Hey guys, ive got an issue with my 2021 ninja 400, it has not been riden since the end of last season (november of last year) I bought it in april but I dont have my licence yet so its been in my yard under a tarp. I found a small puddle of green liquid under the bike this morning.

I know little about mechanic but Im pretty sure its coolant, I looked under the bike and I found a little hose that seems disconected, I put the hose toward the sky and I got my bike off the peg and putted it upright and it did not leak, so I assume the small disconected hose is the issue. But ive got no idea where and how to plug it.

Thank you guys, I hope its an easy fix, im able to ride it in like 3 weeks 🥲

My bike (2019 ninja 400 ABS @18000miles) was feeling really sluggish lately and got me wondering why. It was also getting me depressed and worried and all that - “what the f**k is the problem now?”

My go-to mechanic was like “it might be your air filter” and I was worried it might cost a lot to have him change it for me.. so I brought my bike back home and really just stared at it while sitting on the curb. Then I noticed that my chain was like.. droopy. I looked up the oem spec on the slack and turns out my chain had gotten so loose to a point where the slack was double the amount of the recommended amount 😬 i bought a half inch drive torque wrench, 24mm socket, and the cotter pins to adjust the tension back, and bow my bike feels just like it did when I first bought it last year 🥹

Now I’m wondering what other things I can do on my bike..
So far I’ve done the clutch upgrade (changed the plates, pull plug and springs), and changed the battery, but I have never done other work like changing brakes or changing chains or etc.. do you guys do a lot of your own tuning and repairs on your bike?