Starting probs 150cc Puma Amstar

[heartthrobhealey]

Hey guys,

Been frequenting the forum for over a year now, I always find the best scoot advice here. Never registered til today, though, because I always found solutions on past threads and I'm not an expert so I never have input to add

Now I've got troubles with my 150cc Puma Amstar scoot not starting and I feel like I've run out of things to check from the forums.

Here's what's going on:
- Electric start cranks fine, but never seems to fire
- It's been doing this for a while when I started it cold, but after some coaxing it always started (I'd usually have it die on my first couple stops though, once warm the thing ran and started fine).
- Now it won't start. Just cranks and tries to fire but never does.

Here's what I've checked:
- It has spark and a new spark plug
- New carb from previous repair
- Checked compression, it's fine
- Checked fuel supply and vacuum lines, fuel is getting to the carb fine
- Gas tank clean, good gas
- Just did an oil change last week (no change in starter issues)
- Battery's fully charged
- Idle screw's adjusted
- Petcock is working fine, good fuel flow
- Clean fuel filter

So... I'm wondering what I still need to check. It cranks and tries to fire, but in the end nothing. I don't want to keep doing this and wearing down the starter

[derbi]

Try checking the valve clearance

[heartthrobhealey]

When I do the adjustment what should the clearance be? .05?

I've never done a valve adjustment and I've put 2700 miles on this puppy. Is it something a noob scooter mechanic like myself can do without messing up something?

[derbi]

Any wheres between .003 and .005. and it is time consuming but not too difficult.

[heartthrobhealey]

Thanks Derbi, I'll give it a shot.

[heartthrobhealey]

That was it! Fired up like a champ. I went .04 mm on the adjustments. Took me all afternoon after I saw The Dark Knight Rises this morning, but it's done.

Thx Derbi

[derbi]

Jul 20, 2012 20:07:07 GMT -5 heartthrobhealey said:

That was it! Fired up like a champ. I went .04 mm on the adjustments. Took me all afternoon after I saw The Dark Knight Rises this morning, but it's done.

Thx Derbi

Your welcome

[cbentz83]

Is there a guide somewhere for doing a valve adjustment? This sounds exactly like my problem!

[gatekeeper]

www.youtube.com/watch?v=s0K-ytyjOFg