Honestly it's total codswallop that they are restrictions. They're supposed to add power. To be honest you won't notice any difference removing them. I've tried it it plenty of times. Both my DTS are 200cc now.
I know It feels Like a quick easy "tune" to make you feel like you've added power.
But invest in porting, bigger carb, better exhaust. Even cut the lid off your airbox and jet accordingly helps, and adds a nice noise 😉
Fit the 3MB head if you haven't already. Still didn't make much difference when I had a 125r engine.
Take it even further and get a zeeltronic CDI
Don't forget the Reedswitch!
You might be lucky and have the CDI without the low rev limiter like i did, I think its a 3rm-20
Which is plug in and play on late dt125r
