I had called in a head enginer in March and he was to come in first week of April but then this lockdown happened.
I put 15w50 oil as Bajaj oil is pure trash, it has alot of detergents to keep engine clean but it sucks at its main job which is lubricating. Bike used to heat up like anything in stop and go traffic, really hard gear shifts and couldn't put second gear from first if vehicle was hot. This motul is mineral so not a problem. But make sure that the grade is correct, you may use any brand of oil, but stick to the recommended grade and type.

Regarding the sound at 4th gear, it can't be that bad because its not getting in the way of the engine working just the sound is irritating. My dad says if you get engine opened for this then it won't be the same as an engine comes out of a factory. You will again face some engine problem in the future as these mechanics at ASC are incompetent.
Also the bike starts screaming past 5.5k rpm, in any gear. Is it the character of engine or is again something screwed up inside? Regarding that, unless a video is there on on how the sound sounds, I cant be of any help but as a thumbrule if there is no vibration or loss of power when the sound occurs, it would be the characteristic of the engine

My feedback

Perhaps you don't know 15w50 is FULLY compatible with engines that require 20w50.Perhaps I am not, but unless you would want to state your sentences in some otherway. Now as I had stated earlier what does the manual state for your vehicle? or if such something that FULLY compatible, then there is no need to trouble shoot eh? perhaps you would want to use your superior knowledge instead of this little old forum.

I'll try to put up a video on youtube and link here.

Let others handle this, I am done with people like you.

Hey guys, this is my first post here. I have been facing few issues on my 150 Neon for some time now. Have completed 2387km as of now and afr screw is at 2.75 turns ( still rough setting because unable to ride due to lockdown). Engine oil is Motul 3000 15w50.

1. The handle falls towards left with great force on it own. Like even on main stand if you lift the front wheel up by pressing down on the rear grab bar handle falls sharply to left. Because of this while riding at say around 40-50kmph bike "countersteers" towards right and even leans too. Ideally it should go straight. This is causing pain in my left palm and is unsafe too.
ASC people admitted that problem is there and overhauled and said the issue is fixed. 7 of them rode my bike solo, 3 times with me as pillion, 2 times as me riding with the service head as pillion. They claim issue is fixed but the bike is still falling towards right. Its little less with a pillion but it still there. One of the service head of KTM even went on to say that
" ABS wali bike hai aisa to hoga hi" ROFL. I told them to check T and coneset but they say its its fine and they didn't have the part either.

2. There are a couple of sounds coming from the engine. One is like chrrrrr direct from the engine, almost feels like the timing chain is making sound but I can't decide because never heard a timing chain before, my 2007 Suzuki Zeus still has no abnormal noise from the engine :3
This is most clearly heard at idle with a hot engine. I don't think this is a sound that will go away as run in period gets over.

Second sound is rather strange. While riding in the 4th gear, after 4000rpm engine makes this whirring sound like an old exhaust fan, (hmm hmm hmmm) and the "hmm" increases as I put in more throttle (hmm hmmmm hmmmmm). I can hear it upto 5.5k rpm after which the normal engine sound takes over. Again, ASC guys deny that its there.
Drive chain is properly adjusted and lubed with Motul c2 lube.

What to do guys please help.