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Post by JR on Nov 12, 2012 22:19:46 GMT -6
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Post by justbuggin2 on Nov 12, 2012 23:37:15 GMT -6
first contestant has bad ground cable to the motor and the cables from the battery need to be replace with a heaver gage cable to carry the current i had a seemilar problem with blue
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Post by alleyoop on Nov 12, 2012 23:54:00 GMT -6
The Fifth contestant I have already diagnosed and solved his problem. If it shudders at low rpms starting off it is because his CLUTCH pads are slipping on the bell and or the Pads are binding and require higher rpms. He has already proved that point after I told him to lube the swivel parts of the clutch pads so that no binding would occur and will then require less rpms to be thrown out with enough centrifugal force to grab the bell good. One doctoring up of the arms lasted him I believe he said 2 weeks then the shuddering returned. The more permanent fix for the arms pads to be able to handle very low rpms is weaker springs.
Alleyoop
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Post by wolfhound on Nov 13, 2012 6:13:15 GMT -6
Re: Allyoops diagnosis for the shuddering. Thank you. My TGB D150 has a slight 'stutter' in the rear end when first taking off but immediately
smooths out and runs fine. We have already diagnosed as the clutch and with 8000 miles on it will just replace it as soon. Right now I have
to pull the gas tank to determine why it leaks out a half tank when filled up and then stops. Not enough time to work on it right now and am
riding the Stella to break it in.
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Post by JR on Nov 13, 2012 8:30:11 GMT -6
Sorry guys, just don't think it's the clutch. Not going to read that 7 page book again but if I remember he's replaced the clutch and same old same old. I've got two linhais, both together have nearly 20k, with OEM cluctches, no shuddering, and no greasing the joints etc. Only thing that's ever been done is clean them out with air hose, grease the internal roller bearings and on my 250B I added boric acid one time because the pads glazed a bit and were squeeling.
If you google the 250 linhai scooters you'll almost find this problem exclusive to them, occasionally will see it happen on other scooters. My Bali with 8k has never done this even with what I think is the problem with his scooter.
The spring set up on the 250 linhai clutch is right on, replacing the springs main and pad ones is a waste of time.
If you read the entire post again you'll see one thing that stands out that he has not addressed. There is one more thing other than that one thing that can cause this, it happened to me and I like to have went nuts before I found it.
BTW Alley it's not low RPM, the linahi idles at about 1800 RPM and the clutch does not engage until about 2400 RPM. All I have dealt with come with 14 gram rollers OEM and the final gears are of a mid to high range, that's why I dropped my variator weight to 12g with sliders.
JR
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Post by JR on Nov 13, 2012 8:38:14 GMT -6
first contestant has bad ground cable to the motor and the cables from the battery need to be replace with a heaver gage cable to carry the current i had a seemilar problem with blue Some of the trouble for sure but she has never been able to keep a charged battery and if the sparks just flew when she crossed the solenoid relay then there's more to her problem than this? JR |
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Post by JR on Nov 13, 2012 8:39:51 GMT -6
BTW what is this drink, seriously? |
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Post by justbuggin2 on Nov 13, 2012 8:54:52 GMT -6
Fifth contesatant:
it can also be caused by a glazed belt
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Post by tvnacman on Nov 13, 2012 9:45:04 GMT -6
Up early this morning JR?
John
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Post by wolfhound on Nov 13, 2012 11:04:14 GMT -6
The drink is known as a side car
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Post by JR on Nov 13, 2012 11:18:54 GMT -6
Fifth contesatant: it can also be caused by a glazed belt Yes it can and with the linhai a belt worn to it's limit. I've ran very worn and stretched belts on my Bali and it had no effect other than to me I actually gain a tad of top end, but at around 6k on my 250B the belt was worn to about 22.6mm wide and it would shudder like this on very hot days. Also only on take off. New belt and it's never done it again with one exception and I'll let you think on that one for a spell. I kept the belt for a spare when on a long trip in case I had a break down. JR |
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Post by alleyoop on Nov 13, 2012 16:59:29 GMT -6
So for those that disagree PLEASE go and help the guy and POST and tell him it is NOT his CLUTCH and that the problem is caused by his belt. After all we are here to help fix scoot problems if we believe something is causeing the problem. I for one disagree his belt is causeing the shuddering so I will stick to my diagnosies.
Alleyoop
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Post by JR on Nov 13, 2012 18:43:23 GMT -6
I last posted back in mid-September. @ that time I thought that, WITH YOUR HELP, and that of Ben Butin, I had found what was causing my "SHUDDERING" PROBLEM.
