[MyNSR] [PictureGallery] [Tuning] [Derestriction] [Visitor Bike's] [2T'engines] [Specifications[Advice] [Links] [ContactMe] [Message Forum] [VFR400]

Below is so general info on tuning 2T engines that I picked up when browsing the web. Changing the ignition system is very expensive. If you do happen do own the '99 model you should know that after the exhaust sytem, this is where the NSR is most restricted. Eletronic units which need to be replaced are the CDI unit and the RC-unit (exhaust level adjuster), when fitting a more powerful cylinder, replacing these two is very important (as the new cyclinder would overheat).

Changing the whole exhaust system and the silencer is the easiest (and most simple) way of increasing the power output of this bike. However, the bike may be worth less derestricted. Even if you do own a unrestricted bike this will always add a few extra bhp's and save weight. Depends of course on what make it is, if the bike's restricted it should develop around 22 hp at the rear wheel. Arrow offers most power closely followed by Gianelli at a 20% lower price. Top speed is said to be around 100mph.

The cylinder of the NSR125 is restricted and so it ought to replaced with the Italian full power one which incidently happens to be very cheap. Malossi and Pollini all make bigger cylinders for the NSR. In order to prevent overheating the new cylinder, the exhaust level adjuster ought to be replaced with the unrestricted type Polini produce a 160cc kit that improves take off power and apparently redlines @ 11900rpm! If this is combined with a performance exhaust, it is possible to get in excess of 30bhp.

Engine work requires a combination of in-depth knowledge of the function of a two-stroke, internal-combustion engine and the proper tools and training to make such desired modifications without disturbing the balance and harmony of the process. It's both a science and an art.

The 2-stroke engine needs intake ports for getting the fuel/air mixture in, and it needs exhaust ports to get the spent mixture out. It also needs a way to move the fuel/air mixture from the crankcase to the combustion chamber. This is performed through exchange ports, so-called because fuel is exchanged from the crankcase to the combustion chamber through these ports.

More info. will be added at a later date.

PRESS THE 'h' KEY FOR THE HOMEPAGE