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Spek detail dari Honda CBR 150
Detailed Specs of Honda CBR 150 ADA disini

It is said that Casey Stoner, Australian MotoGP rider started out on a Honda CBR150. What is the Honda CBR150 technical; the CBR150 comes with a 4 stroke, DOC 4 Valves, water-cooled 149.4cc engine. The cylinder bore is 63.5mm and the stroke is 47.2mm (We can several other smaller cc motorcycle from Honda with the same bore), the compression ration is 11:1 and the ignition is by CDI Direct.

The standard spark plug is an NGK CR8E, but seen also CBR150’s with a Denso U24ESR-N.

The transmission of Honda CBR150 comes with a 6 gear transmission, with a gear ratio from 3.038 for the first gear and a ratio of 0.923 for the last (6th) gear. Honda is using a wet, multiple disk clutch type for this motorcycle.
The dimensions of the bike are 652mm wide by 1,910 in length and 1,065 mm high. With a wheelbase of 1,286mm, all this specification indicates that it is a well-suited motorcycle for some road racing.

The dry weight of the bike is 115kilograms; the full fuel tank capacity is 10 liters unleaded gasoline octane 91 and up.

We need to keep focusing on performance that’s affordable. This keeps us from manufacturing some tailor made individual parts to get the exact performance needs; also changing the bore or coating the cylinder bores with a Ceramic Coating is off they all fall out of the budget.

Okay looking at the standard bike, we are thinking what can we change to get at least some better performance. In the corner of my eye I see my girlfriend walking around with a block of aluminum, assuming that we are going to make a whole new cylinder. But after a quick telephone call with the bike owner, we concluded that it was far out of the budget.

So without the manufacturing of custom made parts we are restricted to the exhaust pipe, air-intake and carburetor. The exhaust pipe is the easiest part, we just bough a racing exhaust set. The air-intake was also easy; we just made the holes bigger so the air can flow much easier into the carburetor. Adjusting the main carburetor main fuel jet, and keeping track on the max and idle performance we got almost 32km/h more speed out of this bike. As we where examined the bike we also found that the chain and sprockets had to be replaced, as the bike clearly ad some more power we selected a small rear and a few teeth bigger front sprocket. The bike was now a fast little monster.
Upgrading a Honda CBR-125R to a CBR-150R

Modify & MaintenanceAs the Honda CBR-125R get more popular, the Honda CBR125 is Britain's top-selling motorcycle for several years. The Honda CBR-125R is a fantastic road legal learner bike perfect for first time rider.

The Honda CBR-125R with its Liquid-cooled, two-valve, single-cylinder, four-stroke, 124.7cc engine produces enough power to get first time riders experience the feeling of riding a sporty bike. But after about one year, most Honda CBR-125 owners want to sell the bike as the 13 horsepower engine doesn’t provide enough power.
But why sell the bike, if you can for as little as 10,000 Baht (217 Euro, or 294 US$) can upgrade the big to a CBR-150R, with original Honda parts. The differences between the Honda CBR-125 and his bigger Thai brother the Honda CBR-150 is only the cylinder, piston and cylinder head assembly.

Buying the original Honda CBR-150 part is for people who plan to visit Thailand for a holiday no problem at all, it is not uncommon that foreigners buy this ‘150cc upgrade kit’ says a shop owner who also shows us quickly several more Honda CBR upgrade variants starting from 130cc to all the way up to 195cc. This third party bore-up sets are even cheaper then the original Honda 150cc set.

The shop owner explains us that with the 195cc bore-up kit, which includes a sport camshaft, piston, cylinder, cylinder head assembly which includes larger DOHS 4-valves and an un-limited ECU/CDI with a simple manual, the modified Honda CBR can produce twice the amount of horsepower compared to the stock Honda CBR-125.

Just when we want to leave the owner of the shop, points out that with more power ‘over 26 horses’ we also need to consider other modifications. And he shows us racing front forks and Brembo brake assemblies with disc brakes that are much larger then standard on the Honda CBR-125. Other stuff we get to see are rear swingarms, racing, air-filters, exhaust pipes, gas rear shocks, and the guy is not stopping ….we need an excuse to get away…