I contacted Goldenvale and after a bit of back and forth, they sent me an entire new "Clutch Driven Assembly". If you remember, when we first tried to solve this problem, you suggested that I try lubricating the 3 clutch shoes pivot points in the Clutch Assy. When I lubricated the pivot points/pins/studs, the shaking, or shuddering would go away for several days and my scooter would take off as smooth as silk. I also had troubles riding at a slow seep, say thru a parking lot . Lubricating those pivot points solved BOTH of those problems.
My scooter would take off every time, run at very slow speeds, extremely smooooth.
That would last for about 10-14 days, or until the lubrication wore off.He also replaced the variator and has sanded the pads, bell, lubbed it how many times? All this time no one has asked the question of have you checked the belt? BTW lighter springs do not exist for the 250B clutch and this clutch comes in 3 different OD sizes and is not standard Chinese but made by Diamo, got one sitting on the floor right by my desk that I bought thinking the same thing until I found this:  The centerstand bottom rubber bushing the way this scooter is made when hinged back rubs right against back part of the engine crankcase and when you take off (if the bushing is gone) it makes it do everything from vibrate to make noise. Only time it does it is on take off or verry slow speeds. I went through both things, shudder with a worn belt and the bushing thing, would have sworn it was the clutch and got a thorough education on what fits what on the linhai, brands of clutches, and looking for springs parts etc and again I've got a brand new, don't need clutch at my foot steps. Also remember a lot of these 250's were bought and still being bought new as 07 and 08 models sitting in a crate for a long time, belts just like rubber get stiff and don't perform as well. While I would never rule out anything or suggestion in this case this man came on a thread started posting with his problems in Sept. and again has replaced it all except the belt. This is a very heavy duty clutch and I'm betting if I sent it to him he would have the same problem. There comes a time when like in all things if logical things don't work you do something even if it's wrong as they say. JR
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Post by alleyoop on Nov 13, 2012 20:43:22 GMT -6
Point made right here proof in the pudding: Would lubricating the CLUTCH stop this for 10-14 days??? If so I would sure love to hear this story:   The centerstand bottom rubber bushing the way this scooter is made when hinged back rubs right against back part of the engine crankcase and when you take off (if the bushing is gone) it makes it do everything from vibrate to make noise. Only time it does it is on take off or verry slow speeds. I think it is time to eat a little cake JR If your so positive I am wrong DON'T TELL ME? Tell the guy with the problem. If you want I can tell him to come here so you can tell him what and how to fix his problem. ;D   Alleyoop |
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Post by JR on Nov 13, 2012 21:44:01 GMT -6
Point made right here proof in the pudding: Would lubricating the CLUTCH stop this for 10-14 days??? If so I would sure love to hear this story: The centerstand bottom rubber bushing the way this scooter is made when hinged back rubs right against back part of the engine crankcase and when you take off (if the bushing is gone) it makes it do everything from vibrate to make noise. Only time it does it is on take off or very slow speeds. I think it is time to eat a little cake JR If your so positive I am wrong DON'T TELL ME? Tell the guy with the problem. If you want I can tell him to come here so you can tell him what and how to fix his problem. ;D Alleyoop Alley show me one clutch that has lubricated pins on the pads? Again I've got a brand new one sitting at my feet for a 250 linhai, ONLY lubrication is the center shaft and roller bearings on each end, not guessing here. I don't belong to that forum, he's not posting now, maybe a member there can put this jeopady thread up there for him to see and let him decide for himself, again it's still messed up, no proof of anything in any pudding to me? As far as his being OK until the lube wore off in 10-14 days = wishfull thinking IMO and if lubricating them alone was the answer then a good quality grease would not wear out in 10-14 days. The movement oif the clutch pads is extremely nominal as the gap between them and the clutch bell is very small. And as far as the rubber bushing being gone, again been there, ask him to take 10 seconds to look, doesn't hurt to see. Again he's replaced the variator, replaced the clutch but he's still there asking for help, still with the same problem and just ate a piece of mama's spice cake! ;D  Tell him if he want's to try another clutch I've got this one that I bought in Dec. 09 when I had the same trouble and found out it was the bushing under the centerstand causing all the vibration and about 6 months later it started again and replacing the belt cured that problem too. In fact if he'll pay the shipping I'll give it to him. JR |
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..BAD TO THE BONE..
