SuzukiSavage.com - More throttle = less fuel

Eegore

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More throttle = less fuel
03/01/23 at 13:34:51

I tried searching for this but didn't find anything specific to my issue even though I am sure it exists here somewhere:

1995 with Raptor petcock, stock carb, and throttle assembly.

It starts fine and idles, but when throttle is applied, in neutral, the bike dies. Essentially more throttle twist equals less fuel. There is no difference if the choke is pulled out all the way. I noticed it likes to slip back into the intermediary position so a choke replacement might be in order.

I assume this is a carb issue, but I'd like to make an order of operations. The petcock is clear, fuel is flowing, so do I work my way to the airbox/filter or just go into the carb first?

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Gary_in_NJ Serious Thumper Offline LS650 Cafe Racer Posts: 2642 Amongst the Twisty Roads	Re: More throttle = less fuel Reply #1 - 03/01/23 at 14:28:58 I suspect that you either have a clogged jet, or the diaphragm in the upper chamber is cracked or not properly seated.
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Ruttly Serious Thumper Offline Thumpers Rule Posts: 5401 Manteca , CA Gender:	Re: More throttle = less fuel Reply #2 - 03/01/23 at 16:08:42 Change that air filter lately ? Are you running a fuel filter ? Fuel is flowing. If it’s not any of those then carb is dirty and needs blown out. Stock carb it could be a massive vacuum leak too ! Big fun .
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Eegore Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 9086	Re: More throttle = less fuel Reply #3 - 03/01/23 at 18:52:35 Air filter is clean, no in-line fuel filter. Looks like I am doing some carb checks next. I'm pretty sure I have a Mikuni sitting around somewhere so maybe I should just try to put that in. Thanks for the input.
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28996 L.A. California Gender:	Re: More throttle = less fuel Reply #4 - 03/01/23 at 21:21:03 Most likely clogged main jet but I think I had the same symptoms with bad float ht. if it were a bad diaphragm, it just wouldn't accelerate, not up and die.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: More throttle = less fuel Reply #5 - 03/02/23 at 04:10:45 Sitting, idling, all good,a twist on the stick and it just Dies? I've seen that happen with old gas,, If it's old gas, it's easy to swap out. Otherwise, as has been noted, if it was the petcock it wouldn't die. If you can drop the bowl you can access the jets.
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Eegore Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 9086	Re: More throttle = less fuel Reply #6 - 03/02/23 at 05:19:18 Sitting, idling, all good,a twist on the stick and it just Dies? I've seen that happen with old gas,, I'm not sure when this bike was ridden last, I had not considered the gas. I will have it drained and replaced.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: More throttle = less fuel Reply #7 - 03/02/23 at 05:50:16 Good luck,,Let us know
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pg Serious Thumper Offline Posts: 5274 In Transit	Re: More throttle = less fuel Reply #8 - 03/02/23 at 06:10:47 If you leave ethanol gas in there to long, it can gum up the carb as well. I won't put that stuff anymore. Best regards,
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LANCER Serious Thumper Alliance Member Offline Savage Beast Performance Parts Posts: 10802 Oklahoma Gender:	Re: More throttle = less fuel Reply #9 - 03/02/23 at 11:38:06 There are some NASTY carbs out there. 😷 Colors and consistencies normally associated with refuse.
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ohiomoto

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Re: More throttle = less fuel
Reply #10 - 03/02/23 at 19:27:38

My bike had a worn and sticky slide a few years back and acted as you described. One time it wouldn't go over 20 mph in any gear. I cleaned it up and it worked well for a while.

Later that summer it stuck hug up again on a gear shift and it went from 45 to 20 in a hurry. It limped along for a few seconds before it freed up and went back to normal.

I purchased a replacement slide it's been problem free ever since. If the black coating is worn off and sticking to the body of the carb it is time to get a new one.

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: More throttle = less fuel Reply #11 - 03/02/23 at 19:41:55 How many miles on it?
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Eegore Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 9086	Re: More throttle = less fuel Reply #12 - 03/02/23 at 19:55:09 "How many miles on it?" I'm not sure, I am not near it but I'd say around 20k.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: More throttle = less fuel Reply #13 - 03/02/23 at 21:36:50 Doesn't sound like enough miles to have worn the slide,unless it was subjected to a buncha dirt,enough to get through the air filter. It's not one of those bikes that got a few miles being dragged, is it?
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Eegore Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 9086	Re: More throttle = less fuel Reply #14 - 03/03/23 at 09:19:34 Nah the drag and drop was a one-time deal. It was a Harley anyway, we needed the weight.
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