【KITACO】LIGHT Valve Spring Set Review

KITACO

24 Feb 2016

LIGHT Valve Spring Set

Fits: HONDA little cub, HONDA CL50, HONDA Super Cub 50, HONDA Super Cub 50, HONDA Super Cub 50, HONDA Super Cub 50, HONDA CRF50F, HONDA CRF50F, HONDA jazz, HONDA MONKEY BAJA, HONDA MONKEY, HONDA BENLY50CD50, HONDA BENLY50S, HONDA CUB press 50, HONDA CUB press 50, HONDA CUB press 50, HONDA DAX, HONDA solo, HONDA CHALY 50, HONDA GORILLA,

Japan User(translated)

3/5

For High Camshaft

STREETCam at CUB (? Limiter cut cam) In introducing,
Because Normal spring was too soft, cheap KITACO
We introduced LightSpring.
Originally DoubleSpring is ideal, but 50 Normal head corresponded
Because I do not have a Spring pedestal, I have to do my best with Single.

Apart from that Spring is not very hard, Eco No Power
With the impression that 1 to 20 percent more than Normal spring of Engine, STREET
I think that it is exactly for Cam.
A place where it is not Solidly blindly is a good impression.

Incidentally "I will incorporate it for the time being" You had better stop for. SmallEngine Displacement Volume
Budapest Valve Spring is eaten equivalent Power, Locker Arm's
Slippers face wear surely faster.
Because it is the Parts because it is High Camshaft and Bore up, you must be careful
I am going to improve it may be worsening ^ ^;

Responses

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KITACO

10 Mar 2024

LIGHT Valve Spring Set

Japanese Webike user

5/5

If you want to Bore up with Normal head, by all means.

Bore up + High Camshaft seemed to be perfect, but... ?Tappet sound is annoying.
?The RPMs are not as high as expected.
Why? I found out that the Spring of Valve is not good if it is set to "NORMAL", so I will replace it with &arrarrr;Reinforcement Type.

What is the role of Valve Spring?
Valve springs keep intake and exhaust valves constantly pressed against the valve seat of the cylinder head to prevent leakage from the combustion chamber.
The Valve is pushed down by the Cam, but when it returns, it does so with the force of the Valve Spring. The Valve must follow the movement of the Cam in order to produce a stable output.
The valve opens and closes once per cam revolution, making one round trip up to the largest lift. When the Valve Spring can no longer withstand the load (in reality, there are also problems with frequency), Surge-ing occurs and the Engine stops turning. In the worst case, the Valve or Engine will be damaged.
Surge ing When Valve does not follow Cam when the rotation of Engine is increased and Valve vibrates with unintended Timing.

Why do bore up cars need Reinforcement Springs?
If Valve Spring is NORMAL, Surge-ing is likely to occur at high rpm when using high rpm with High Camshaft. By the way, if you strengthen only the Valve Spring on the Normal cam, it only becomes resistance, but there is no Merit.

[Strengthening Valve Spring].
Literally, the Valve Sub Ring hardens itself. (Increases load-bearing capacity.)
Simply put, the Valve Spring Rate is increased to withstand higher loads at higher RPM.

[Effect]
When the Valve Spring is strengthened, the Cam pushes down the Spring, so the Engine Friction is increased. This will suppress the valve jump that tends to occur at high RPM range.

good point
◎No snagging up to high rpm and runs cleanly and without loss.
◎Tappet sound became slightly quieter.
◎They can maintain high rpm even on hilly roads.
◎for STD Head.

A bad point
▲Recommendation will not be made for Single Item replacement. Please do it by Overhaul around Head because it involves removal &arrarr;Valve removal/attachment, etc. of Sealinder Head.
The tool called "Valve compressor" needs to be prepared.

When the engine is running at high RPM, the Valve Spring cannot expand and contract in time with the Valve movement, causing ValveSurge-ing. 。 Reinforcement springs have stiffer springs, so they can be eased to some extent.
It is quite time-consuming to replace, but it is effective.
Whether you are going to do it yourself or ask the Shop to do it for you, we will recommendation! View detail