1983 XV920 Pops and crackles at low throttle (Columbia City IN)

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kollertk
Posts: 3
Joined: Thu Jun 10, 2021 9:14 am
Location: Columbia City IN
What Virago you Own: 1983 xv920

1983 XV920 Pops and crackles at low throttle (Columbia City IN)

Post by kollertk » Thu Jun 10, 2021 9:32 am

83 vx920 idles fine, cruises at high speeds fine, but pops and crackles when a small amount of throttle is given. I believe it even backfired enough to kill the engine once, when riding. But the bike has a lot of power/acceleration at high speed. Anyone else had this issue?

TGWilson
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Joined: Fri Aug 07, 2020 10:38 am
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Re: 1983 XV920 Pops and crackles at low throttle (Columbia City IN)

Post by TGWilson » Thu Jun 10, 2021 12:57 pm

I'm. Having the same problem. I'm currently trying to put some carb cleaner through and I'm hoping that will help. Crossing my fingers I don't have to pull the carbs out

kollertk
Posts: 3
Joined: Thu Jun 10, 2021 9:14 am
Location: Columbia City IN
What Virago you Own: 1983 xv920

Re: 1983 XV920 Pops and crackles at low throttle (Columbia City IN)

Post by kollertk » Tue Jun 15, 2021 5:09 pm

Any one have any suggestions or insight? It would be greatly appreciated

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ViragoJoe
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Posts: 2672
Joined: Wed May 20, 2015 10:36 am
Location: S.E. Michigan, USA
What Virago you Own: 1996 Virago Special XV1100SH

Re: 1983 XV920 Pops and crackles at low throttle (Columbia City IN)

Post by ViragoJoe » Wed Jun 16, 2021 12:01 am

kollertk wrote:
Tue Jun 15, 2021 5:09 pm
Any one have any suggestions or insight? It would be greatly appreciated
Koller,

Need more information regarding your bike.

How long have you had the bike?

How many miles are on the bike?

When did this popping and cracking start?

Is the bike totally stock or has modifications been made:
Like Carburetor Air Cleaner Mods, etc.?
Aftermarket exhaust pipes?

When was the last time valve were adjusted?

When was the last time the Carburetors were Synchronized?

When was the last time the plugs were changed and/or re-gapped and what are their gaps currently.

Take pictures of the current spark plug electrodes conditions and attach them.
Label which is front and which is rear.
What brand are the spark plugs and there I.D. numbers (example: NGK BP7ES or BPR7ES).
ViragoJoe 🇺🇸
1996 XV1100SH Virago Special
"Never ride faster than your Guardian Angel can fly!!"
;)


NOTE TO ALL:
:arrow: Please edit your profile to include your location & Bike Information.
It will aid us in assisting you!

kollertk
Posts: 3
Joined: Thu Jun 10, 2021 9:14 am
Location: Columbia City IN
What Virago you Own: 1983 xv920

Re: 1983 XV920 Pops and crackles at low throttle (Columbia City IN)

Post by kollertk » Wed Sep 08, 2021 1:07 pm

I have had the bike for about 5 months now.

Bike has 19,000 miles.

The bike ran fine for about two weeks after I bought it, then the popping/cracking began to get worse and worse until I couldn't get it to idle at all. I removed the carbs and cleaned them, found that the hoses from the carb to the cylinders were ripped and replaced them hoping that would fix the problem. No luck, same problem as before. Sometimes the bike will have low power and then bang, backfire and the bike will zip away with lots of power suddenly.

Everything is stock minus the gen 2 starter upgrade I did.

I have yet to play with valve timing or synchronize the carbs, or replace plugs for that matter. I am at school so I don't have all my tools, including feeler gauges, but I can get back to you on the current gap size.

Brand & ID: NGK BR7ES.

Front cyl plug:
https://drive.google.com/file/d/1YdsCDV ... sp=sharing
https://drive.google.com/file/d/1xjRtJs ... sp=sharing

Rear cyl plug:
https://drive.google.com/file/d/12oWuD6 ... sp=sharing
https://drive.google.com/file/d/1EssDXM ... sp=sharing

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ViragoJoe
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Posts: 2672
Joined: Wed May 20, 2015 10:36 am
Location: S.E. Michigan, USA
What Virago you Own: 1996 Virago Special XV1100SH

Re: 1983 XV920 Pops and crackles at low throttle (Columbia City IN)

Post by ViragoJoe » Wed Sep 08, 2021 1:54 pm

kollertk wrote:
Wed Sep 08, 2021 1:07 pm
I have had the bike for about 5 months now.

Bike has 19,000 miles.

The bike ran fine for about two weeks after I bought it, then the popping/cracking began to get worse and worse until I couldn't get it to idle at all. I removed the carbs and cleaned them, found that the hoses from the carb to the cylinders were ripped and replaced them hoping that would fix the problem. No luck, same problem as before. Sometimes the bike will have low power and then bang, backfire and the bike will zip away with lots of power suddenly.

Everything is stock minus the gen 2 starter upgrade I did.

I have yet to play with valve timing or synchronize the carbs, or replace plugs for that matter. I am at school so I don't have all my tools, including feeler gauges, but I can get back to you on the current gap size.

Brand & ID: NGK BR7ES.

Front cyl plug:
https://drive.google.com/file/d/1YdsCDV ... sp=sharing
https://drive.google.com/file/d/1xjRtJs ... sp=sharing

Rear cyl plug:
https://drive.google.com/file/d/12oWuD6 ... sp=sharing
https://drive.google.com/file/d/1EssDXM ... sp=sharing

kollertk,

Check your repair manual, but I believe the correct plug for your XV920 is [BP7ES (Non-Resistor Plug)] or BPR7ES (Resistor Plug). Either should work fine.

The "P" in the I.D. means it has a projected Insulator. BR7ES do not. The BR7ES are Resistor plugs without Projected Insulator.

Look at your plug, then look at this one. The Projected Insulator places the plug electrode more into the combustion chamber to fire off the fuel:

Click Image to Enlarge
BP7ES:
Correct Spark Plug with Projected Insulator..
spark-plug-ngk-bp7es.jpg

Click Image to Enlarge:
BR7ES:
Your Spark Plug.
NGKBR7ES_Bougie_NGK_BR7ES_02x1200.jpg
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ViragoJoe 🇺🇸
1996 XV1100SH Virago Special
"Never ride faster than your Guardian Angel can fly!!"
;)


NOTE TO ALL:
:arrow: Please edit your profile to include your location & Bike Information.
It will aid us in assisting you!

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