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Gs 850 poor starting from cold

  • Thread starter Thread starter bazit
  • Start date Start date
B

bazit

Guest
Hi
Just got a 850 (1980) that someone has messed with, its been hand painted (frame ) without the engine being taken out but that aside it hasn't run for 5 years.
The problem well maybe problems are that when its cold its a pig to start but once warm it starts fist time but runs erratic. The rpm will not stay constant and it pops now and again from the exhaust which is not standard, its a 4 into 1 Motad in good condition. I have checked for spark and all plugs are OK its running a standard air box but the filter element is shot, once its warm it revs cleanly but number 2 cylinder really doesn't get that hot at the header (85 degrees c) the rest are around 185 .
The plugs are sooty after a short while so this would suggest rich settings .I am not sure what the previous guy did with the carbs if any jets have been changed because of the exhaust .
This is my first Suzuki 4 stroke previously all have been 2 stroke Suzuki GT 380
Any help would be great .
I live in the UK
Regards
Bazit
 
Sitting on bike #1 cylinder is on left (under clutch lever) ?? Ok, then#2 should have vacuum connection to petcock. Probably leaking causing fuel to foul out #2 plug, so that cylinder doesn't get hot.
Best to plan on full monty carb removal and dip. During this, you can determine what jets are in there.

this guy has same bike (usa version) and a warehouse of info, so do some reading

http://members.dslextreme.com/users/bikecliff/

welcome, to the four stroke world
 
The two primary culprits for poor cold starting are improper valve adjustment and dirty carbs.

Click on the link to our "library" that Tom gave you an be prepared to spend a few weeks reading up on these fine bikes.

.
 
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