1997 RX-Z Restored!

1997 6-Speed RX-Z Restoration Project

Do you still remember the picture above? It is about a Yamaha RX-Z bike that I bought for RM500+ that I’m going to restore sometime in May 2008.
Now, the restoration has finished. Enjoy the picture below and look for the original look for the bike before any restoration has been done.
Newly painted engine cover but the kick starter has not been replaced yet since there is no stock for the original one
Carburetor is new since the old one is very dirty and hard to clean
New rims, tyre, hub, rear footrest but old exhaust painted to black
Definitely restored to full glory 

Nicely done in black with green stripe

There is nothing more satisfying other than looking at the bike that once is hedious and teribble but now looking like new and full of spirit.
Remember to read the previous look of this bike here!

Illegal Yamaha 125Z Racing Bike

This article is taken without permission from http://www.mysportbikers.com/portal/index.php?
Hope they will forgive me!

Please go here for the original content of the page.

What was modded on that bike…?
block and piston
– Original Yamaha 125zR block.
– Bored tu 57mm using DT125(enduro) RK brand piston.
– Ported and polish the block.

Engine head
– OEM header.
– Skimmed the header and polished it.

– Standard Y125z manual clutch system.
– Original Yamaha friction plate.
– GT Racing clutch springs.

Actually that bike got 2 carburetor unit.
– Carb Mikuni for Suzuki Panther 150. [Main jet 300, pilot 28.5]
– Keihin PWK 28mm. Ported to 30mm. [unknown]
– paired with FCCi Racing reed valve.

– Fully Standard. Even the CDi is standard.

– BM Power + YY Pang exhaust manifold + custom made end can silencer.

– Standard OEM front and rear suspension system.

Final drive
– Using 15/34 MCS sprocket setup with TP Racing 415 chain.

– COM* 17×1.4 alloy rims with hi-polish 125z hubs.
– Camel 50/90 tyre. very2 kecik punya tayar.

– Standard front disc brake system.
– Rear disc brake system was removed due to no use of using it.


– None. This bike was staying in the house all the time except when it was needed on the road.

Which shop do all this ?
– my friend’s house. Of coz la this is his bike.

How fast can it go ?

– 180km/h on 4th gear. after that cant calculate due to meter limit is only at 180km/h.
– 16sec for a kilometer.


CDI + Circuit Breaker / Rev-limiter / Cut-off Switch

CDI is known to give spark to the running engine, whether it is 2-stroke or 4-stroke. Inside a standard CDI circuit, there is a circuit breaker or rev-limiter or cut-off switch which limit the revolution of the engine. How does it work? Read on the article taken from Wikipedia. This article is about electrical circuit breaker but it can be used to relate to rev-limiter or cut-off switch in engines. In fact, we can’t get away from electrical system when we are discussing about engines.

A device to open or close an electric power circuit either during normal power system operation or during abnormal conditions. A circuit breaker serves in the course of normal system operation to energize or deenergize loads. During abnormal conditions, when excessive current develops, a circuit breaker opens to protect equipment and surroundings from possible damage due to excess current. These abnormal currents are usually the result of short circuits created by lightning, accidents, deterioration of equipment, or sustained overloads.

Formerly, all circuit breakers were electromechanical devices. In these breakers a mechanism operates one or more pairs of contacts to make or break the circuit. The mechanism is powered either electromagnetically, pneumatically, or hydraulically. The contacts are located in a part termed the interrupter. When the contacts are parted, opening the metallic conductive circuit, an electric arc is created between the contacts. This arc is a high-temperature ionized gas with an electrical conductivity comparable to graphite. Thus the current continues to flow through the arc. The function of the interrupter is to extinguish the arc, completing circuit-breaking action.

In oil circuit breakers, the arc is drawn in oil. The intense heat of the arc decomposes the oil, generating high pressure that produces a fluid flow through the arc to carry energy away. At transmission voltages below 345 kV, oil breakers used to be popular. They are increasingly losing ground to gas-blast circuit breakers such as air-blast breakers and SF6 circuit breakers.

