Mark,
IMHO ... you need to sync the carbs ..... I would be surprised if that
does not resolve the problem. Otherwise, an exhaust leak, a lean pilot
mixture, or an air leak, (possibly a manifold o-ring or rubber spigot
boot), is responsible.
campbell
----- Original Message -----
From: "Mark Smith" <[EMAIL PROTECTED]>
Subject: Backfireing in Exhaust
> snip <
> During deceleration I have popping and backfiring in the
> exhaust, usually at ~4000 +-500 rpm. Some of the backfires
> are quite severe. I pulled the pilots and blew air through the
> circuit this morning, if anything it is worse. My plugs look
> OK, maybe a little dark but not bad. It did it before I drilled the
> exhaust but I don't think it was as bad and it was not as
> noticeable. I need some help here I am running out of ideas.
> Going to order a Synchrometer to sync carbs as soon as I
> find out where to order from.
> snip <
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