fill the tube first before the gas go out via a small hole. low speed ok, as that big piece of tube serve as a gas collector, but at high rpm, everything farked up.

in my opinion, we just need to make a direct connect from the 'honeycomb' pipe to the exit hole. No guarantee 100% is the perfect setting, but at least it will be much better.

I got same opinion wif charge... It becomes a straight flow exhaust system just like car, so it is currently abit like s-flow type rite??? Hehehehe make it straight flow + 1kg of wool I think should be enuf XD

It is currently very S-flow, no wonder it is sooo silent compare to other bike, and at the same time sooo sucky at high rpm. Even though it is undersquare engine, but still, the high end is crippled too much leh..

haha, can do without wool 1st, bcoz we still need some exhaust gas to go into the big chamber.
We can always cut the pipe again and again to put in wool xD

(my car dunno cut how many times ady, but everytime is getting better )

Exhaust pipe tuning is endless...

This post has been edited by charge-n-go: Aug 28 2010, 08:54 PM

Car mia kat bawah cant see ma but for bike gai nia cut a few times whole pipe ada ''parut'' sakit hati lah

haha, sometimes when it looks bad externally, it is a monster internally.