Attention!

We have moved to http://motomalaya.net/

Monday, June 29, 2009

Why LC135 have only 4-speed gear and 125Z have 6-speed gear?

LC135 is 4-speed and 125Z have 6-speed: Why?

Have you ever wonder about this? Why is it the marvelous and lovable Yamaha LC135 only have 4-speed gear and Yamaha 125Z having additional 2 speed gear? Is Yamaha neglected the important aspect of speeds and thrills? Well, I have been thinking about this for a while and tried to find out why. Here is what I've found out...
The reason why Yamaha 125Z needed to have 6-speed gear is due to narrow powerband that is natural for 2-stroke engine. 2-stroke engine needs RPM more than 5000 (depends to the cc) to deliver its optimum torque, whereby 4-stroke engine can deliver the optimum torque from as low as 1500 RPM. So, because of this, 2-stroke engine needs to have a lot more gear than 4-stroke engine to make sure the torque can be spreads out all along the speed (km/h) starting from low speed to very high speed.

For example, LC135 can run on 4th gear as low as 20km/h and from there you can also speeds up to 160km/h without hesitation from the engine. Try this on your 125Z, and tell me how does it feels.

As you can see, having only 4-speed gear on LC135 is not a disadvantage, it is the nature of 4-stroke engine that have wide powerband. But, I think it is also not a wrong decision if Yamaha engineers decides to make LC135 being 6-speeder! More power, more fun!

Drive safely!

For more info about 2-stroke engine, click here.

Sunday, June 28, 2009

MCS 15-37T 415 Sprocket for Yamaha bike

MCS 15T Front Sprocket

MCS 37T Rear Sprocket

MCS is one of the sponsor of Malaysian Cub Prix. The quality has been proven in races in the series. 415 series sprocket and chain is considered race chain setup due to its closer teeth configuration and obviously lighter in weight compared to 428 and 420 setup.
The problem with 415 setup is that it is easy to wear out and hence, needs a more frequent maintainance and replacing.

Saturday, June 27, 2009

Greece Yamaha 135LC Fitted with AHM Black Muffler Exhaust

Greece Yamaha 135LC Fitted with AHM Black Muffler Exhaust

Close-up view

This picture is sent to me by Nikolaos Stamatakis in Heraklion, Greece. He has fitted his bike with the black AHM muffler that has been featured recently in MotoMalaya. In Greece, Yamaha 135LC is known as Yamaha Crypton.
I like the execution of this black AHM muffler to the black 135LC. It looks mean and very simple. There are also a lot of muffler colour such as gold, silver, red, carbon fibre and titanium, but they are not easy to find especially the one in colour gold.
Thanks to Stamatakis for the pics. Happy motoring Greece!

Friday, June 26, 2009

Yamaha RXZ Catalyzer Original Mikuni VM26 Carburetor

Yamaha RXZ Catalyzer Original Mikuni VM26 Carburetor

Made in Thailand but the quality is high according to Mikuni carburetor of Japan. I have used this one in fact to one of my bike and it is as good as the one which comes with the bike.
The problem with the non-original carburetor is that it is very hard to do the setting. The thread of the air screw is not made precisely as needed. Even if you manage to set it to good setup, the thread tends to adjust itself to improper position.
This carburetor doesn't have that problem. It is good to go. And if you notice, the slide inside the carburetor is in black colour.
VM26 means the carburetor size is 26mm.

Tuesday, June 23, 2009

Brembo Disc Plate for Motorcycle Use

Brembo Disc Plate for Motorcycle Use

Monday, June 22, 2009

Honda Wave 125 Illumination Meter

Honda Wave 125 Illumination Meter

My friend emailed me this image. I'm not sure where does he took this from. Maybe from some forum on the net. Anyway, it is a good picture about the implementation of illumination meter to Honda Wave 125.

Yamaha 135LC AHM Black Muffler

Yamaha 135LC AHM Black Muffler

Saturday, June 20, 2009

Denso Spark Plug for Yamaha RX-Z (similar to NGK BP8ES)

Denso Spark Plug for Yamaha RX-Z

Denso W24EP-Us is similar to NGK BP8ES

click to enlarge

U-grooved electrode for better spark arcing

click to enlarge

Friday, June 19, 2009

Yamaha 135LC Original Disc Plate

Yamaha 135LC Original Disc Plate

Some people like to modify their bike to use bigger disc plate, which looks nice. That kind of disc plate might cost you about RM200+.
But if you try to buy the original one, it might set you back to RM300+ for the standard size disc plate.
For me, I prefer the original ones as it is much tougher and more durable than the aftermarket parts. Not that the aftermarket parts is not good, it is just can't match the quality of original parts. I have seen one original disc plate fitted to a 10 year old Yamaha bike and still usable up to this point. The disc plate has thinned down but not much, maybe just 1mm. Disc plate is not something you change frequently, it is the brake pad that needs the love and care. But do you care about the brand and originality of your brake pad?

Yamaha 135LC Radiator Cover / Coolant Protector

Yamaha 135LC Radiator Cover / Coolant Protector

This radiator cover is a new and improved version of the previous Yamaha logo radiator cover. Now, it includes the net at the back of the cover to protect your precious radiator fins from stones and any debris from the road. This one is a good buy and should not be expensive.

Thursday, June 18, 2009

Yamaha RX-Z Original Silencer

Yamaha RX-Z Original Silencer
(click to enlarge)

Sunday, June 14, 2009

Yamaha 135LC Big Valve Head

Yamaha 135LC Big Valve Head

Intake 19mm, exhaust 22mm

Not original but price is about RM800

Saturday, June 13, 2009

KSE Racing Exhaust for Yamaha RX-Z

The KSE is much shorter that the stock exhaust

Click to enlarge

Click to enlarge

The chamber much thinner compare to stock exhaust chamber

Click to enlarge

KSE Racing Exhaust for Yamaha RX-Z

Head of the exhaust is much wider than stock

Straight flow construction

Smaller/thinner chamber mean this one is for top RPM power

Nice welding, well made

Clean muffler design that looks much like the stock

Silencer provided here is loud, you can change to silent one

KSE Racing Pro Racing Exhaust

Saturday, June 6, 2009

Rextor Adjustable CDI for Yamaha 135LC

Rextor Adjustable CDI for Yamaha 135LC

Specifications and features Rextor Adjustable CDI for Yamaha 135LC

Top view of Rextor Adjustable CDI for Yamaha 135LC

Knob to adjust the Rextor Adjustable CDI for Yamaha 135LC

Three main things here; CDI input, fan input and adjuster knob for Rextor Adjustable CDI for Yamaha 135LC

The picture is in medium resolution. Click it to enlarge.
Item is found at SCK Motor, Shah Alam. Price is RM800++.

SSS 428 Gold Roller Chain

SSS 428 Gold Roller Chain

Contains 120 links (chain units)

Monday, June 1, 2009

Mikuni VM Carburetor Super Tuning Manual (PDF)

Mikuni VM Carburetor Super Tuning Manual (PDF)

I have stumble upon this very precious and detailed information provided by Mikuni American Corporation about Mikuni carburetor which is commonly used in Yamaha bikes especially Yamaha RX-Z and Yamaha 125Z.
The file is in PDF form and it is a very good read if you want to tune your carburetor whether to race or just daily usage and fuel efficiency.
I want to thanks Mikuni American Corporation for providing this good read for us to do our own tuning with proper guidance.
The file can be downloaded here

Attention!

We have moved to http://motomalaya.net/