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New to the gs bike. Its was running when i first got my hands on it. Been having some trouble with the bike getting up past 45 mph. I know this bike has a lot more power. But i cant figure out what the problem is. I just went through and got the timing down and i pulled the carbs off to check them. After i put them back on and went to start the bike back up, but as soon as i did, its sitting at about 4000 RPM and wotn droo down no matter what i do. I messed with the idle screw and the fuel mixture but it dosemt affect it one bit. Anyone who has any suggestion please help!!!
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The carbs are in need of a full tear down and rebuild. Here is the rebuild link..
Oring kit here..1 kit is all youll need. And replace the ingtake manifolds orin gs whilke the carbs are off. see page 3 of the oring website for information....
If you just want to farm them out I do rebuilds and you can PM me for my phone number or other information.MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it. -
If the intakes rubber is pretty stiff replace those as well and get all new clamps.MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.Comment
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Also, do the valve adjustments while everything else is down for maintenance.
Service manual........scroll down to the 450 manual here.
Last edited by chuck hahn; 05-02-2017, 08:45 PM.MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.Comment
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Probably sketchy carbs as Chuck mentioned, could also be cracked carb boots causing an air leak.
Maybe even improperly routed throttle cables.2@ \'78 GS1000Comment
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Just quickly I'd say you probably haven't got your throttle cable connected correctly.
You should do all the other stuff that Chuck has mentioned though.Current:
Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)
Past:
VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
And a bunch of other crap Yamahas....Comment
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Pick your bike from the list and you can search all the sub fiches. Things with a price listed are still available. If you can wait for the 2 weeks from ordering then go with Parts outlaw. Or you can copy and paste part numbers on Ebay and do some comparison shopping.
MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.Comment
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