Smoky Jo(ta)

GT

GT

Full member
Hi, thanks to all who gave me advise on my poor running newly purcahsed Seruies 2 180 Jota, I now have her running well, no pops and bangs and idles ok. Now I find that she produces a great deal of smoke after she has been at idle for a minute or two after a long fast run. for example, drive 10 miles at 80 mph, then stop at traffic lights. When you pull away, right hand exhaust (only) smokes badly for a few seconds, then clears up. It happpens after most fast runs. Next time, starts fine, normal smoke whilst on choke, then will do same again - only after idling. I am running it on Valvoline to enhance the octane rating - last owner ran it on straight unleaded I think. Odometer shows 38k miles.

Plugs - left running on the lean side of brown, right is running correct colour, centre pot is decent colour, but maybe a bit wet / oily.

Any thoughts

Regards
Glenn

 
Remove the right hand exhaust and see if there is a wet exhaust guide or if the exhaust gasket is leaking causing a suction at the valve guide there may be tell tale oil exiting around the cylinder head below the exhaust pipe, or check your air cleaner element isn't of the oiled variety or if not it may be in your cylinders.
M.
 
glenn, smokin after a bit of idle is normally a sign of valve guide wear
but, before you jump into thinking the head should come off
do as maurice suggests
check the exhaust gaskets
mind you don't overtighten the alloy roses lest they deform or crack
cheers,
scott
 
GT said:
Hi, thanks to all who gave me advise on my poor running newly purcahsed Seruies 2 180 Jota, I now have her running well, no pops and bangs and idles ok. Now I find that she produces a great deal of smoke after she has been at idle for a minute or two after a long fast run. for example, drive 10 miles at 80 mph, then stop at traffic lights. When you pull away, right hand exhaust (only) smokes badly for a few seconds, then clears up. It happpens after most fast runs. Next time, starts fine, normal smoke whilst on choke, then will do same again - only after idling. I am running it on Valvoline to enhance the octane rating - last owner ran it on straight unleaded I think. Odometer shows 38k miles.

Plugs - left running on the lean side of brown, right is running correct colour, centre pot is decent colour, but maybe a bit wet / oily.

Any thoughts

Regards
Glenn
Click to expand...

Humm..all three pipes join under the bike to a central single collector, then split into two, right and left mufflers (if you can call them that). Any smoke should be mixed with the exhaust and exit evenly out both sides.
fklavjotbox-1-600.jpg


Don't know why you would only get smoke out the right hand side muffer unless something was in that pipe only and getting hot? Wiser minds might have a solution.
 
Interesting..exhaust pulses from the right cylinder go to left muffler and the left cylinder exhaust go the right muffler and the center is ????

It would be an interesting experiment with some WD40 sprayed into each carburetor while running..and see which side the smoke would exit.

Repaired a 3c years ago which had a smoke problem. The valve stem seal on #3 intake had been poorly installed and mangled by a dodgy PO. It would smoke out of both mufflers once warmed up. It had the more restrictive collector and mufflers..who knows?
 
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