SuzukiSavage.com - Advice on replacing a carburetor?

KazamaSmokers

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Advice on replacing a carburetor?
07/13/20 at 16:27:00

Pipes glowing red. Bike backfires whenever it is shut off. mechanic at the corner believes I need to replace the carburetor. Suzuki carb is very expensive for my teacher budget. Is there a relatively inexpensive aftermarket carb that anyone would recommend? Not looking for extreme performance. Just budget-friendly reliability. Thanks in advance for any help you can provide.

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Ruttly Serious Thumper Offline Thumpers Rule Posts: 4997 Manteca , CA Gender:	Re: Advice on replacing a carburetor? Reply #1 - 07/13/20 at 16:47:36 Have you replaced petcock with a raptor petcock? Must use a OEM Yamaha petcock.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Advice on replacing a carburetor? Reply #2 - 07/13/20 at 17:21:23 mechanic at the corner believes I need to replace the carburetor. Almost NEVER actually needs done. Some history on the bike would be nice Have you ever seen it run okay? MIles, model, how stored, last ran, History
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Dave

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Re: Advice on replacing a carburetor?
Reply #3 - 07/13/20 at 18:14:29

KazamaSmokers wrote on 07/13/20 at 16:27:00:

Pipes glowing red. Bike backfires whenever it is shut off.

If you are talking about the inside of the muffler glowing red as seen from behind the bike at night......and a bang when you shut the bike off - those things are kind of normal for this bike. Harley mufflers are a popular replacement muffler and off a bit better sound than the stock muffler - and from behind you can see the interior baffle glowing red.

The "pop" or "bang" when you turn the bike off comes from the unburned fuel that gets pumped into the hot exhaust at shut down. When you turn off the ignition you have killed the spark and the fuel/air mixture does not get ignited in the cylinder - but as the engine slows down it is still sucking air through the carb where it picks up fuel.....and then it gets pumped into the hot exhaust - where it is ignited by the hot exhaust system. My bike makes a small "woof" sound now and then - while some bikes can make a shot gun blast! A loud muffler, lean idle mixture and a high idle speed all tend to make the explosion at shut down louder.

How does it run the rest of the time? Does it start easy and run smoothly?

As others have said - carb replacement is not normally required unless something is broken.......a good cleaning and jet changes can solve most issues.

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ohiomoto Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2681 WTF is JOG?	Re: Advice on replacing a carburetor? Reply #4 - 07/13/20 at 18:26:27 Never trust the mechanic on the corner if he tells you need a new carb!
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KazamaSmokers YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 3 Worcester, MA Gender:	Re: Advice on replacing a carburetor? Reply #5 - 07/13/20 at 19:07:24 Dave wrote on 07/13/20 at 18:14:29: KazamaSmokers wrote on 07/13/20 at 16:27:00: Pipes glowing red. Bike backfires whenever it is shut off. If you are talking about the inside of the muffler glowing red as seen from behind the bike at night The exhaust header glows red, even at idle, which is high.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Advice on replacing a carburetor? Reply #6 - 07/13/20 at 20:53:30 Allowing it to run on the sidestand doesn't lube the high end of the cam. Don't do that. If it's idling long enough to get the exhaust red, Don't do that.
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zipidachimp Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1380 surrey, b.c. Gender:	Re: Advice on replacing a carburetor? Reply #7 - 07/14/20 at 01:16:06 If you are close to sea level, check your carb jets: 52.5/150 plus or minus 1 size, richer is better than leaner. See Tech Reference section for tuning. Lots of info here. Cheers!
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verslagen1

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Re: Advice on replacing a carburetor?
Reply #8 - 07/14/20 at 07:52:43

KazamaSmokers wrote on 07/13/20 at 19:07:24:

Dave wrote on 07/13/20 at 18:14:29:

KazamaSmokers wrote on 07/13/20 at 16:27:00:

Pipes glowing red. Bike backfires whenever it is shut off.

If you are talking about the inside of the muffler glowing red as seen from behind the bike at night

The exhaust header glows red, even at idle, which is high.

Any bike will do that if it's standing still for an extended period.
Don't let it sit idling for more than a minute,
Start it, get your stuff on, ride it easy till it's fully warm... a couple of miles.
The carb is jetted lean from the factory and will actually run better with a main jet a couple of sizes larger.
Which should fix the glowing pipe problem too.

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KazamaSmokers YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 3 Worcester, MA Gender:	Re: Advice on replacing a carburetor? Reply #9 - 08/08/20 at 14:20:28 Hey, I can't thank you folks enough for the advice. Took her in, got the carb cleaned... she's running like brand new. You people saved me a lot of time, money and frustration. Can't thank you enough.
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