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Author Topic: cannot start pw80  (Read 3754 times)

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Offline krez

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cannot start pw80
« on: August 15, 2012, 02:21:55 PM »
looking for some advice, I have a 2000 pw80.  I installed a new wisco piston .010 over, new gaskets, a new reed valve.  The bike still won't start, when I kick the bike over gas actually spits out the front of the carb.  Any suggestions would be apppreciated.  Compression is only 55lbs
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline xandyx

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cannot start pw80
« Reply #1 on: August 15, 2012, 02:29:26 PM »
is there a spark?

maybe it's overfueling, split the carb and check if everything looks fine.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline cnrcpla

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cannot start pw80
« Reply #2 on: August 15, 2012, 03:19:47 PM »
Do a spark check, if it is sparking a nice bright blue then move on to the carb.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline Logan Dewey

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cannot start pw80
« Reply #3 on: August 15, 2012, 04:06:57 PM »
I would say replace some of the possible issues cheapest to most expensive, starting with a spark plug, then eventually if you try alot and it still doesnt start, I'd say get valves checked. if those things have em. :)
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline cnrcpla

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cannot start pw80
« Reply #4 on: August 15, 2012, 05:25:54 PM »
A pw80 is a two stroke. It has no valves. Two strokes use ports. Google an engine animation of a two stroke to get a basic understanding of what happens within a two stroke engine. The only valve two strokes have are the power valves and I don't think this bike has one. Not to meantion I don't think many members on this forum will be trouble shooting with valves   ;D one of the many reasons why I ride two strokes, valves can be a pain in the arse.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline Stusmoke

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cannot start pw80
« Reply #5 on: August 16, 2012, 01:07:10 PM »
Quote from: cnrcpla on August 16, 2012, 12:25:54 AM
A pw80 is a two stroke. It has no valves. Two strokes use ports. Google an engine animation of a two stroke to get a basic understanding of what happens within a two stroke engine. The only valve two strokes have are the power valves and I don't think this bike has one. Not to meantion I don't think many members on this forum will be trouble shooting with valves   ;D one of the many reasons why I ride two strokes, valves can be a pain in the arse.

Totally false: Valves ARE a pain in the ass, not just can be a pain in the ass :P
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline riffraff

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cannot start pw80
« Reply #6 on: August 17, 2012, 07:09:55 AM »
" The only valve two strokes have are the power valves"

Don't forget the reed valve   ;D
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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aaahhhhh yes, I remember the good old days

Offline cnrcpla

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cannot start pw80
« Reply #7 on: August 17, 2012, 05:39:55 PM »
Well yeah those too but they are a little different  :P
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline SachsGS

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cannot start pw80
« Reply #8 on: August 18, 2012, 04:46:49 PM »
Typically you need at least 100PSI for an engine to run. I've had Yamahas run at 80PSI but at 55 she won't start.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline metal_miracle

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cannot start pw80
« Reply #9 on: August 18, 2012, 09:27:35 PM »
1.  If your bike have reed valve i would check those.

2..  And if your petrol is old, you can kick til your blue in your face

3...  Also try removing your exhaust it it my be blocked
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Offline eprovenzano

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cannot start pw80
« Reply #10 on: August 20, 2012, 02:34:48 PM »
Just a thought, could the piston be in backwards?
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
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Eric Provenzano
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