My latest evo problem
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Seasoned HDF Member
Joined: Jun 2015
Posts: 10,302
Likes: 7,780
From: West Central FL
My latest evo problem
My bike seems to be running a bit hot lately but I figured it was just 'cuz it's summer in Florida. But after about an hours ride on my POS 1993 Heritage Classic yesterday, when I got home I noticed the bike seemed awfully hot and the chrome cover on my rear pipe was starting to turn gold. I've checked for intake and exhaust leaks but found none. What else besides timing, could be causing this problem? If it is from timing do I need to advance or retard?
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,168
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From: Poolville
First off I would check the plugs to see if they are indeed running lean and then recheck ignition timing.. Then do you have an inferred temp gun to confirm? I think if timing is too far advanced it will create more heat, confirm that it's set properly then go to the carb or manifold leaks. Others say if it's too retarded it will create more heat but I'm not so sure about that.. I've never tested the difference..
Is there a difference in, intown riding compared to open road? Or does it matter...
Is there a difference in, intown riding compared to open road? Or does it matter...
Club Member
Joined: Apr 2011
Posts: 5,828
Likes: 7,859
From: SE Louisiana
Check VOES operation, not only switching for timing, but the diaphragm inside could create a vacuum leak.
Timing retarded enough could have the mixture burning in the pipe.
Could be running lean, you could try clearing the main jet by removing a/c, draining the carb bowl, spray some brake clean down the main nozzle emulsion tube followed by compressed air.
Timing retarded enough could have the mixture burning in the pipe.
Could be running lean, you could try clearing the main jet by removing a/c, draining the carb bowl, spray some brake clean down the main nozzle emulsion tube followed by compressed air.
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,631
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From: Cental, MI
Yes...Retarded timing causes excess Heat... lots of it if severely retarded.. BTDT on a Mistake.
Intake leak will also (lean mix) but usually manifests itself in much more noticeable Problems First! Obstruction of cooling air possibly, ...Sidecar comes to mind!! had that also.. Very poor oil Flow can cause excess heat, ...tho in general, if the Lifters don't Clatter (assuming Not Solids) low flow is Doubtful, (Not Impossible).
Oil Temp Gauge???
Intake leak will also (lean mix) but usually manifests itself in much more noticeable Problems First! Obstruction of cooling air possibly, ...Sidecar comes to mind!! had that also.. Very poor oil Flow can cause excess heat, ...tho in general, if the Lifters don't Clatter (assuming Not Solids) low flow is Doubtful, (Not Impossible).
Oil Temp Gauge???
Club Member
Joined: Sep 2010
Posts: 15,445
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From: Beyond Fucital
After checking for an intake leak, check the nose cone and make sure the pick up hasn't moved.
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Grand HDF Member
Joined: Apr 2007
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From: Brighton, MI
And post pics of your plugs. A heat gun is pretty cheap nowadays, it's a good suggestion and a great tool to have. The only issue I have with them is they don't like (not accurate) on shiny surfaces.
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Thread Starter
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Seasoned HDF Member
Joined: Jun 2015
Posts: 10,302
Likes: 7,780
From: West Central FL
First off I would check the plugs to see if they are indeed running lean and then recheck ignition timing.. Then do you have an inferred temp gun to confirm? I think if timing is too far advanced it will create more heat, confirm that it's set properly then go to the carb or manifold leaks. Others say if it's too retarded it will create more heat but I'm not so sure about that.. I've never tested the difference..
Is there a difference in, intown riding compared to open road? Or does it matter...
Is there a difference in, intown riding compared to open road? Or does it matter...
Thread Starter
|
Seasoned HDF Member
Joined: Jun 2015
Posts: 10,302
Likes: 7,780
From: West Central FL