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Post by 454guy on Oct 10, 2012 11:15:11 GMT -6
Hi I had the 1986 454 since Dec, 2011 been running great till the petcock had to be rebuilt . The carbs were flooding so replaced the float seal set the bowl floats height to 17mm and gave a good cleaning. Put it together. The bike will not start. I have a good spark and the plugs are bone dry. There is gas in the bowls too. Any ideas? Thanks
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Post by eaglerider on Oct 10, 2012 12:41:33 GMT -6
By chance, was the bike getting a little hard to start when cold?? Sounds like perhaps fuel is not getting into the cylinders.
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Post by 454guy on Oct 11, 2012 21:43:03 GMT -6
Yes it did get harder and harder to start when cold when I adjusted the valves about a 1000 mile ago I used the smaller # you could adjust them to.
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Post by eaglerider on Oct 12, 2012 4:43:06 GMT -6
 When adjusting valves, use the higher value listed for the adjustment range. The reason is that when tightening the locknuts, it is very easy for the adjustment screw to turn just a bit, tightening the adjustment just a tiny bit, making the adjustment wrong.
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Post by 454guy on Oct 12, 2012 10:20:48 GMT -6
Well I did check each valve after I adjusted each one for clearance.
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Post by eaglerider on Oct 12, 2012 10:38:05 GMT -6
which is good....however, by using the smaller number, the time between needed adjustments drops, and can cause the valves to " tighten up " quicker. Yes, the engine is noisier when using the higher number, but that is normal for this engine, tho to "newer" owners, and those not real familiar with this engine, the noise is "scary". I'm kinda leaning towards thinking the valves have tightened up, not opening enough to let proper fuel into the combustion chamber.
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Post by 454guy on Oct 12, 2012 13:22:52 GMT -6
same here. So the should I I adjust them to?
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Post by Blaine on Oct 12, 2012 14:11:38 GMT -6
same here. So the should I I adjust them to?[/quote Adjustment to the upper limit is always better.Intake-0.13-0.18 mm. 005"-.007" Exhaust 0.18-0.23 .007"-.009"   |
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Post by 454guy on Oct 13, 2012 18:42:17 GMT -6
Did the valves now it's running great thanks so much! |
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Post by eaglerider on Oct 13, 2012 19:14:30 GMT -6
;D Love good story endings!!!
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Post by Blaine on Oct 13, 2012 20:11:26 GMT -6
Did the valves now it's running great thanks so much! Good to hear.Maintenance is key!!  |
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When adjusting valves, use the higher value listed for the adjustment range. The reason is that when tightening the locknuts, it is very easy for the adjustment screw to turn just a bit, tightening the adjustment just a tiny bit, making the adjustment wrong.
