VegasVic Posted December 23, 2009 Share #1 Posted December 23, 2009 So, I've been trying to figure out why # 3 is not firing. I have spark, I can see fuel flowing into all 4 carbs from the needle which holds the slides while bike is running. If I drip a little gas into the carb for #3, the rpms come up and the pipe gets hot, so it def. a fuel problem ANyone know why I can see fuel flowing from around the needle seat which holds the slides in the carb, but cylinder doesn't fire unless I drip some fuel into it? I am planning to put back together and run it that way to see if the cylinder is firing under riding conditions. Maybe an idle circuit problem? Link to comment Share on other sites More sharing options...
naturbar Posted December 23, 2009 Share #2 Posted December 23, 2009 do a compression test. them valves gotta be opening and closing to insure intake (fuel) - compression (combustion) - exhaust (bye bye bad fumes). Link to comment Share on other sites More sharing options...
BoomerCPO Posted December 23, 2009 Share #3 Posted December 23, 2009 Do a Coil check for that #3. Mine did the same thing last year. Coil checked out weak and was replaced.Problem solved. Boomer.....who says don't blame me cuz I'm no fish-head-eating Engineer who designed that component. Link to comment Share on other sites More sharing options...
VegasVic Posted January 22, 2010 Author Share #4 Posted January 22, 2010 Had a seasoned mechanic pull carbs and check and clean them. Also had him adjust the valves as long as we were that far into it. He did not find anything really wrong with the number 3 carb, but thought one of the passages may have been blocked. Anyway, put it back together, and all 4 cylinders are now firing. Link to comment Share on other sites More sharing options...
spear Posted January 22, 2010 Share #5 Posted January 22, 2010 Sometimes that's all ANYTHING needs that don't wanna work proper like. Just pull it down and put it back together again - and there you go! Link to comment Share on other sites More sharing options...
Cougar Posted January 22, 2010 Share #6 Posted January 22, 2010 Same as Bommer last year, My # 3 coil was dead or weak. Note: after sending my coil to VGoose he says it was only the plug cap. (found replacements at Pinwall about 25/29? bucks for 4 of them) If you look under were the 1 and 3 coils are there are the wires that connect to them and they face down to the ground collecting all kinds of road dirt and grim. Just a thought. Jeff Link to comment Share on other sites More sharing options...
VegasVic Posted January 23, 2010 Author Share #7 Posted January 23, 2010 I had the #3 coil out and checked those wires. Believe me , I checked all the wiring. Cleaned the springs and brass washers in the plug wires. I even lightened the bike by a few pounds by getting rid of all of the components for the AIS. Guess I could have pulled the carbs and cleaned them myself, but had a good mechanic who has done carb work for a lot of years do it. Anyway, bike running like new again Link to comment Share on other sites More sharing options...
LilBeaver Posted January 23, 2010 Share #8 Posted January 23, 2010 That's some good news man! Link to comment Share on other sites More sharing options...
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