Posted by Chilly on June 26, 2007, 12:00 pm
Shirley a round for the collected wisdom ...
My old 82 FXR had been sitting too long whilst waiting for her new pipes.
Got em installed and started taking her for rides, and she did real well.
except for an occaisional backfire on decel. Till last night ...
I rode her to work, and on the way home she started missing badly, lost
power, and was bikefiring almost constantly. Of course this was at 11 pm
in a residential neighborhood [sheepish grin]. I limped home and put her
away.
This morning I pulled the plugs. The rear cylinder plug looked great -
nice and tan. The front was black and fouled. I cleaned it up, fired
her up and took her for a ride. She ran rough for a bit, then cleaned up
and ran pretty well. I tweaked the idle and fuel mixture till she was
purring. I rode her again, and she ran well, with no more backfiring. At
startup she occaisionally backfires on the first crank.
It occured to me that she has the same plugs as when I bought her, I have
no idea how old they are, she shirley could use a new pair, and it could
be as simple as that. Or not ... I'm thinking I'll put a fresh pair in
her, and watch how they do.
So, the questions that remain in my mind are:
- Am I on the right track? Is there some other reason why the front
would be fouled and the rear looks good? Coil? Ignition? Something
else?
- What plugs do folks like to run on a shovel with only stage one mods?
Drinks on my tab till this thread runs dry.
--
Chilly BS#226
I have seen the fnords
Posted by SteveT on June 26, 2007, 12:51 pm
:The rear cylinder plug looked great -
:nice and tan. The front was black and fouled. I cleaned it up, fired
:her up and took her for a ride.
You can clean a fouled plug, but replacing it is way better. After
replacement, check both plugs a couple of times to see if the front
cylinder continues to foul.
--
Posted by Chilly on June 26, 2007, 1:01 pm
>
>:The rear cylinder plug looked great -
>:nice and tan. The front was black and fouled. I cleaned it up, fired
>:her up and took her for a ride.
>
> You can clean a fouled plug, but replacing it is way better. After
> replacement, check both plugs a couple of times to see if the front
> cylinder continues to foul.
That's what I'm thinking ... Thanks for the validation!
--
Chilly BS#226
I have seen the fnords
Posted by SteveT on June 26, 2007, 1:38 pm
:That's what I'm thinking ... Thanks for the validation!
You are valid!
--
Posted by Maineiac on June 26, 2007, 2:27 pm
> Shirley a round for the collected wisdom ...
> So, the questions that remain in my mind are:
> - Am I on the right track? Is there some other reason why the front
> would be fouled and the rear looks good? Coil? Ignition? Something
> else?
> - What plugs do folks like to run on a shovel with only stage one mods?
> Drinks on my tab till this thread runs dry.
You could always swap those plugs from one cylinder to the other and see if
the fouling follows. Might be easier just to replace them instead and see
if the front one continues to have problems though.
Maineiac
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>:The rear cylinder plug looked great -
>:nice and tan. The front was black and fouled. I cleaned it up, fired
>:her up and took her for a ride.
>
> You can clean a fouled plug, but replacing it is way better. After
> replacement, check both plugs a couple of times to see if the front
> cylinder continues to foul.