What is the RC valve on the NSR250?
Setting up of the RC Valve is crucial to peak performance of the NSR250, and is covered later. After optimising the ports, and vigorously cleaning the barrel and RC Valve components, reassemble them.
Is the NSR250 similar to the Honda RS?
As mentioned earlier, the design of the engine lends itself considerably to the RS250, and this can clearly be seen in its port timing. The porting, both in shape and timing, although extremely similar to the RS, is Honda’s best compromise between performance and tractability/reliability.
What kind of motor does NSR 125 have?
I’ve got a NSR 125 RR its Fox Eye Model (2004 Year, imported to UK possibly from Switzerland). The servo motor does not turn. When I put the Key ON it just twitches but remains on Low. Rev up to 6500 and over it still remains on Low. (Where as my neighbour’s one (UK model 2002 ) turn fully when key ON.
How do you change clutch springs on NSR250?
Simply exchange the 2mm steel plate (part 10) closest to the engine with a 2.9mm plate (part 9) as used throughout the rest of the assembly. Using the thicker plate effectively preloads the clutch springs, raising their ‘rate’ in the same way adjusting preload does on suspension.
Setting up of the RC Valve is crucial to peak performance of the NSR250, and is covered later. After optimising the ports, and vigorously cleaning the barrel and RC Valve components, reassemble them.
What kind of engine does the NSR use?
The overall layout is based very heavily on the second generation (i.e. crankcase inducted) RS250 HRC race engine, in fact the RS250 motor will bolt straight into the NSR’s frame using all the standard mounting points except the top rear. Also, a number of RS parts are interchangeable with the NSR’s, but this will be covered at a later date. Ports.
As mentioned earlier, the design of the engine lends itself considerably to the RS250, and this can clearly be seen in its port timing. The porting, both in shape and timing, although extremely similar to the RS, is Honda’s best compromise between performance and tractability/reliability.
Simply exchange the 2mm steel plate (part 10) closest to the engine with a 2.9mm plate (part 9) as used throughout the rest of the assembly. Using the thicker plate effectively preloads the clutch springs, raising their ‘rate’ in the same way adjusting preload does on suspension.