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Post by carasdad on Jun 15, 2013 7:35:48 GMT -5
Just got a 2012 Peace Sports B09 from a guy. All is stock except the 50mm BBK and #  main jet. Problem is when riding it..it only winds to about 5,500 rpm so it's not reaching top speed potential. However..on the stand it will rev to about 5,500...bog and pause a second or 2...they quickly zoom up to redline. I think that under a load the mid range bog keeps it from going higher..as the load won't allow it to rev higher. It has 7 gram weights...I have gone down as low as 5 gram to see if that would help it rev higher and not have that mid range bog. Nope..did no good..same rpm...just lower top speed. I tried a #  jet..but it was slobbering rich with the stock airbox on and off even. Wondering if it is a needle position issue? Needle is non adjustable..but can be raised with #4 washers...just can't be lowered due to the darn one piece needle design. Any input on what causes this mid range bog would be greatly appreciated. Thanks, Glenn... Btw..not been on in 4 days..a lil tornado took our tiny town out. no electric...water...shower...toilet etc for 4 days. I switched to Chippewa mode and lived like my ancestors...and fared well. However..the 3 ladies in the house were distraught and miserable..  |
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Post by domindart on Jun 15, 2013 7:57:23 GMT -5
Hope everybody feels better, sux to be in that situation  |
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Post by ramblinman on Jun 15, 2013 8:06:36 GMT -5
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Post by carasdad on Jun 15, 2013 8:16:12 GMT -5
Thanks...did try 5...6 and 7 gram. Still has a limited rpm range and speed. Also runs to 5,500 on centerstand...bogs and pauses a few seconds....then accelerates up to redline finally...no matter which weights rollers I use.. |
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Post by carasdad on Jun 15, 2013 21:02:31 GMT -5
[replyingto=carasdad]carasdad[/replyingto]No ideas or input? As I mentioned before...this is typical of anything I post...or reply to..nobody replies to a post I make..or after any comment I make on someone else's post...the thread ends there..no more comments. Sort of makes me feel like an outcast..but then...that is possibly what everyone wants. Sooo I shall find another forum..one where people are not segregated. Maybe it's my heritage..we Native Americans have been hated for about 300 years now..so we are used to it. It's kinda like High School Version Two..if yer not in the 'Click' or 'Kewl Club' on here...it is almost as if you don't exist.  Ok..I shouldn't laugh...cause sadly it is true....yup...  Have fun on here all..get tight with the 'Click' and 'Kewl Club' on here..and you will be acknowledged. Peace to all... Yayiima benatigee |
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Post by gatekeeper on Jun 16, 2013 5:16:42 GMT -5
Is the diaphragm in good shape?
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Post by scootnwinn on Jun 16, 2013 7:59:25 GMT -5
Glen come on you posted a mid range bog very hard to diagnose. Especially since many here aren't mechanics. Not only that I think you know how to go about fixing it. You need to plug chop when it bogs adjust your needle according to what the plugs says or you could just assume it's too lean and raise the needle and try it out. Hope you are well you and yours are in my prayers.
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Post by dude on Jun 16, 2013 10:58:58 GMT -5
Is the diaphragm in good shape? That would be my guess. Or make sure the cable is adjusted right throttle is opening properly |
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Post by ramblinman on Jun 16, 2013 12:03:51 GMT -5
well, i hope you get it figured out. my scoot has similar problem and i assumed i needed to change the weights, just haven't got around to doing it yet. but if it is something else that causes it then i hope to learn from your thread. so nope i got no more ideas or i would have responded to you earlier. |
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Post by carasdad on Jun 16, 2013 12:20:02 GMT -5
[replyingto=dude]dude[/replyingto]Diaphragm is intact..sealing well and working as slide goes all the way up when engine is revved. About 1/2 throttle it is all the way up. Cable is adjusted properly and gives throttle full range of travel. Tx for the input. @ Rob (scootnwinn) As always you are very insightful. Been a horrible week. Got this new scoot and can't get it to run right. Grew up on a farm and started working on smal to large engines at about 8 years old. So at 50...that comes to 42 years. Not to brag..but it is rare that an engine defeats me...and this one has. Add that to I rarely get comments on my posts..gets frustrating. Then a Tornado eats up my lil town like it was made outta Balsa wood..soo no electric for just over 4 days = no water...can't cook...no shower or bath..gotta use the woods a toilet since there is no water...and lots more. But it gets better..my Dr appointment was the day of the storm...so the office was closed. It was for a refill on my seizure meds..and now been 6 days without it..therefore about 2 seizures per day since then. That takes a lot out of you..believe me...exhausts your entire body and puts you in a state of depression. Can't drive for 6 months without one...which will be when I get my med refill. Even riding a scooter during that time is illegal...but I do as it is not a 4,000lb car where I risk the safety of others...it is a 200lb scoot and I risk my safety. Of all the laws the Police do enforce....they allow me to ride the scoot....just no car. Sure I could ride a bicycle or walk..but it is a pride thing to be denied the privilege to ride my scoot...and it eats away at you...making you feel alienated from the 'Normal' people. Anyway..enough about that. About the scoot...this is THE most anemic 50mm one I have ever ridden. He did mention something about a performance cam..but says he thinks he took it out. As you know not all cams