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Author Topic: I almost miss the backfire  (Read 1997 times)

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eldar

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I almost miss the backfire
« on: June 14, 2005, 02:20:17 PM »
Well this weekend I had the Pleasure? of working on my bike. I have had this running rich problem for the last couple of years now. This weekend to took some ideas that us bike witchdoctor come up with and tied them. I swaped the spark leads for 2 and 3 to see if the problem would move from #2 to #3. It did no so I KNEW it was the carbs >:(
Well took them off and checked floats and made sure float seat was clean and actually swapped the floats from 2 and 3. MADE SURE my accel pump sealed and worked correctly. Looked at my needle and found nothing but a needle that looked like it was out of the package (less than 14000 miles). Put it all together with out thinking I had really accomplished something, other than pulling the carbs off...again.  Started it and......what the hell! No more backfire from #2!!!! ;D
holy crap holy crap holy crap! I never though it would happen!

ok now that I am done gushing about it, I need to adjust low speed mix. My screw are on the engine side and if I remember correctly, I tunr my screws IN to lean the mix, out to richen.  Is this right? I keep forgetting so this time I am writting it down!

Thanks to all those who have trouble. Nothing like using someone elses misery for MY gain!! ;D
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Offline cb650

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Re: I almost miss the backfire
« Reply #1 on: June 14, 2005, 02:55:16 PM »
I missed mine on the 360 twin going through Isenhower tunnel. its around 2 miles long.



                        Terry
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18 grand and 18 miles dont make you a biker

eldar

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Re: I almost miss the backfire
« Reply #2 on: June 14, 2005, 02:58:24 PM »
I think that is more due to the reactions of other drivers as you backfire next to them!
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Offline 78 k550

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Re: I almost miss the backfire
« Reply #3 on: June 14, 2005, 09:26:36 PM »
Glad you got if figured out. Mine backfire's alot. I was up last night cleaning the only points I got till the new one's come in. There a little pitted and have new plugs. I dwelled the points and got 1&4 dead on time, but 2&3 where just a little retarded. I stopped by my local fix-it place and knows the older bike's. He took one look at my 4 to 1 and said they load up and back fire. Humm.
 Do most people's 4 to 1 pipe pop? doesn't sound really like a backfiring.

Paul
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Paul
Littleton, CO

76/77 CB 750F, 
75 GL1000, (AKA GL1-242 NGWClub),
76 GL1000 LTD
84 GL1200 Standard
6 Bultaco's= 42, 49, 121, 152, 167, 188

Offline Harry

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Re: I almost miss the backfire
« Reply #4 on: June 14, 2005, 11:34:51 PM »
Yes, if adjusting screw is on the engine side, it is a fuel screw and IN = leaner, OUT = richer. If screw is on airbox side it is an air screw, IN = richer. Think about it, once you do it will seem so logical you will never forget it  ;)
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Harry Teicher, member #3,  Denmark....no, NOT the capital of Sweden.

Offline dpen

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Re: I almost miss the backfire
« Reply #5 on: June 17, 2005, 03:33:39 AM »
Check the muffler on your 4 into 1. A lot of them are a sloppy fit & suck air. Anyway, what's up with a backfire? Sounds lovely on the overrun.
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