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warm up issue (guessing carbs?)

  • Thread starter Thread starter chris lawson
  • Start date Start date
C

chris lawson

Guest
1983 Gs450GAD
Bike runs good but doesn"t seem to warm up until you run it at 45 and up for a bit. (gets hot but still seems to bog till you run it on the back roads or highway)
Anyone have an idea what this could be? Bike runs great other than that. I know they tend to be cold blooded but idling it in the driveway even in summer heat still bogs even if i run it for a bit

thanks
 
Have the carbs been properly cleaned and synced, valves adjusted, plugs replaced, etc? Are you using the choke to warm it up?
 
As cowboyup is hinting, there are some basic issues that must be addressed to make sure your bike is set up correctly.

When all those items are set correctly, you should be able to start the bike and ride off within 30 seconds.
By the time you are in second gear, you can turn off the "choke" and keep riding.

.
 
Make sure you have the correct plug. Too cold of a plug can cause this, runs fine after the cylinder/head are hot. I fought this in a race car for a couple months then my engine guru told me to put 1 step hotter plug in; problem solved.
Plus the maintenance items previously mentioned. It all has to work together.
 
carbs spotless and all lines and hoses newer. floats new too. filter new
sparkplugs new. no fuel leaks either

never touched valves or synced carbs...
always choke to start usually cut to half choke after 30 sec.

engine has good compression and everthing.

i have an hour ride to work (give or take) and idles great when i come to stop.
 
plug is correct heat range as recommended in owners manual
 
I would at least get the valves checked to start off...when you say the carbs are spotless, was that just a visual check or were they dipped for 24 hours and all passages sprayed with carb cleaner afterwards?
 
Hi,

Long warm up times are a classic symptom of tight valves. If they are too tight for too long they will burn.

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