In air-blast circuit breakers, air is compressed to high pressures. When the contacts part, a blast valve is opened to discharge the high-pressure air to ambient, thus creating a very-high-velocity flow near the arc to dissipate the energy. In SF6 circuit breakers, the same principle is employed, with SF6 as the medium instead of air. In the “puffer” SF6 breaker, the motion of the contacts compresses the gas and forces it to flow through an orifice into the neighborhood of the arc. Both types of SF6 breakers have been developed for ehv (extra high voltage) transmission systems.

Two other types of circuit breakers have been developed. The vacuum breaker, another electromechanical device, uses the rapid dielectric recovery and high dielectric strength of vacuum. A pair of contacts is hermetically sealed in a vacuum envelope. Actuating motion is transmitted through bellows to the movable contact. When the contacts are parted, an arc is produced and supported by metallic vapor boiled from the electrodes. Vapor particles expand into the vacuum and condense on solid surfaces. At a natural current zero the vapor particles disappear, and the arc is extinguished. Vacuum breakers of up to 242 kV have been built.

The other type of breaker uses a thyristor, a semiconductor device which in the off state prevents current from flowing but which can be turned on with a small electric current through a third electrode, the gate. At the natural current zero, conduction ceases, as it does in arc interrupters. This type of breaker does not require a mechanism. Semiconductor breakers have been built to carry continuous currents up to 10,000 A.

Yamaha 125ZR 2007 Sticker Design

The current design of Yamaha 125ZR since 2007. The design of the bike is nice, simple and macho enough. It was debut in 1999 with the first generation of 125Z and later followed up with 125ZR, which better and meaner.

Technical Specification
Overall length x width x height
1,900 x 675 x 1,035 mm
Total Displacement
Seat Height
752 mm
Wheel base
1,250 mm
Minimum Ground Clearance
135 mm
Dry weight/ Curb weight
101 kg
Engine oil capacity
1.2 litre
Ignition system
Digital-advanced magneto type CDI
Constant mesh 6-speed
Brake front / rear
Single disc brake

At that time, there is no bike in the category that can compete with the bike. It was the era of Suzuki Best, Suzuki RG Sports, Yamaha SS, SS Two and Kawasaki K1, but none of the bike make a very deep impact like 125Z does. 125Z makes every other bike in the category seems like child plays. The technology offered by 125Z is far superior than what the people were thinking at that time and Yamaha was ahead in others in thinking of future of underbone bike.

I like this bike not because I want to rem pit, but I like what this bike has to offer.
You see, this is the only bike in the category that have monoshock suspension, front and rear disc brake, 6-speed gear, futuristic design and affordable!

Also, this bike is really fast. In standard condition, it can go up to 160km/h, tune the exhaust a bit, it’ll go up to 180km/h, tune it a little bit more, then you can’t measure the speed anymore since the meter is maxed at 180km/h!
I have heard that this bike can be tune to get 180 km/h just in the fourth gear.

Safety will become a thing to think here. Enjoy the speed only in the track. Not in public highway. Drive safely and be smart!

Also watch out for:

Yamaha LC135 2007 Catalogue

Yamaha LC135 (Auto Clutch) 2007. Price is estimated RM6400 (OTR). Pricelist is here: http://motomalaya.net/blog/category/pricelist/

Check out other Yamaha motor catalogue:
Yamaha FZ-150i 2008 Catalogue
Yamaha RX-Z 2007 Catalogue
Yamaha RX-Z 2002 Catalogue

Coming soon:
Yamaha LC135 Extreme Spirit 2007 Catalogue
Yamaha 125Z 2007 Catalogue. POSTED: Click here

Keep this link in your bookmarks or subscribe to RSS feeds to get the updates.