labeled 'Performance' are for good top end like the A9 is. The A11 and A12 are low end torque cams..and since dealers never list what grind they are...you never know what you are getting since even the low end torque cams are labeled as 'Performance' cams. Therefore the only way I will know is to drop in a stock cam and see how it performs..then go from there. When folks here are running 9-11 gram weights in their 50mm scoots and I gotta run 5 gram ones just to reach 40mph...sumpin is up. Even then the rpms are barely up..and we all know a 50mm BBK with 5 grams should be WAY to light to the point the engine is screaming away. But nope...5 grams is still 5,500 rpms. Btw I opened the tranny last night and it has the stock longcase GY6 50 gearing of 11.05:1 Therefore it is not under geared keeping the speed down...not is it over geared to the point it puts a load on the engine..keeping speed down. So I am confused big time.  Glenn |
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Post by ramblinman on Jun 16, 2013 12:33:13 GMT -5
Therefore the only way I will know is to drop in a stock cam and see how it performs..then go from there. that is the problem with buying used imo. you have no idea what has been done to the engine. i have many new parts coming for mine so if it is a carb problem hopefully i get mine worked out. let us know how it performs if you put a stock cam in. |
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Post by carasdad on Jun 18, 2013 17:16:30 GMT -5
[replyingto=ramblinman]ramblinman[/replyingto]Ok..another look over and tear down...found out I was wrong. Did some research and learned quite a bit. The low speed and poor acceleration are caused by the gearing. It has shortcase gears in it..designed for the tiny 10" tires...but the engine is a long case with 12" high profile tires. Hence the reason it will not rev past 5,500rpm when riding it. The ratio puts too much load on the engine which does not have the power to handle it. It is geared too tall. Revs beyond redline on the stand though. I wondered why acceleration and revs were not only poor..but after you drive it stop and go a few blocks...the clutch slips on take off...gets super hot. When the clutch is slipping it will rev really high until the clutch grabs...then it drops rpm by about 2,500 and bogs its way slowly up to 40 or so taking a half mile to get there. This temporary high rev is not caused by the 1.5K clutch springs....if so it would rev that high all the time. Only time it does that is after several stop and goes...or when taking off on a small incline or in the grass. So I need to find the proper longcase gears to get the ratio down to where it was designed to be for the 12" high profile tires. Best way to describe the feel of the ride...is to start your car out in second or third gear...where you get that little bit of clutch slip as it tries to mush forward under a load. Silly me..I was told the gears were swapped...but I did not know shortcase gears were used....and the ratio was so tall it put the engine WAY out of the powerband.. As for the mid range bog on the stand..A/F screw adjustment and Main Jet Needle height adjustment cured that.. Now it's just a Turtle cause it is geared so steeply... |
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Post by hank on Jun 18, 2013 17:51:10 GMT -5
Hi Glenn
Glad you figured out the problem now its just the hunt for the proper gears
Will do all i can to aid you in your search
And do stick around i would miss you terribly if you left
Take care and ride safely dear friend
Yours Hank
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Post by shalomrider on Jun 18, 2013 17:57:24 GMT -5
howdy, is it possible or desirable to just switch out the 12" tire for a 10" and get the gearing back? or maybe go to a low profile tire or lose 200 pounds---now that's a funny not a comment of any particular.
lotsa miles and smiles to ya
ken
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Post by carasdad on Jun 18, 2013 19:31:08 GMT -5
howdy, is it possible or desirable to just switch out the 12" tire for a 10" and get the gearing back? or maybe go to a low profile tire or lose 200 pounds---now that's a funny not a comment of any particular. lotsa miles and smiles to ya ken Lmao...if I lost 200 lbs...I would weigh -60 I only weigh 140 or so lbs. @ hank appreciate it fellow military retiree...we gotta stick together ya know..I thought war was ...until I retired and poof I was in the Civilian world. Total culture shock...it's a jungle out there. I am used to men and women 'Having my back'...not back there looking for a place to bury a knife...  I gotta give the previous owner some credit..he knew shortcase gears would be an 'Up Gear'...he just didn't know it was above and beyond what the 50mm big bore kit could handle with the jumbo sized 12" tires vice the lil 10" ones. Many do however fail to consider tire size when gearing to a higher ratio. They don't realize its like having a Monster truck with 66" Terra Tires on it...being pulled by a Dodge Neon 2.2 liter engine and transmission... ...... ;D Maybe somebody here has a set of used stock longcase primary and secondaries they would sell me.  |
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main jet. Problem is when riding it..it only winds to about 5,500 rpm so it's not reaching top speed potential. However..on the stand it will rev to about 5,500...bog and pause a second or 2...they quickly zoom up to redline. I think that under a load the mid range bog keeps it from going higher..as the load won't allow it to rev higher. It has 7 gram weights...I have gone down as low as 5 gram to see if that would help it rev higher and not have that mid range bog. Nope..did no good..same rpm...just lower top speed. I tried a #
jet..but it was slobbering rich with the stock airbox on and off even. Wondering if it is a needle position issue? Needle is non adjustable..but can be raised with #4 washers...just can't be lowered due to the darn one piece needle design. Any input on what causes this mid range bog would be greatly appreciated. Thanks, Glenn...
