SuzukiSavage.com - Dies at high speed.

marioivargas

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Dies at high speed.
10/14/13 at 01:25:56

Here's what's happening.

The bike was sitting for a week. I turned it on and let it run with the choke for a bit to make sure it was good. It's been chilly the last few nights. The throttle sounded a little weak once it got on the rode. When I got to highway speeds it would get up to about 55 mph and slowly stall. I would have to pull over and use the choke again to get it going but it would die again at about 55 mph. It only started up again if I pulled the choke all the way out.

Where should I start the diagnostics?

Could this be the air filter, dirty carb, dirty fuel filter? It's bee running fine and this just decided to happen.

It has a raptor petcock and a dina muffler that have given me no issues.

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ToesNose Serious Thumper Offline Pardon me, do you have Hot Sauce? Posts: 1993 Mooresville, NC Gender:	Re: Dies at high speed. Reply #1 - 10/14/13 at 04:40:03 Hey Ocean had you done any work to the bike at all the week before it was left sitting? Also do you normally get the bike running at highway speeds or is that something new? Are the raptor and dyna your only mods?
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bobert_FSO

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Re: Dies at high speed.
Reply #2 - 10/14/13 at 05:59:29

Sounds like a possible vacuum petcock failure. I had similar symptoms. Fuel would stop under low vacuum conditions. At low speed under moderate load it would stall when coming to a stop. At highway speeds, it would just quit, just like running out of gas. Switching the petcock to prime would allow the engine to pick up again before it came to a complete stop.

The reason I mention this, is because the symptoms would get worse in cooler weather. I assumed my petcock diaphram was getting stiff, and in cooler temperatures, the engine vacuum just couldn't hold it open.

A Raptor petcock solved the problem.

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Dies at high speed. Reply #3 - 10/14/13 at 07:36:13 Check the vacuum line out, or, put a new one on & KNOW.. Do the petcock test OR, since you know its getting a Raptor petcock anyway,, do that, But first, run it in prime, & Drain the bowl on the carb into a jar, see if its gunky in there,
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SteveIsGr8 Junior Member Offline SuzukiSavage.com Rocks! Posts: 91 Jamestown, NC	Re: Dies at high speed. Reply #4 - 10/14/13 at 08:00:18 Check the fuel filter. Also, check that the fuel line doesn't have any slight deformation. Sometimes the fuel line will kink a bit.
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Oldfeller--FSO Serious Thumper ModSquad Offline Hobby is now "concentrated neuropany" Posts: 12672 Fayetteville, NC Gender:	Re: Dies at high speed. Reply #5 - 10/14/13 at 08:11:28 Generic fuel delivery test is to pull the line to the carb and test the fuel flow as it goes through everything -- it should be more than a cup a minute or else you will have issues. Has anyone questioned your fuel itself? Bad gas happens .....
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Dies at high speed. Reply #6 - 10/14/13 at 08:21:44 Yea, how Does it run at 25 or 30..? Good acceleration from a stop? Hows the idle?
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marioivargas

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Re: Dies at high speed.
Reply #7 - 10/14/13 at 13:44:05

It has a Raptor Petcock that I installed a couple of years back and a Dyna muffler that I installed last year.

When the bike was sold to me it had a fuel filter which I switched up three years ago.

I had the bike maintenanced back in February and all checked out fine.

It's running weak and dies at highway speeds. It only fires up with the choke all the way out.

I haven't done any work to it in months as it's been running perfectly.

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marioivargas Junior Member Offline Posts: 73 Los Angeles Gender:	Re: Dies at high speed. Reply #8 - 10/14/13 at 13:46:04 I run it on the highway for about 5 miles back and forth a few times a week to get to work. It has been getting a little colder but I ran it on a warm afternoon when it died. The horror!
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28886 L.A. California Gender:	Re: Dies at high speed. Reply #9 - 10/14/13 at 14:12:10 marioivargas wrote on 10/14/13 at 13:46:04: I run it on the highway for about 5 miles back and forth a few times a week to get to work. You're not running it enough to keep the battery charged. Try charging it.
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MrPazloe YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 23 Northern NJ Gender:	Re: Dies at high speed. Reply #10 - 10/15/13 at 06:47:33 Try the easy stuff first like putting fresh gas in and charging up the battery. If she still stalls out at 55+ then re-evaluate.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Dies at high speed. Reply #11 - 10/15/13 at 10:10:45 Yep,, BUT I dont remember getting the answer,, From a stop to 40 or so, how is it? Describe the acceleration, strong, taper off, halting,, pick a good word or 20
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Oldfeller--FSO

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Re: Dies at high speed.
Reply #12 - 10/15/13 at 10:27:29

Enough, already --- Ocean has some things to check and then he needs to get back to us with further information from those checks.

Rehashing all the things he needs to check when he hasn't had a chance to check anything yet isn't doing him any good.

So far ....

Test fuel flow rate through everything (pull the fuel line at carb inlet) flow must be at greater than a cup a minute.

Air filter dry and clean
(when installed does not block off air port in mouth of carburetor)

Recharge the battery fully. Test voltage over 13 volts fully charged.

Replace the gasoline with fresh gas

Make sure the choke goes all the way back in when the engine is warm

Run the bike and report back.

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marioivargas Junior Member Offline Posts: 73 Los Angeles Gender:	Re: Dies at high speed. Reply #13 - 10/15/13 at 17:43:51 I'll be breaking down the bike tomorrow to see what's up. I do have a few more things to add. When this happened a couple of years ago I would just turn the idle screw up and the bike would run but very high. Could this also be a spark plug problem?
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WD Serious Thumper 2005 No Login Offline Professional "scooter trash". Posts: 5207 Rosemark TN Gender:	Re: Dies at high speed. Reply #14 - 10/15/13 at 17:57:19 Unlikely. Do your carburetor tests and report back. Let's eliminate one issue at a time instead of tossing more items into the mix.
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