I Need Help Here; Decompression Assembly

[Hizanee]

Hello guys, I need help here. CURRENTLY Im not understand how decompression work.

currently, im using custom racing cam without pin slot, and I planning to remove decompression assembly. If I remove decompression assembly, it will give me sound?
how if I drill my cam for pin slot(without decompression assembly) it will give me easy to start?
What actually I want is; I want to have easy start and no sound (tik tik) when remove Decompression Assembly . It is got the way?

TIA

 

[Hizanee]

@traxxas-modifier & anoyone?

 

[traxxas-modifier]

if you remove the decomp assy in the camsprocket, thats ok.
BUT you must use your kickstarter to start your bike (unless special consideration is made to the bore & head to have a correct compression ratio)
same as what @rowan did to their fast bike.

 

[Hizanee]

@traxxas-modifier thanks.
but im not understand how decompression, so what im thinking now is, when I remove decomp assy it will give me a sound?(got way to stop/reduce the sound?
and one more is, if I remove decomp assy, that mean only good with cam without pin slot? pin slot cam good with decomp assy?

 

[traxxas-modifier]

@traxxas-modifier thanks.
but im not understand how decompression, so what im thinking now is, when I remove decomp assy it will give me a sound?(got way to stop/reduce the sound?
and one more is, if I remove decomp assy, that mean only good with cam without pin slot? pin slot cam good with decomp assy?

decompression release purpose is to release the compressed air inside the cylinder when piston is on compressed state (top) during the startup.
thats why its easy to start your bike.
if the engine rpm is less than (estimated) 1,000rpm which is the rpm of pushing estarter button,
it opens the exhaust valve slightly to release some compressed air inside the block.
thereby its easy to start.

if you remove that decomp pin in the camshaft, the valves will not open slightly during startup thus hard to start.


removing the decomp pin in the camshaft needs also to remove the decomp assy in the cam sprocket
else there will be a sound due to the decomp assy lever will go back and forth when turning.

 

[Hizanee]

@traxxas-modifier thank a lot,
That mean, if camshaft without pin slot, that mean decomp assy is no need anymore.
And if, camshaft with pin slot, that mean decomp assy is need.
Correct?
and there is no way to stop the sound?

 

[turbulence]

@traxxas-modifier thank a lot,
That mean, if camshaft without pin slot, that mean decomp assy is no need anymore.
And if, camshaft with pin slot, that mean decomp assy is need.
Correct?
and there is no way to stop the sound?

If you want more power, best to remove decompin in any kind of camshaft to achieve higher rpm.
the sound has nothing to do with your decompin hanging, thats the reaction of your racing camshaft. there is no way to stop the sound if you use racing cam with or without decompin

 

[Hizanee]

if I drill my racing cam for pin slot and use decomp assy, it good? im big engine, 65mm, and polyquad head

 

[traxxas-modifier]

if I drill my racing cam for pin slot and use decomp assy, it good? im big engine, 65mm, and polyquad head

if you really want yes you can drill the cam. but there are risk on doing that.
if its not properly drilled, theres a high chance that decomp pin will break.

but yes you can do that drill mods

 

[turbulence]

if I drill my racing cam for pin slot and use decomp assy, it good? im big engine, 65mm, and polyquad head

decompin assy will only slow down your mc. You MUST remove it to really see performance of what you have put into your MC

 

[Stockbore]

Amen!

 

[sprinter777]

decompin assy will only slow down your mc. You MUST remove it to really see performance of what you have put into your MC

with due respect sir and for the knowledge of everybody, will you kindly elaborate how our decompin will slow down our bike?

 

[Hizanee]

@traxxas-modifier, if i big engine, If use racing cam with pin slot and decomp assy, no problem right?
the decomp assy made for support ram with pin slot right?

 

[milu]

decompin assy will only slow down your mc. You MUST remove it to really see performance of what you have put into your MC

Including the balancer too sir removed?

 

[Stockbore]

Including the balancer too sir removed?

nope. that's a very important piece of your engine sir to be able to start

 

[AJM]

@traxxas-modifier is that weird sound coming from the cams or the decompression pin removed? TIKTIK sound? IS it ok?

 

[Stockbore]

@traxxas-modifier is that weird sound coming from the cams or the decompression pin removed? TIKTIK sound? IS it ok?

cams bro.

 

[AJM]

@Stockbore is it ok? or i need to tune it up again. because the sniper of my friend doesnt have that tiktik sound.

 

[Stockbore]

@Stockbore is it ok? or i need to tune it up again. because the sniper of my friend doesnt have that tiktik sound.

tiktik sound is normal on racing cam sir..what brand of cams sir? do you use the same specs of cam with your friend?

 

[AJM]

@Stockbore i am using faito s4evo sir with decompression pin removed