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 Author | Topic: High RPM slipping sensation (Read 382 times) |
doug08
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|  | High RPM slipping sensation
« Thread Started on Mar 16, 2012, 7:51pm » | |
No matter what I checked, I still get an intermittent slipping sensation at high/higher rpm's, and while maintaining rpm's downhill. Took apart and inspected the variator/rollers, and clutch assembly with ALL springs. Even swapping out the Large contra spring for one that is stiffer, made no difference. Is it possible that the slipping sensation is caused by the carb at high rpms? The engine sounds the same when it happens. I cannot figure it out. Changed the rollers, belt, and inspected the clutch pads(like new).
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gysixxer
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| | Re: High RPM slipping sensation
« Reply #1 on Mar 16, 2012, 10:55pm » | |
if the ur topped out...then yes it could be that ur carb is starving for gas....try cleaning the carb and jets...does it feel like its jerking when ur riding? or does it feel like its bogging?
also what about ur belt?
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wile
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| | Re: High RPM slipping sensation
« Reply #2 on Mar 16, 2012, 11:19pm » | |
Does it make a sound when this happens? Brup sound, Pop sound, Bog sound etc..
You have to try and identify the sound if it makes one because each sound points to a different solution.
Wile
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mopojo
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| | Re: High RPM slipping sensation
« Reply #3 on Mar 16, 2012, 11:21pm » | |
Mar 16, 2012, 10:55pm, gysixxer wrote:if the ur topped out...then yes it could be that ur carb is starving for gas....try cleaning the carb and jets...does it feel like its jerking when ur riding? or does it feel like its bogging?
also what about ur belt? |
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Mine does both. Especially uphills. Trying to figure out if there is in fact an air/fuel mixture screw under that brass cap before I start drilling.... 
It's a PD18J on a 2010 Peace Dash 50 1P39QMB; same bike that larry001964 has.
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wile
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| | Re: High RPM slipping sensation
« Reply #4 on Mar 16, 2012, 11:26pm » | |
Well so far 10 out of 10 that drilled theirs THERE is a screw behind the cap. If not you would need a new carb anyway so go for it you have nothing to loose.
Wile
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FROM THE BOOK OF KNOWLEDGE: THE THINGS YOU DO FOR YOURSELF ARE GONE WHEN YOU DIE, BUT THE THINGS YOU DO FOR OTHERS REMAIN AS YOUR LEGACY. |
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mopojo
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| | Re: High RPM slipping sensation
« Reply #5 on Mar 16, 2012, 11:27pm » | |
wrong forum... sorry
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EDIT @ wile
I should of mentioned that the carb sounds as if is "huffing" air. Thanks for the lookout on the carb. I wont invest any money on it and will look for a future replacement....
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"Peanut" 2010 Peace Dash 50 1P39QMB (Stock) 6,000 Miles 7/23/12 STOLEN missed |
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wile
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| | Re: High RPM slipping sensation
« Reply #6 on Mar 16, 2012, 11:40pm » | |
Don't need to look just drill the plug out and you will be able to adjust it. Just trying to save you some dough bro and get your carb adjusted right. It is running lean and you need more juice to pull you up the hill.
And most likely some lighter weights to keep your rpms up. You should not loose rpms going up a hill just your speed due to the weight being pulled.
Wile
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FROM THE BOOK OF KNOWLEDGE: THE THINGS YOU DO FOR YOURSELF ARE GONE WHEN YOU DIE, BUT THE THINGS YOU DO FOR OTHERS REMAIN AS YOUR LEGACY. |
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mopojo
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| | Re: High RPM slipping sensation
« Reply #7 on Mar 16, 2012, 11:58pm » | |
Word. 'Preciate it.
By the way; you ever catch that freakin' loud a** bleeping Roadrunner?
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"Peanut" 2010 Peace Dash 50 1P39QMB (Stock) 6,000 Miles 7/23/12 STOLEN missed |
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wile
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| | Re: High RPM slipping sensation
« Reply #8 on Mar 17, 2012, 12:05am » | |
Cool, yep I caught that bleeping sucker and had him for lunch just the other day, now I am after the rest of his family
Wile
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FROM THE BOOK OF KNOWLEDGE: THE THINGS YOU DO FOR YOURSELF ARE GONE WHEN YOU DIE, BUT THE THINGS YOU DO FOR OTHERS REMAIN AS YOUR LEGACY. |
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mainepeace
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| | Re: High RPM slipping sensation
« Reply #9 on Mar 17, 2012, 3:46am » | |
I don't wish to argue, but this is what you get when you drill the Peace Sports carbs from around July 2011 onwards.
