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Mo Lee
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« on: September 20, 2011, 04:03:46 PM » |
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My 97 Valk was popping from #6 exhaust today, already gave it a double shot of seafoam when I got home. The popping was only at steady rpm between 2 and 3 thousand rpm. Under heavy acceleration it runs normal and slight popping on decel. Couple of weeks ago I changed the plugs and #6 was running rich so I drained the bowl and it was running fine until this morning. I'm thinking bad fuel or a little dirt in the carb however I remember a lot of post about popping from leaking exhaust gaskets. My popping seems to be from misfiring so am I correct in assuming it is not leaking exhaust? This bike always want premium fuel and it may be the fuel at the gas stations is getting stale because of high prices. I hate to tear into the Carbs however I will if I have to. I know a lot of you have had Valks longer than me so any input would help.
Thanks
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Bone
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« Reply #1 on: September 20, 2011, 04:49:47 PM » |
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Check the #6 plug again. Two years ago my 98 acted about the same. My #6 plug was fouling from a very rich mixture. What I found was I could swap the plug with the plug from the next cylinder and continue riding about 50 miles and the cleaner plug would foul. The cause was the diaphragm in the petcock had a tear. The extra gas was running from the petcock down the vacuum line creating a very rich mixture. I ordered the rebuild kit and while waiting converted the petcock to manual by following a post I found. Still running manual  |
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sandy
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« Reply #2 on: September 20, 2011, 05:33:44 PM » |
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Unless you've modified the bike, it only requires regular fuel. You're wasting your $$$ on premium.
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YoungPUP
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« Reply #3 on: September 20, 2011, 05:42:20 PM » |
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Check for a vacuum leak at the #6 intake, the hoses like to split at the ends. Also look for brownish stains around the base of the intakes, the o-rings like to leak. You can check the exhaust, but 7ft/lbs ONLY!!!! these break VERY easily!!!! Have you made any changes lately? Whats the last thing you did to her before she started acting up?
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Yea though I ride through the valley of the Shadow of Death I shall fear no evil. For I ride the Baddest Mother F$#^er In that valley!
99 STD (Under construction)
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Mo Lee
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« Reply #4 on: September 20, 2011, 06:06:42 PM » |
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Thanks for the quick responses, Bone I will check on that I don't want a hydrolock, when I read your reply I remembered seeing a vacumn hose routing and it appears #6 is where it gets it from so I suspect you are on to something. Normally popping comes with lean conditions however with #6 being fouled a couple of weeks ago it probably is a rich condition.
Sandy my 03 does run better on regular however this bike runs open cobras and the dealer when I bought it said it had a trigger wheel and rejetting done to it. It runs fair on regular but a whole lot better on premium fuel.
YoungPUP no recent changes and I probably should change all lines and hoses.
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The Anvil
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« Reply #5 on: September 20, 2011, 06:51:09 PM » |
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Unless you've modified the bike, it only requires regular fuel. You're wasting your $$$ on premium.
First of all, that wasn't the question. More importantly, people need to stop telling people this as a given. Around here premium fuel is 100% gasoline at least during the during the summer months, no ethanol. Some bikes, depending on configuration, prefer 100% gasoline to 10% ethanol blends. If he says his bike likes premium better then it may very well run better on it. |
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Boxer rebellion, the Holy Child. They all pay their rent.
But none together can testify to the rhythm of a road well bent.
Saddles and zip codes, passports and gates, the Jones' keep.
In August the water is trickling, in April it's furious deep.
1997 Valk Standard, Red and White.
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Dirty Dave
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« Reply #6 on: September 20, 2011, 07:25:43 PM » |
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Isn't the rule of thumb to only increase octane if she pings under hard acceleration?  |
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97BLKVALK
Member
Posts: 637
VRCC#26021
Detroit Lakes, MN
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« Reply #7 on: September 20, 2011, 08:21:09 PM » |
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Mo Lee,  for getting the Fat Lady on the road again. A couple things I can think of, The intake "o" rings maybe leaking also check where the air box connects to the intake. There are 2 hose clamps: one clamping onto the airbox and one to the intake. Check with "Redeye Tech" all things Valk and great quality. http://redeye.ecrater.com/Michael |
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All that is necessary for the triumph of evil is that good men do nothing.
1997 GL1500C - Black
1997 GL1500C - Purple
1997 GL1500C - Bumble Bee
1998 GL1500C - Blue and Cream
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rodeo1
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« Reply #8 on: September 20, 2011, 08:48:40 PM » |
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Isn't the rule of thumb to only increase octane if she pings under hard acceleration? thats a fact, altitude dictates a lot too. they sell 85 octain here in colo as reg. it runs fine in my valk, sea level reg. is always 87 octaine, runs fine, and guys lower octain burns hotter and keeps your plugs cleaner, your compression ain't high enough and detonation is not much of a problem with aluminum heads. premium is a major waste of your hard earned cash. read your manual 87 octaine only is what honda says. 91 octain premium is needed for 10:1 engines, but not in this aplication. |
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John U.
