**UPDATE**Where could it be leaking from?
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Road Captain
Joined: Nov 2007
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**UPDATE**Where could it be leaking from?
The last week or so my bike has been running rougher and rougher when cold and at very low RPM's (even when warm). At first I thought it was a bad tank of gas. But I have been through at least 4 full tanks since I noticed it.
Today I decided to track it down. It is the rear cylinder. Plug color is lean, and that cylinder is not even firing when cold. Obvious conclusion on my part was a leak at the exhaust gasket. Too double check I sprayed some ether around the rear exhaust flange, fully expecting the rpm's to jump. NOTHING.
So I sprayed around the intake manifold, again NOTHING.
Where else could I be sucking air?
(Bike is carbed).
Today I decided to track it down. It is the rear cylinder. Plug color is lean, and that cylinder is not even firing when cold. Obvious conclusion on my part was a leak at the exhaust gasket. Too double check I sprayed some ether around the rear exhaust flange, fully expecting the rpm's to jump. NOTHING.
So I sprayed around the intake manifold, again NOTHING.
Where else could I be sucking air?
(Bike is carbed).
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Road Captain
Joined: Nov 2007
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RE: Where could it be leaking from?
ORIGINAL: mkusky
nowhere that i know of check for spark , if you have spark then check compression .
Change plugs check coils and leads
nowhere that i know of check for spark , if you have spark then check compression .
Change plugs check coils and leads
Banned
Joined: Mar 2007
Posts: 3,706
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From: Woodstock, Ont , Can
RE: Where could it be leaking from?
Swap the plugs from front to back and see if the miss follows the plug change. If not, time for a compression check . You can also put the bike up on the lift and put it in fifth gear. Have someone turn the wheel and listen in the breather,for the intake valve and exhaust, and oil fill hole for ring conditions.. Compare it to the front cylinder to see if any different in sound between the two. This test will help find or rule out a specific problem and you can go from there if needed.
Ron
Ron
Ultimate HDF Member
Joined: Dec 2006
Posts: 8,294
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From: Po-Dunk Looziana
RE: Where could it be leaking from?
Run some Chemtool B12 thrua tank of gas or two. This will help clean possible sticky floats and needle valves. Everybody in my family rides and we swear by this stuff, carbs and EFI bikes, all benefit.
Stellar HDF Member
Joined: Dec 2006
Posts: 2,906
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From: Grottoes Va.
RE: Where could it be leaking from?
check the wires and plugs. swap the plugs and see if the problem moves. Also check the coil.
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Road Captain
Joined: Nov 2007
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RE: Where could it be leaking from?
Just swapped the plugs. The problem did not follow the plugs. Will check wires, if that is not it, then I guess it is into the shop to take advantage of my extended warranty.
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Road Captain
Joined: Nov 2007
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**UPDATE** Where could it be leaking from?
Just got back from the dealer.
It appears it was not sucking air at all. Coil was starting to go bad.
They replaced it, appears to have fixed the problem.
It appears it was not sucking air at all. Coil was starting to go bad.
They replaced it, appears to have fixed the problem.
Stellar HDF Member
Joined: Dec 2006
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From: Grottoes Va.
RE: **UPDATE** Where could it be leaking from?
Happy to hear your scoot is back to running good, nothing worse than haveing a problem you can't find, except maybe a blue hair in a buick with a cellphone.