Greg
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doug08
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| | Re: High RPM slipping sensation
« Reply #10 on Mar 17, 2012, 7:43am » | |
I cannot hear any sound change in the engine when the slipping occurs. When at high speeds cruising, I'll feel the scooter lose its forward momentum for between a split second to 1 sec max. Then it continues along as normal. Never happens uphill, only on a level surface, or maintaining speed downhill. I installed a new Japanese Walbro carb a few months back, it never happened before.
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mopojo
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| | Re: High RPM slipping sensation
« Reply #11 on Mar 17, 2012, 8:22am » | |
Mar 17, 2012, 3:46am, mainepeace wrote:I don't wish to argue, but this is what you get when you drill the Peace Sports carbs from around July 2011 onwards.
Greg |
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Hi, Greg.
This bike is stamped as Dec , 2010 on the vin-plate. I know the only way to tell if there is a mix screw is to drill, but does that date put put me at better odds on the positive side?
Thanks,
Breezy
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"Peanut" 2010 Peace Dash 50 1P39QMB (Stock) 6,000 Miles 7/23/12 STOLEN missed |
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mopojo
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| | Re: High RPM slipping sensation
« Reply #12 on Mar 17, 2012, 8:24am » | |
@ Doug08: I'm so sorry that I have hi-jacked your thread. Please forgive me, as I am a very impulsive individual.
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"Peanut" 2010 Peace Dash 50 1P39QMB (Stock) 6,000 Miles 7/23/12 STOLEN missed |
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mainepeace
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| | Re: High RPM slipping sensation
« Reply #13 on Mar 17, 2012, 12:54pm » | |
Last year I dealt mainly with Peace Sports and Tao Taos from 2010 and 2011. I did not drill any customers carbs, but helped at least 30 people last summer on SD.
The manufacture date of the scooter the carb in the photo was taken from was Dec 2010. I've had MOST from the summer of 2010 turn out fine but starting with scooters manufactured in October 2010 they started to have blank carbs. After July 2011 every scooter I got had a blank plug. I really can't say for yours.
You can tell by looking from the bottom inside the bowl. If you take the bowl off and look underneath, look at the area where you would imagine the screw to extend. You can BARELY see a spot in the middle of the carb, in line with the screw from the side, where a tiny BB like piece of brass is exposed. I don't have a photo. If you look at the casting and it is obvious that nothing is behind where the screw assembly is supposed to be then it's probably blank. You have to look really closely though.
Greg
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mopojo
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| | Re: High RPM slipping sensation
« Reply #14 on Mar 18, 2012, 5:36pm » | |
I noticed the brass "BBs" when I first cleaned the carb, but I didn't think to look for one inline with the A/F "screw". I'll check it out next time I tear it apart.
By the way; the "BB" will indicate a blocked passage (non-functional)?
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"Peanut" 2010 Peace Dash 50 1P39QMB (Stock) 6,000 Miles 7/23/12 STOLEN missed |
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mainepeace
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| | Re: High RPM slipping sensation
« Reply #15 on Mar 18, 2012, 5:55pm » | |
No, it just indicates there is some metal assembly installed behind it.
Greg
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mopojo
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| | Re: High RPM slipping sensation
« Reply #16 on Mar 18, 2012, 5:59pm » | |
Right, then....
Thanks
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"Peanut" 2010 Peace Dash 50 1P39QMB (Stock) 6,000 Miles 7/23/12 STOLEN missed |
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wile
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| | Re: High RPM slipping sensation
« Reply #17 on Mar 19, 2012, 4:40pm » | |
Well let me just say this, What difference does it make IF there is nothing behind the Plug. You people have to think a little bit how are you going to adjust the carb, don't forget they set them to run LEAN and in a different enviroment to boot. So if there is no screw YOUR SCREWED anyways and have to get an Aftermarket Carb that has the screw. So you really do not have anything to lose and maybe save yourself a few bucks and not have to buy a carb.
