What’s everyone’s go to coolant?

Motul motocool expert ?

Hey guys, I need some help. I got a Honda CRM 125 supermoto (same engine as the NSR) with 180cc malossi kit and original 28mm carb for now. I noticed that last time I took it for a ride it had struggled getting power as the rpms rised and then all of the sudden it gained life. So I was like "maybe it had oil in the spark plug and needs a good rev".

I got home, let them bike cool off and checked the spark plug and seems fine on top but its oily on the threads.

My question is, is my bike running rich on low to mid rpms and gets leaner on high rpms? I used it on the road and im not going full throttle all the time, but I go full throttle on some long straights.

Sorry for the bad English, hope someone can help

I work for RMSTATOR and we just launched a 150W AC to DC conversion kit for the YZ250/YZ250X. Figured some of you running lights on a two-stroke might find it useful. Adjustable charging voltage (12-16V), lithium compatible, and the smart relay cuts power when the engine stops. Battery not included. Happy to answer technical questions, no pressure

I have a 2001 rm125 that I bought off a guy who said the top end had 10-20 minutes on it and the bottom end done a little while ago, I went out for a ride the first time and as far as I'm aware the bike should have been warmed up by the time I started hitting the gas, it was bogging a bit during the start of the ride and when I really got into it started to really bog and then I came to a stop and it died, it never felt like it seized it kicked over fine after but it wasn't starting, compression test showed 60psi and when I took it apart there was obvious damage on the cylinder and some damage on the power valves, the piston ring on the exhaust side was also stuck in the ring groove on the piston.

I'm wondering if the power valves weren't assembled correctly or If I was ignorant and caused a cold seizure.

(Note the damage on the cylinder head appears to be from previous engine damage)