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From: p50&ke100 on 20 Oct 2007 18:23
Traded a bunk bed for a Yamaha Pw50 I am unsure how to read the year
from the serial #

I have cleaned the carbs and the float seems to work well it was
seriously varnished.

has Plenty of spark and compression
The choke makes no difference in starting
if i put finger over carb intake it starts and idles 1st kick. plug
is new.
When switched to run the bike howls at full speed and dies in les than
30 seconds.leading me to believe it isnt getting fuel..
plug is dry after starving
ideas & sugeestions please.
\
My son would like to join me riding next weekend...
I have tried all i know.
Thanks in advance!
Brent
Toronto ON

From: Miko the pooch on 20 Oct 2007 20:48
In article <1192919000.365093.36030(a)y27g2000pre.googlegroups.com>,
p50&ke100 <brent(a)pottsfamily.ca> writes:
> When switched to run the bike howls at full speed and dies in les than
> 30 seconds.leading me to believe it isnt getting fuel..
> plug is dry after starving

Tank vent is plugged causing a vacum that prevents the fuel from flowing?
That would be easy to test by just unplugging the the tube to the carb
and turning the gas on...

From: CrashTestDummy on 20 Oct 2007 23:47
On 21 Oct 2007 00:48:12 GMT, miko(a)sammy.local (Miko the pooch) wrote:

>In article <1192919000.365093.36030(a)y27g2000pre.googlegroups.com>,
> p50&ke100 <brent(a)pottsfamily.ca> writes:
>> When switched to run the bike howls at full speed and dies in les than
>> 30 seconds.leading me to believe it isnt getting fuel..
>> plug is dry after starving
>
>Tank vent is plugged causing a vacum that prevents the fuel from flowing?
>That would be easy to test by just unplugging the the tube to the carb
>and turning the gas on...

Yeah, that's the first step if you haven't already tried it.

If that's okay, make sure you put the slide back in the right way.
It almost sounds like it was reinstalled 180-degrees off ("howls at
full speed...").

My son's old GT-80 wouldn't run very weel at all with air filter
foam that was too dense... make sure the thing can breath.

Assuming the float is working properly, and that the level is set
reasonably, I'd next check for air leaks. Make sure you have a good
carb-to-boot seal, and check the tightness of head and intake nuts.

Of course this all assumes that you got the carb thoroughly cleaned
up, with all orifices flowing freely. You might wanna turn the air
screw all the way in, then back it out one and a half full revolutions
(I think that's what the standard was, somebody correct me if I'm
wrong) to get in the ballpark.

If you have good spark, compression, flowing gas, and air, then
it's just something small and quirky. Incorrect carb adjustment...
backwards slide... clogged carb orifice... worn (or sticking) needle
and seat... stuck float... backwards slide... etc. Good luck!


Fred Bradford - CrashTestDummy
fjbradfordREMOVE(a)tx.rr.com
From: FiftyPlus on 21 Oct 2007 09:16
>Of course this all assumes that you got the carb thoroughly cleaned
>up, with all orifices flowing freely.

Sometimes when carbs a really varnished up it takes more cleanings to
get them really clean. I'd try a couple of cycles of soaking the
whole carb in a bucket of carb cleaning goop followed by blowing out
all the orifices with compressed air. Read the label on the cleaner
goop they usually destroy nylon & rubber.

From: Hustlin' Hank on 21 Oct 2007 17:14
On Oct 20, 5:23?pm, p50&ke100 <br...(a)pottsfamily.ca> wrote:
> Traded a bunk bed for a Yamaha Pw50 I am unsure how to read the year
> from the serial #
>
> I have cleaned the carbs and the float seems to work well it was
> seriously varnished.
>
> has Plenty of spark and compression
> The choke makes no difference in starting
> if i put finger over carb intake it starts and idles 1st kick. plug
> is new.
> When switched to run the bike howls at full speed and dies in les than
> 30 seconds.leading me to believe it isnt getting fuel..
> plug is dry after starving
> ideas & sugeestions please.
> \
> My son would like to join me riding next weekend...
> I have tried all i know.
> Thanks in advance!
> Brent
> Toronto ON

If I remember correctly, the "start" position is only a different
ignition timing than the "run" position. If you are sure you have all
the jets clean and can see light thru the pilot jet, it may be a
timing issue. Or, a timing issue along with a dirty pilot/main jet.

Hank <~~~suffers from C.R.A.F.T. (Can't Remember A F***ing Thing).

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