Can't believe a dealer knocking not to try and drill it out, I guess maybe to sell a carb who knows. Just remember he was wrong on the last one I told the guy on this forum to drill it out. He even said I guarantee there is no screw behind the plug and there was, got a little egg on his face on that one(But I did not say anything) . Now here he is again knocking to try and drill the plug, so don't believe everything you hear. Like I said before I have yet to hear from someone that has drilled the plug and not find a screw behind it and believe me there have been many here and other forums.
Doesn't take but a few minutes to find out If there is no screw behind it. The carb will not ruined and can always be plugged back up if you like with some JB.
Wile
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mopojo
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| | Re: High RPM slipping sensation
« Reply #18 on Mar 19, 2012, 6:00pm » | |
Ok, wile. I "chopped" the plug and it was tannish-gray.
Earlier I covered two holes on the air filter snorkel and the bike started acting up and hesitating at between 1/3 and 2/3 throttle. Ran fine when tape was removed. So it would appear that the air/fuel mixture is correct (or close).
I will drill the plug eventually (I just can't stand to have that blank staring back at me ).
EDIT: I also understand that if I somehow find Peanut running lean and if there is no A/F mixture screw, I can raise the needle to accomplish basically the same results.(?).
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wile
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| | Re: High RPM slipping sensation
« Reply #19 on Mar 19, 2012, 7:12pm » | |
The needle comes on around 20mph so it will not help starting idleing and getting up to speed. So good luck and may the gods be with you.
Wile
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FROM THE BOOK OF KNOWLEDGE: THE THINGS YOU DO FOR YOURSELF ARE GONE WHEN YOU DIE, BUT THE THINGS YOU DO FOR OTHERS REMAIN AS YOUR LEGACY. |
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mopojo
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| | Re: High RPM slipping sensation
« Reply #20 on Mar 19, 2012, 8:54pm » | |
I'll let the thread die. Thanks for the info on the needle action during accelleration. I just found some threads explaining said material. Sorry to bother you so....
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"Peanut" 2010 Peace Dash 50 1P39QMB (Stock) 6,000 Miles 7/23/12 STOLEN missed |
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wile
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| | Re: High RPM slipping sensation
« Reply #21 on Mar 21, 2012, 12:24pm » | |
No bother my friend just trying to help and possibley save you some dough no bad feelings here. All I can do is give you the poop and you can then decide what you want to do or not do with the info given.
Wile
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FROM THE BOOK OF KNOWLEDGE: THE THINGS YOU DO FOR YOURSELF ARE GONE WHEN YOU DIE, BUT THE THINGS YOU DO FOR OTHERS REMAIN AS YOUR LEGACY. |
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mainepeace
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| | Re: High RPM slipping sensation
« Reply #22 on Mar 22, 2012, 1:06am » | |
Mar 19, 2012, 4:40pm, wile wrote:He even said I guarantee there is no screw behind the plug and there was, got a little egg on his face on that one(But I did not say anything)
Wile |
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Well, the last 4 carb plugs that were drilled out (only weeks before Wile joined this board) ended up being blank after I advised that they probably were. So, in the past 2 months, 4 out of 5 really isn't a bad record. Not including the many months since I learned of the carb issue.
I have no issue with drilling them out. Go ahead and do it. I'm not stopping anyone. I'm just saying that if you have a scooter brought over to the US since the EPA made their ruling change in NOVEMBER 2010 then you will have a carb that does not have an A/F screw. If you do, you just happen to have a scooter that is either illegal or it is actually assembled before then. The law is the law.
What I have issue is the DEFINITIVE nature of the assumption that there ALWAYS IS an A/F screw.
Greg
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Blueboy5000
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| | Re: High RPM slipping sensation
« Reply #23 on Mar 24, 2012, 6:27am » | |
My 2011 Baccio MD-150T-6 has only slugs, and no a/f screw at all. We drilled off the aluminum cap, and all that was behind it was a brass slug, no screw, completely blank.
However, I have no indication of running lean. I did have a slight upper RPM lag. Turned out the problem was the EGR, it has a massive vacuum diaphragm, that when it activated under high rpms it starves the fuel regulator for vacuum, causing fuel starvation.
The solution was a larger 85micron lawnmower fuel filter. The bigger fuel filter holds more gas, so when the EGR kicks on and robs my fuel regulator, there's still gas in the filter and it doesn't go bone dry by the time the fuel regulator vacuums back up.
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