History Of Yamaha Corporation (How Yamaha Started Making Good Motorcycles)

Yamaha was founded in 1887 as a piano and reed organ manufacturer by Torakusu Yamaha as Nippon Gakki Company, Limited (日本楽器製造株式会社 Nippon Gakki Seizō Kabushiki Gaisha) in Hamamatsu, Shizuoka prefecture, and was incorporated on October 12, 1897. The company’s origins as a musical instrument manufacturer is still reflected today in the group’s logo — a trio of interlocking tuning forks.[3]

After World War II, company president Genichi Kawakami repurposed the remains of the company’s war-time production machinery and the company’s expertise in metallurgical technologies to the manufacture of motorcycles. The YA-1 (aka Akatombo, the “Red Dragonfly”), of which 125 were built in the first year of production (1954), was named in honor of the founder. It was a 125cc, single cylinder, two-stroke, streetbike patterned after the German DKW RT125 (which the British munitions firm, BSA, had also copied in the post-war era and manufactured as the Bantam and Harley-Davidson as the Hummer). In 1955, the success of the YA-1 resulted in the founding of the Yamaha Motor Co., Ltd.

Yamaha has grown to become the world’s largest manufacturer of musical instruments (including Pianos,“silent” pianos, drums, guitars, violins, violas, celli, and vibraphones), as well as a leading manufacturer of semiconductors, Audio/Visual, computer related products, sporting goods, home appliances and furniture, specialty metals, machine tools, and Industrial robots.

In October 1987, on its 100th anniversary, the name was changed to The Yamaha Corporation.

In 1989, Yamaha shipped the world’s first CD recorder. Since then, Yamaha has purchased Sequential Circuits in 1988 and bought a significant share (51%) of competitor Korg in 19891993.

It acquired German Audio Software manufacturers Steinberg in 2004, from Pinnacle Systems.

In July, 2007, Yamaha bought out the minority shareholding of the Kemble family in Yamaha-Kemble Music (UK) Ltd, Yamaha’s UK import and musical instrument and professional audio equipment sales arm, the company being renamed Yamaha Music U.K. Ltd in autumn 2007.[1] Kemble & Co. Ltd, the UK piano sales & manufacturing arm was unaffected.[2]

On December 20, 2007, Yamaha made an agreement with the Austrian Bank BAWAG P.S.K. Group BAWAG to purchase all the shares of Bösendorfer[3], intended to take place in early 2008. Yamaha intends to continue manufacturing at the Bösendorfer facilities in Austria.[4]The acquisition of Bösendorfer was announced after the NAMM Show in Los Angeles, on 28 January 2008. As of February 1, 2008, Bösendorfer Klavierfabrik GmbH operates as a subsidiary of Yamaha Corp.[5]

Yamaha Corporation is also widely known for their music program that began in the 1980s.

Other companies in the Yamaha group include:

  • Bösendorfer Klavierfabrik GmbH, Vienna, Austria.
  • Yamaha Motor Company
  • Yamaha Fine Technologies Co., Ltd.
  • Yamaha Livingtec Corporation
  • Yamaha Metanix Corporation
  • Yamaha Pro Audio

Yamaha Motor Company Limited (ヤマハ発動機株式会社 Yamaha Hatsudōki Kabushiki-gaisha) (TYO: 7272), a Japanese motorized vehicle-producing company (whose HQ is at 2500 Shingai, Iwata, Shizuoka), is part of the Yamaha Corporation. After expanding Yamaha Corporation into the world’s biggest piano maker, then Yamaha CEO Genichi Kawakami took Yamaha into the field of motorized vehicles on July 1, 1955. The company’s intensive research into metal alloys for use in acoustic pianos had given Yamaha wide knowledge of the making of lightweight, yet sturdy and reliable metal constructions. This knowledge was easily applied to the making of metal frames and motor parts for motorcycles. Yamaha Motor is the world’s second largest producer of motorcycles. It also produces many other motorized vehicles such as all-terrain vehicles, boats, snowmobiles, outboard motors, and personal watercraft.

In 2000, Toyota and Yamaha Corporation made a capital alliance where Toyota paid Yamaha Corporation 10.5 billion yen for a 5 per cent share in Yamaha Motor Company while Yamaha and Yamaha Motor each bought 500,000 shares of Toyota stock in return.

[Source: Wikipedia]