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I have a 79 xs 1100, recently I've noticed it's running hotter on right cylinders. Used a temp gun and found that after a ten mile ride it gets up into the mid 200's where left side was only up to low 200's. Anyone have any idea's on why it would do that?
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79 XS11: SOLD -
Pull your plugs and see how they look. Obviously as you know, the hotter pipes are running leaner than the cooler pipes.1979 XS1100F
2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights. -
Make sure both sides of the bike's pipes are in the same condition, ie not aiming at a tarnished one or a rusty one then comparing to clean chrome as I notice a difference as well if I do that.1979 XS1100 w/Factory Fairing <Need left cover>
1979 XS750 Special <Sold Spring 15>
1977 XS750
1978 IT250
1987 YFM350Comment
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Temperature
You mention "cylinders". Not sure what you mean by that but you should measure each exhaust header pipe temperature with the gun. 200 degrees is not a hot enough exhaust temperature even at idle. If each cylinder is firing correctly, you would not be able to touch any of the pipes. If you are pointing the gun at the cylinder head, you will not obtain accurate information there.
As also mentioned, look at the spark plugs and see if there are any differences between them - color wise or if one or more is wet.
Are you having a particular running issue?
Mike1981 XS1100H Venturer
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