1996 Magna knocking in left rear cylinder

cruisin · April 01, 2009, 08:42:38 AM

I went for a ride on my Magna the other day and when I returned I noticed a knock in the left rear cylinder.
The bike has been running great with no problems.
I checked the oil level, and it was fine.
The bike still runs good but has the knock at idle and accleration.
Does anyone have any ideas as to what it may be.
Thanks

hootmon · April 01, 2009, 09:00:51 AM

Quote from: cruisin on April 01, 2009, 08:42:38 AM
I went for a ride on my Magna the other day and when I returned I noticed a knock in the left rear cylinder.
The bike has been running great with no problems.
I checked the oil level, and it was fine.
The bike still runs good but has the knock at idle and accleration.
Does anyone have any ideas as to what it may be.
Thanks

I'm sure you will get some responses..
Welcome from Safety Harbor, Florida..

Where are you located??
How many miles are on your bike??

cruisin · April 01, 2009, 09:12:57 AM

I'm in the Houston area.
The bike has just a little over 14000 miles on it.

hootmon · April 01, 2009, 09:54:45 AM

Quote from: cruisin on April 01, 2009, 09:12:57 AM
I'm in the Houston area.
The bike has just a little over 14000 miles on it.

There are some Mootsters in your area.. They will probably jump in and conversate with you..

Good Luck!!

Chad in Michigan · April 01, 2009, 10:31:00 AM

Mine did that on the left front this season's startup. i found oil in the air box, specifically in the air bleeds that feed that cyl. could be bad gas or fouled plug. start checking the plugs, see what you find. if it's wet, there is a problem with the spark-but the coil that fires that plug also fires the one next to it. one coil for the front, one for the rear. if it's dry, there may not be gas or enough gas getting to it.

roboto65 · April 01, 2009, 03:13:09 PM

Yeah could be if you want or have time you could run by the house or let me know where you are I may be heading to pasadena today from my place by Conroe..

cruisin · April 03, 2009, 10:58:51 AM

Sorry I wasn't available to meet with you.
I'm just hoping it something to do with the valves or something and not a rod, or piston.

Justin · April 03, 2009, 03:03:53 PM

If it's like a slapping thrashing knock, I would check you cam chain tensioners. Both were gone on mine when i checked.

cruisin · April 03, 2009, 07:01:36 PM

Thanks for everyones input, a friend of mine who is a mechanic came by and told me the valves need adjusting.
Big worry off my mind.
Thanks again

Curtis_Valk · April 03, 2009, 08:33:36 PM

I've never heard of a Magna (or ANY Honda for that matter) needing valve adjustment at only 14,000 miles.

Curtis

John Luttrell · April 03, 2009, 09:39:30 PM

Quote from: Curtis_Valk on April 03, 2009, 08:33:36 PM
I've never heard of a Magna (or ANY Honda for that matter) needing valve adjustment at only 14,000 miles.

Curtis

Yep, my money is on the cam chain tensioner for the rear head.

Greg Cothern · April 06, 2009, 06:30:49 PM

Has the bike sat for a period of time without being ridden? As with all Magna's they get quite irritated at us for not riding them and the left rear cylinder is usually the first to clog the slow speed jet and will cause this also...

cruisin · April 09, 2009, 07:17:51 AM

The bike is ridden at least once a week.
It ran just fine with no notable noise when I took off that day. When I returned home I noticed the noise in the rear cylinder close to the valve cover.
I did ride it hard for just a bit because a Harley kept messing with me so I finally showed him what the Mag had and left him.

roboto65 · April 09, 2009, 07:32:01 AM

I get off the boat on the 21st and we could listen to it then if you like !!!