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Author Topic: DR 650 chokes, then backfires  (Read 395 times)

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Offline the ruffian

DR 650 chokes, then backfires
« on: March 13, 2019, 12:14:42 pm »
So, over the last few weeks I have this randomly occurring problem: Iíll be cruising along ( like quarter to a third throttle, on open road) when suddenly , and for no more than a second or two, the bike chokes and dies, and then with a single loud backfire, resumes the cruise.

It seems completely random. On a recent trip , which included the Baviaanskloof, it didnít do it for a coupla hundred Kayís, and then close to home it did it three times in a hundred Kays...?!

Can it be dirt in the carb? If so, why doesnít it affect starting , and the otherwise smooth running that the bike exudes?

Looking forward to your analysis.

With thanks...
 

Offline katana

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Re: DR 650 chokes, then backfires
« Reply #1 on: March 15, 2019, 02:19:33 pm »
Check the spark plug, cap, lead, kill switch, ignition switch, side stand switch.  Unlikely you have a fuel issue as unburnt fuel is filling your exhaust.
"The only man that has to remember anything, is the man who tells a lie" Mark Twain
 

Offline katana

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Re: DR 650 chokes, then backfires
« Reply #2 on: March 15, 2019, 02:29:09 pm »
Maybe CDI or wiring.  Long story short, probably electrical.
"The only man that has to remember anything, is the man who tells a lie" Mark Twain
 

Offline chopperpilot

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Re: DR 650 chokes, then backfires
« Reply #3 on: March 15, 2019, 07:12:21 pm »
DRs are very reliable.

I agree on Katana's analysis, but would first tick the carb off the list, as its relatively easy to remove, strip and clean, although the symtoms might not indicate a fuel problem.
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Offline the ruffian

Re: DR 650 chokes, then backfires
« Reply #4 on: March 16, 2019, 02:01:23 pm »
Good tips, all.

Thank you, K , and Ch.

Iíll let you know what transpires...
 

Offline Colin Kaapschehoop

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Re: DR 650 chokes, then backfires
« Reply #5 on: March 16, 2019, 06:06:09 pm »
Check that you havenít got water in your tank.
 

Offline the ruffian

Re: DR 650 chokes, then backfires
« Reply #6 on: March 18, 2019, 04:26:11 pm »
Whatís the best way to do that ,Colin?
 

Offline katana

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Re: DR 650 chokes, then backfires
« Reply #7 on: March 24, 2019, 09:15:36 pm »
Put a hose on the carb drain and drain the float bowl into a glass.  Any water will float in the bottom - easiest way too check..
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Offline lecap

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Re: DR 650 chokes, then backfires
« Reply #8 on: April 23, 2019, 04:18:24 pm »
My money is on the side stand switch. Check and lubricate the side stand pivot.
"If you think it's expensive to hire a professional to do the job, wait until you hire an amateur." (Red Adair)
 

Offline the ruffian

Re: DR 650 chokes, then backfires
« Reply #9 on: April 28, 2019, 04:53:59 pm »
Would you consider de-activating the side stand switch?