4 stroke problem
Moderator: Moderator
4 stroke problem
ok i got this 4 stroke scooter given to me, sat in a barn since 2004(came from pep boys they say). they had it 6 months and the starter quit and they said it didnt run anyway i got it to start and run ok. it will idle but not right. up then down then up and way down. i cleand the carb real good(3 times) all the air leaks i believe to be fixed. i can ride it up n down the road a couple times then it just peters out. i got the thing to run 36 mph (speedo said so). so what do you guys think is going on here? oh and where is a good place to get performance parts once this thing is running right.
1986 honda spree(silver fox)
BBK
85 head
SB50 intake
SB50 reeds
taz gears
2.75X10 tires
2000 honda elite S
prodigy vari
2k grabber clutch springs
9:1 gears
jdm tail lite
1982 suzuki FA50
BBK
85 head
SB50 intake
SB50 reeds
taz gears
2.75X10 tires
2000 honda elite S
prodigy vari
2k grabber clutch springs
9:1 gears
jdm tail lite
1982 suzuki FA50
- johnkiniston
- BMX
- Posts: 24
- Joined: Wed Dec 02, 2009 11:37 pm
- Location: Tucson, AZ
Re: 4 stroke problem
What's your compression when its cold vs when it quits?
Re: 4 stroke problem
Valve adjustment.
Bear 45/70
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
Re: 4 stroke problem
What the guy in the youtube link wants to say is...."they are junk throw away scooters, but we will sell you performance parts!".odinxxix wrote:(came from pep boys they say). oh and where is a good place to get performance parts once this thing is running right.
http://www.youtube.com/watch?v=9e6EMQ_z36Y
2001 Honda Elite
1995 Yamaha Jog
1994 Yamaha Axis
I can't believe
that cop put me
in the backseat
when I clearly
called shotgun.
1995 Yamaha Jog
1994 Yamaha Axis
I can't believe
that cop put me
in the backseat
when I clearly
called shotgun.
Re: 4 stroke problem
i know they arent the greatest but it was free so maybe i could make use of it. just need info.
1986 honda spree(silver fox)
BBK
85 head
SB50 intake
SB50 reeds
taz gears
2.75X10 tires
2000 honda elite S
prodigy vari
2k grabber clutch springs
9:1 gears
jdm tail lite
1982 suzuki FA50
BBK
85 head
SB50 intake
SB50 reeds
taz gears
2.75X10 tires
2000 honda elite S
prodigy vari
2k grabber clutch springs
9:1 gears
jdm tail lite
1982 suzuki FA50
Re: 4 stroke problem
I gave you info...and my 2 cents . You asked about performance parts and at the end of that video is a link. http://www.MRP-Speed.comodinxxix wrote:just need info.
2001 Honda Elite
1995 Yamaha Jog
1994 Yamaha Axis
I can't believe
that cop put me
in the backseat
when I clearly
called shotgun.
1995 Yamaha Jog
1994 Yamaha Axis
I can't believe
that cop put me
in the backseat
when I clearly
called shotgun.
Re: 4 stroke problem
well got it running, but i have to cover 3/4 of the air inlet tube to get it to run right. i havent found an air leak but it runs. it will do 35 mph on a flat and 42 down a small hill. turn signals dont work but ill figure it out. maybe if it pans out ill get a few performance parts for it.
1986 honda spree(silver fox)
BBK
85 head
SB50 intake
SB50 reeds
taz gears
2.75X10 tires
2000 honda elite S
prodigy vari
2k grabber clutch springs
9:1 gears
jdm tail lite
1982 suzuki FA50
BBK
85 head
SB50 intake
SB50 reeds
taz gears
2.75X10 tires
2000 honda elite S
prodigy vari
2k grabber clutch springs
9:1 gears
jdm tail lite
1982 suzuki FA50
- killerpancake
- Spree
- Posts: 240
- Joined: Thu Dec 30, 2010 11:33 pm
- Location: Grand Rapids, MI
Re: 4 stroke problem
free is free, doesn't really matter if it's a cheapy right?
If it don't fit, force it. If it breaks, it needed to be replaced anyway.
(Previous)
87 honda spree
85 honda spree
(Current)
88 yammy razz
(parts bike)
another 88 yammy razz
(Previous)
87 honda spree
85 honda spree
(Current)
88 yammy razz
(parts bike)
another 88 yammy razz
Re: 4 stroke problem
Sounds like you have a dirty pilot jet, and or a bad petcock.
my guess is the jet, pull the bowl off and take the jet out and look thru it,'
Also check the float , sometimes the on/off shut off pin gets stuck and wont let gas into the bowl.
my guess is the jet, pull the bowl off and take the jet out and look thru it,'
Also check the float , sometimes the on/off shut off pin gets stuck and wont let gas into the bowl.
- Wheelman-111
- Moderator
- Posts: 11321
- Joined: Wed Oct 22, 2008 5:09 pm
- Location: Deepinnaharta, Texas
Re: 4 stroke problem
Greetings:
If it's a CV-type carb, have a very close look at the diaphragm that vacuum-controls the slide. These are very easy to rupture - even the higher-quality Keihin items. No tellin' how easy it is to muck up a Chinese replica.
The sealing bead has to fit perfectly into the groove when you assemble. That's really easy to get wrong, too. If its bead gets crushed at any time during assembly - even at the Factory - and then re-assembled, the seal will be funky and the slide won't rise properly in response to throttle.
If you find an intact diaphragm without any creases, try to reassemble. If the diaphragm won't cooperate, let it air out for a few hours and then maybe try refrigerating it just prior to assembly.
If it's a CV-type carb, have a very close look at the diaphragm that vacuum-controls the slide. These are very easy to rupture - even the higher-quality Keihin items. No tellin' how easy it is to muck up a Chinese replica.
The sealing bead has to fit perfectly into the groove when you assemble. That's really easy to get wrong, too. If its bead gets crushed at any time during assembly - even at the Factory - and then re-assembled, the seal will be funky and the slide won't rise properly in response to throttle.
If you find an intact diaphragm without any creases, try to reassemble. If the diaphragm won't cooperate, let it air out for a few hours and then maybe try refrigerating it just prior to assembly.
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
Re: 4 stroke problem
no worries guys, i traded it for a 98 honda elite 50 that barley ran. got it home and cleaned the carb and it runs great.
1986 honda spree(silver fox)
BBK
85 head
SB50 intake
SB50 reeds
taz gears
2.75X10 tires
2000 honda elite S
prodigy vari
2k grabber clutch springs
9:1 gears
jdm tail lite
1982 suzuki FA50
BBK
85 head
SB50 intake
SB50 reeds
taz gears
2.75X10 tires
2000 honda elite S
prodigy vari
2k grabber clutch springs
9:1 gears
jdm tail lite
1982 suzuki FA50
- spree-rider
- Elite
- Posts: 693
- Joined: Tue Nov 03, 2009 8:24 pm
- Location: Burien, WA
Re: 4 stroke problem
sa 50?
86 spree
sb 50 intake and reeds
3.00x10 rear tire
waxed
99Polaris indy 700
harliquim paint
2" bar riser
lefty throttle
ice scratchers
SLP tri keel skis
ported
high compression head
chrome low windshield
mountain bar
Xtra-10
I ALWAYS KEEP ONE ROLLED
sb 50 intake and reeds
3.00x10 rear tire
waxed
99Polaris indy 700
harliquim paint
2" bar riser
lefty throttle
ice scratchers
SLP tri keel skis
ported
high compression head
chrome low windshield
mountain bar
Xtra-10
I ALWAYS KEEP ONE ROLLED