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Post by highvoltagehotrods on Oct 30, 2013 16:42:23 GMT -6
After letting my baby sit too long my carbs were completely gummed up. I took them off, stripped them, and soaked them and did a complete rebuild of both carbs. The bike now starts right up and idles great but as soon as I apply throttle is sputters and bogs down. I have taken off and gone over the carbs carefully and everything looks clean and in place. It seems like its running too rich when it moves out of idle. I don't see any way to adjust this. Does anyone have any idea of what might be causing this or where I should be looking? Is there something beyond the carbs that could cause this? Thanks.
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Post by highvoltagehotrods on Oct 30, 2013 19:09:20 GMT -6
After doing some reading, I am wondering if this is the problem and would be grateful if someone could confirm this. I have been testing the bike without the air cleaner on because its such a pain in the Donkey to take the carbs on and off with the air box in place. I am going to try to replace it with something like the Emgo 54mm filters.
Would having these filters off cause the heavy bogging down of the engine when the throttle is opened? Could it be that simple?
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Post by Blaine on Oct 30, 2013 20:26:07 GMT -6
After doing some reading, I am wondering if this is the problem and would be grateful if someone could confirm this. I have been testing the bike without the air cleaner on because its such a pain in the Donkey to take the carbs on and off with the air box in place. I am going to try to replace it with something like the Emgo 54mm filters. Would having these filters off cause the heavy bogging down of the engine when the throttle is opened? Could it be that simple? Yep.These engines will bog & not rev with the filter box off.Even with pods it takes tweaking to get them right.This is your problem.   |
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Post by randyc on May 9, 2014 15:06:59 GMT -6
What needs to be done to make it run right? I am having the same issue. I have some cone air cleaners on it but still doesn't like the mid range running.  Sent from my iPhone using Tapatalk |
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Post by Blaine on May 9, 2014 20:10:44 GMT -6
What needs to be done to make it run right? I am having the same issue. I have some cone air cleaners on it but still doesn't like the mid range running. Sent from my iPhone using Tapatalk You need to shim your needles & cut a couple of coils off the diapram spring.Idle to 1/3 throttle is controlled bu the pilot jet,mid-range 1/3 to 3/4 is controlled by needle jet & 3/4 to full throttle is controlled by Main jet. |
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Post by randyc on May 9, 2014 22:50:56 GMT -6
Ok. Sounds like I will stick with stock airbox. Little more than I think I can do without messing things up. Tx for the reply though  ? Sent from my iPhone using Tapatalk |
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Post by Blaine on May 10, 2014 6:17:53 GMT -6
Ok. Sounds like I will stick with stock airbox. Little more than I think I can do without messing things up. Tx for the reply though ? Sent from my iPhone using Tapatalk No problem.It can take some time & effort to get them right after adding pods. |
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Post by randyc on May 31, 2014 9:57:23 GMT -6
I am at a loss Blaine. For the life of me I can't get my bike running right. My pilot jet is a 35, Main from 125 to 130, cut 1 coil up to 3 coils now,have another set so can go back to stock if needed, shimmed needle with 1, 3mm washer then 2 and seemed better. Bike seems to go through all stages fine when sitting on stand. Go out to ride and starts out fine then lose midrange again. I do have the cone 54mm filters but thought I had it right with mods to jets but no luck. Should I get a bigger mainjet maybe? Its too nice not to be able to ride.
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Post by Blaine on May 31, 2014 14:54:29 GMT -6
I would shim the needle with one more & try it.Some people need to use 3 washers.Remember the needle controls mid-range.The main jet controls 3/4 to wide open. |
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Post by randyc on May 31, 2014 15:19:07 GMT -6
Well after more inspection, I found 1 of the slides was not sliding smooth. Replaced that. Went down the street and seemed good. Went a couple miles down the hiway and it started acting like it was starving for fuel. The float levels are pretty high so don't think its that. I know my brother in law drilled out my pilot a little bigger than it should be. Starts great but idle bogs after a minute or 2. So that must be too big now. I have a kit coming that should take care of any wrong size jets. www.ebay.com/itm/331199184490?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 I will keep you all posted on this. Its driving me crazy.