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« Reply #9 on: September 20, 2011, 09:12:16 PM » |
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Isn't the rule of thumb to only increase octane if she pings under hard acceleration? thats a fact, altitude dictates a lot too. they sell 85 octain here in colo as reg. it runs fine in my valk, sea level reg. is always 87 octaine, runs fine, and guys lower octain burns hotter and keeps your plugs cleaner, your compression ain't high enough and detonation is not much of a problem with aluminum heads. premium is a major waste of your hard earned cash. read your manual 87 octaine only is what honda says. 91 octain premium is needed for 10:1 engines, but not in this aplication. All you've said is generally true but the trigger wheel can change the bike's requirements. I am running the ECT mod and I find it runs smoother with mid-grade. Not all detonation is audible, especially with a loud exhaust or wind noise. If you're running a trigger wheel I think it's good insurance to run at least mid-grade. |
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The Anvil
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« Reply #10 on: September 21, 2011, 05:59:32 AM » |
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Isn't the rule of thumb to only increase octane if she pings under hard acceleration? Rules of thumb are exactly that; general rules that may not always apply depending on circumstances. Engine configuration, modifications, ethanol content, altitude, ambient temperature all can have an effect on how well a fuel burns in a given engine. |
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Boxer rebellion, the Holy Child. They all pay their rent.
But none together can testify to the rhythm of a road well bent.
Saddles and zip codes, passports and gates, the Jones' keep.
In August the water is trickling, in April it's furious deep.
1997 Valk Standard, Red and White.
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Hoser
Member
Posts: 5844
child of the sixties VRCC 17899
Auburn, Kansas
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« Reply #11 on: September 21, 2011, 11:00:51 AM » |
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As a travel tip(nobody ever stops here) If alcohol is present in gas sold in Kansas, it is posted as such on the pump. It is a Kansas state statute, big fine if it isn't posted. I personally don't mind using ethanol, but I know some don't like it. Hoser
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I don't want a pickle, just wanna ride my motor sickle  [img width=300 height=233]http://i617.photobucket.com/albums/ |
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rodeo1
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« Reply #12 on: September 21, 2011, 12:34:12 PM » |
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As a travel tip(nobody ever stops here) If alcohol is present in gas sold in Kansas, it is posted as such on the pump. It is a Kansas state statute, big fine if it isn't posted. I personally don't mind using ethanol, but I know some don't like it. Hoser
yeah, colorad too, mine runs fine on 10% alcohol, we better learn to live with it, looks like a permanent fixture. and hey, anvil. if your mother told you she was there the day you were born -- would you argue with her ?  |
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Mo Lee
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« Reply #13 on: September 21, 2011, 03:53:14 PM » |
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Pulled the Vac line off number 6 intake and it looks like more than air has been going thru the hose. Stopped at dealer on the way home from work and ordered petcock rebuild kit. This may not turn out to be the problem however I will have piece of mind knowing it is done and I was meaning to do it anyway.
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Bone
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« Reply #14 on: September 21, 2011, 04:59:30 PM » |
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The rebuild is easy. If you are doing it yourself don't hesitate to ask questions if needed. Mine is still manual with no problems so far.
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sugerbear
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« Reply #15 on: September 21, 2011, 06:14:01 PM » |
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Pulled the Vac line off number 6 intake and it looks like more than air has been going thru the hose. Stopped at dealer on the way home from work and ordered petcock rebuild kit. This may not turn out to be the problem however I will have piece of mind knowing it is done and I was meaning to do it anyway.
if that doesn't fix it let me know. will try to find a weekend free. bring it up and we'll(my buddy and i) will try to help. |
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Mo Lee
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« Reply #16 on: September 23, 2011, 03:02:50 AM » |
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Update, it will be next week before the rebuild kit comes in however yesterday I took sick leave and went ahead and pulled the petcock apart. The vac diaphram had a half inch hole in and there was oily residue behind the fuel diaphram. I guess the bike has really good vac that was able to open the diaphram even with the open vent between the two diaphrams. Sounds like the bike was telling me "hey stupid fix this petcock before I self destruct". Thanks again for all the great advice.
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Jess Tolbirt
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« Reply #17 on: September 23, 2011, 05:57:32 AM » |
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sometimes if you get gas with more lubrication than really needed it will separate in the pet rooster,,,
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Farther
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« Reply #18 on: September 23, 2011, 10:46:33 AM » |
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sometimes if you get gas with more lubrication than really needed it will separate in the pet rooster,,,
How did you determine this? |
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Thanks,
~Farther
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rodeo1
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« Reply #19 on: September 25, 2011, 11:21:07 AM » |
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sometimes if you get gas with more lubrication than really needed it will separate in the pet rooster,,,
HUH ? |
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John U.
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« Reply #20 on: September 25, 2011, 03:08:22 PM » |
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We are talking about 4 stroke engines, right?
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