@LaNoire pretty sure the swingarm is from a 1991. The 89’s I don’t think carry the same 3SP stamp on them but still use the same hardware. Although I think the chain slider is a slightly different design as the 89 has square edges
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
Green and black wire that feeds into rhe clocks. Cut it and earth it to the negative terminal of the battery. Full power then. For a X that is. Give it a pipe, upjet and free flowing filter and you will have nicr gains!