I have an inline filter. Could that be limiting my fuel maybe, Blaine? |
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Post by Blaine on May 31, 2014 17:37:50 GMT -6
Well after more inspection, I found 1 of the slides was not sliding smooth. Replaced that. Went down the street and seemed good. Went a couple miles down the hiway and it started acting like it was starving for fuel. The float levels are pretty high so don't think its that. I know my brother in law drilled out my pilot a little bigger than it should be. Starts great but idle bogs after a minute or 2. So that must be too big now. I have a kit coming that should take care of any wrong size jets. www.ebay.com/itm/331199184490?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 I will keep you all posted on this. Its driving me crazy.
I have an inline filter. Could that be limiting my fuel maybe, Blaine? I can't imagine as long as it's clean. I had this on mine.  |
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Post by randyc on May 31, 2014 19:18:06 GMT -6
Looks like mine
Guess I am waiting for the kit I ordered. Hope it works cause I am so ready to pull my hair out. Wait, I don't have any hair lol |
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Post by kawa85 on Jun 24, 2014 23:15:04 GMT -6
I am having the same problem. Idles just fine but dies as soon as I give it throttle. I adjusted the valves first, cleaned the carbs thoroughly, all jets cleaned and reinstalled (all carb parts looked good so I did not replace any), checked the float bowl heights, they are within spec, stock airbox (no air filter mods), air valve (sat on top of valve cover)removed and vacuum/air ports capped off (R side carb vacuum plugged, L side carb goes to petcock--3" hose runs straight up to petcock), fresh fuel in tank. I hear about shimming needles, cutting off spring coils. Does anyone have a Troubleshooter for carbs? I don't think the book says much in detail about carb trouble. What to do next?  |
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Post by kawa85 on Jun 28, 2014 13:14:46 GMT -6
I haven't synced my carbs with my home-made manometer yet. Could that be why it dies when I give it throttle? Idles just fine.
Sent from mobile using proboards app
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Post by kawa85 on Jun 29, 2014 16:14:11 GMT -6
Can I do the vacuum sync if the engine stalls when I give it gas? Please help. I'm ready to call it quits and sell this bike.
Is there anybody oooooouuuuut there?
Sent from mobile using proboards app
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Post by Blaine on Jun 29, 2014 20:45:44 GMT -6
I don't understand why people are saying to cut off pieces of the diapram spring coil, altering the original parts that a group of Japanese engineers designed specifically for this bike. They designed all these parts the way they are for a reason. Any adjustments should be done so that they don't involve altering the original parts (i.e. turning the air mixture screw in/out). But then after ripping my hair out trying everything I can imagine to get this bike to run right I see why people go to these extremes. I am now messing with the air mixture screws. 1.5 turns out seems to work best. 2 turns out and she stalls after a few seconds. On a side not, I swear that the fuel filter is blocking fuel flow. Just as the engine is about to stall I turn the petcock to PRI and let some fuel into the carbs and sire enough it comes back to life. I am trying to get the bike to stop stalling so I can perform the vacuum sync. I found a way to do it without removing the gas tank. This is my last attempt. I'm at my wit's end with this bike. I am never attempting carbs again. Sent from mobile usinghng proboards app The coils are cut & carbs modified when you install pod filters,not with a stock set up.If your petcock is working properly you shouldn't need to swith to "pri" to get fuel flo. |
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Post by eaglerider on Jun 30, 2014 5:36:56 GMT -6
sounds to me like the petcock is not working right. It is vacumn controlled, and if the diaphram in the petcock is bad, it will not open properly, restricting/preventing proper fuel flow. If the bike runs like it should when you switch to PRI, this is an indication of what is wrong.
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