valve clearance

[redgokart]

agk.com suggests 2 and 3 thousandths on the valve clearance with 18 lb valve springs. why not use 15 and 20?

edit: link

 

[Strigoi]

why would you want it that loose?

 

[EagleTalons]

agk.com suggests 2 and 3 thousandths on the valve clearance with 18 lb valve springs. why not use 15 and 20?

edit: link

When you set it that loose you lose lift.

 

[redgokart]

im just pulling these numbers from the manual. i just thought that 2 and 3 would be too tight. if your gonna go that close why have valve lash to begin with?

edit: im just guessing because the stock springs are like half the tension as these 18 pounders.

 

[EagleTalons]

im just pulling these numbers from the manual. i just thought that 2 and 3 would be too tight. if your gonna go that close why have valve lash to begin with?

edit: im just guessing because the stock springs are almost have the tension as these 18 pounders.

You need a small amount of lash for when the engine heats up and the parts expand. As not to burn a valve.

 

[redgokart]

another thing is these stock retainers. the exhaust had a lash cap and the intake didnt. do i even need this exhaust lash cap?

 

[tlizard2]

If you buy the 18 lbs rev kit from NR racing it will come with the springs and a new retainer and lash cap for the intake valve. The lash cap prevents the tip of the valve from mushrooming.

 

[minidragbike]

Also the lash allows you to start the motor up easy. So serious on the edge racers run 0 on both sides trying to get everything they can get. Normaly if you set the lash cold it will open up 0.001"-0.003".

I personally run 0.004" intake and 0.006" exhaust.

 

[redgokart]

i will need new feeler guages for this job.