dtr 125 52 plate looking for answers
Discussion
Hi,
There maybe a collar in the exhaust where it comes out of the cylinder. To remove this you need to grind away 3 spot welds. I added an aftermarket tail pipe to mine and tweeked the power valve to give me more mid range torque, i also changed the front sprocket to give me more top end speed. Mine was older than yours by a few years though, phone yamaha uk and ask them.
There maybe a collar in the exhaust where it comes out of the cylinder. To remove this you need to grind away 3 spot welds. I added an aftermarket tail pipe to mine and tweeked the power valve to give me more mid range torque, i also changed the front sprocket to give me more top end speed. Mine was older than yours by a few years though, phone yamaha uk and ask them.
If I remember correctly, your model year has 3 different restrictors...
Inlet manifold, exhaust and the speedo I think restricts the revs when you hit approx 60mph.
Ok, found what I was looking for....
[b]Removing Speedo Restriction
The speed is restricted by means of a reed switch which is mounted in the rear of the speedo. It tells the CDI when the bike reaches 60mph and stops the revs from increasing.
To remove the speedo restriction take off the headlamp cowl and pull out the spring clips holding the speedo in. Then unscrew the speedo cable and lift up the clock. You will see two things in the bottom of the clock casing. One is round and is the light bulb for the clock, the other is white and oblong. This is the reed switch and you carefully prise it out and tuck it to one side out of the clock. I suggest you put it in a bag and tuck it as far away as possible. Do not cut or disconnect it.[/b]
Inlet manifold, exhaust and the speedo I think restricts the revs when you hit approx 60mph.
Ok, found what I was looking for....
[b]Removing Speedo Restriction
The speed is restricted by means of a reed switch which is mounted in the rear of the speedo. It tells the CDI when the bike reaches 60mph and stops the revs from increasing.
To remove the speedo restriction take off the headlamp cowl and pull out the spring clips holding the speedo in. Then unscrew the speedo cable and lift up the clock. You will see two things in the bottom of the clock casing. One is round and is the light bulb for the clock, the other is white and oblong. This is the reed switch and you carefully prise it out and tuck it to one side out of the clock. I suggest you put it in a bag and tuck it as far away as possible. Do not cut or disconnect it.[/b]
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