Help in finding what type of rockers are these on my GS150SE

[digarda_digarda]

Newbie to BCF all the way from Pakistan.
Need some help regarding adjustment of tappets on my Suzuki GS150se(Also known as Mola 150 in philipines)(SE stands for special edition and it is only a thing in Pakistan which means that the bike is of the variant with alloy wheels and front disc brake)
The problem is that there are some kind of springs that keep the rocker arms / tappets lifted from the camshaft end and pressed upon the valve which makes feeling the feeler guage quite confusing and annoying as they are always pushing onto the valve stems. when i try to lift them with finger it takes quite some force but the main thing is that even by lifting them using some steel wire or rope, i always end up with over tightened or loose adjustment of tappets.
When i asked a Pakistan Suzuki official about the said matter, he informed that these spring are used to eliminate tappet / rocker ticking sound.
If someone could help find the main purpose of these springs along with the proper way of adjusting them, i will be very thankful.
I am attaching a picture of rockers with spring of GS150SE for reference and easy understanding of my discussion.[/img]

[Easy-X]

Am I being a bit thick here? In relation to the valve side it looks like the arms are lifted up so if anything I would have thought they'd help! People have different approaches but I'd go with measuring the intake side while the exhaust side is open. Are you saying that if you slackened off the adjustment, i.e. creating a bigger gap between the top of the valve stem and the arm, that the spring is pushing the arm to close the gap 'cos it doesn't look like the spring is orientated that way from the photo
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[stinkwheel]

It'll be to reduce the risk of valve bounce and tappet noise, especially if servicing is neglected or if the engine is abused and over-revved. Quite a common thing to do with motorcycles in areas where people have a tendancy to ride their bikes until they stop working to make them more robust, the hero hondas even have roller cam followers.

You'd just need to adjust them incrementally until you get it right.
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[bikenut]

the springs "hook" over the arm and "stop' resting on the cam cover, the spring action will keep the adjusting screw in contact with the valve stem.

maybe the adjusting "measurement" are "degrees" of screwdriver slot from light screw to valve stem contact/cam pad to camshaft contact, ie zero clearance, then screwed out so many degrees ?

could you show the adjusting end of the adjusting screw to clarify ?

what does your book say about this topic ?

maybe a "special tool' needed to defeat spring action during adjustment procedure.

what is the " valve working clearance" quoted ?
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nuts about bikes

[Robby]

The proper way is to lift them as you have been doing. Something like this spring puller tool can be useful to get under the arm and lever it up: https://www.amazon.co.uk/CuisinSmart-Motorcycle-Exhaust-T-handle-Installation/dp/B0BXCTGCKZ/ref=sr_1_19?keywords=exhaust%2Bspring%2Bpuller&qid=1684399669&sr=8-19&th=1

Make sure to re-check the clearances after adjusting a rotating the engine. Screw and locknut adjustments can be tricky, the adjuster likes to move when you tighten up the lock nut. It is better for the clearance to be a little big than too small.

Do not remove the springs. They keep the rocker arms lifted off the camshaft, which allows the camshaft to receive better oiling.

[WD Forte]

If you lift the rocker you're also lifting the follower off the cam
so you'll have gap both ends
how would you measure clearance then?

I'd back off the adjuster until a gap appears which will mean the follower
is touching the cam, then put in the feeler and adjust it up until the correct gap is reached.
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[Robby]

[WD Forte]

Yes of course, I was looking at it upside down and backwards
and under the impression the pad was under the cam not over it

Not my fault, I is a scooty boi now
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bikers smell of wee