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Old 03-06-2014, 02:03 PM   #1
1641bill   1641bill is offline
 
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valve adjustment question

Hi , just adjusted my valves and scoot now has power and idles.....I set them to .05 mm......I was looking at the use manual under periodic maintenance and it says valve clearance is .012...... is valve clearance and valve adjustment settings the same thing or are they referrring to some other adjustment ?



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Old 03-06-2014, 03:39 PM   #2
inuyasha   inuyasha is offline
 
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Hi
Theres no set answer when it comes to valve adjustment settings
I always go between .003 and .006
My last scoot ran fine at .003 int and .005 ex my present one the tao tao runs great at .004 int and .006 ex
So if the setting works for your particular scoot then all is fine
Take care and ride safely
Yours Hank
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Old 03-06-2014, 04:25 PM   #3
twowheeler   twowheeler is offline
 
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.003 on 50s and .005 on 150s
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Old 03-06-2014, 06:46 PM   #4
4getful2   4getful2 is offline
 
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.012" is a bit wide, even the liquid cooled engines don't normally go over .008".
Your motor might be a bit happier at what was given earlier.
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Old 03-10-2014, 02:41 PM   #5
blueboy5000   blueboy5000 is offline
 
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.003" to .005" (INCHES not MILIMETERS)
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Old 03-10-2014, 08:46 PM   #6
qwertydude   qwertydude is offline
 
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Quote:
Originally Posted by 1641bill View Post
Hi , just adjusted my valves and scoot now has power and idles.....I set them to .05 mm......I was looking at the use manual under periodic maintenance and it says valve clearance is .012...... is valve clearance and valve adjustment settings the same thing or are they referrring to some other adjustment ?
.012 mm is way too small. I'm pretty sure you mean .12 mm as that's pretty normal (equal to .0047 inches) for the exhaust valve as it heats up and expands more. Intake valve I'd keep tighter around .05 mm (equal to .002 inches) which is a little tight but ok, you'll just be adjusting them a little more often.

Really I'd go .006" exhaust and .005" intake. It's a little loose but better to have lightly ticking valves than have them go tight on you. Ticking valves are happy valves.
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Old 05-06-2014, 11:38 PM   #7
whitney1207   whitney1207 is offline
 
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i downloaded the scootdawg scooter manual for 50cc scooter and it says .05 mm or .002 inches
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Old 05-07-2014, 06:39 AM   #8
blueboy5000   blueboy5000 is offline
 
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Quote:
Originally Posted by whitney1207 View Post
i downloaded the scootdawg scooter manual for 50cc scooter and it says .05 mm or .002 inches
Nope, that's way too tight. Stick to .004 to .005"
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2011 Roketa MC-23-150

4T 150cc 157 qmj

24mm carb w 115 main jet and paper cone air filter

Manual petcock w Tygon fuel lines

Scrappy Dog Scooters Retro-slash stainless straight-thru exhaust

RED spring clutch

Adjustable CDI (brand unknown, it's blue and red and works great!)

KOSO high performance variator w 12g sliders

Gates Powerlink 835-20-30 belt

GPS verified 65mph on flats.
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Old 08-27-2014, 01:18 AM   #9
PHXKSTM   PHXKSTM is offline
 
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I just adjusted my valves at .005 and get a loud ticking thats ok? 150cc
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Old 08-27-2014, 04:15 PM   #10
kz1000st   kz1000st is offline
 
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On a 150cc it's best to set the intake at .004 inches and the exhaust at .005 inches. On a 50cc the stock setting is .002 inches but the hot setup is .003 inches.

If your valves sound loud at .005 inches it could be a slight mistake happened. I usually set the valves to clearance then rotate the engine until you're back at compression again and check them. I've found a slight difference from what I thought I set them at doing that. It's a good check.
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Old 08-28-2014, 12:42 AM   #11
PHXKSTM   PHXKSTM is offline
 
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Thank you good info
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Old 08-30-2014, 04:26 AM   #12
mmsscooters   mmsscooters is offline
 
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The valve adjustment can be tricky on 150s, after adjusting turn the motor over a few times and re-check, and only spin the motor clockwise
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