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Post by geh3333 on Sept 6, 2014 0:20:27 GMT -5
Have you checked the valves ? The exhaust valve may be to tight Then again if the valves are tight I would expect you'd have problems at not just full throttle . But it's worth checking if u haven't already . |
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Post by jjoshua20213 on Sept 6, 2014 7:15:37 GMT -5
I adjusted them after the problem started, and always do the exhaust .001 wider than intake because it always closes up faster.
The other day I was tuning and swapped out the carb for another then swapped back and when I went it start it it had no compression. I can hear the engine spinning freely. I assumed it was the valves. Checked them and they were both over .006 didn't fully measure, but anyways...
What cause both valved to suddenly open?
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Post by rockynv on Sept 6, 2014 8:56:31 GMT -5
I really don't know to say it any plainer.The diaphragm gets sucked in. Not falls back into place.Sucked in, like I see the rubber creator into the carb for a split sec, then rise back to its normal shape. I've tries 3 other diaphragms, same thing. I just bought another carb, I'll test and reply back Is that with the top cover removed that you are viewing this? When you open the throttle until vacuum stabilizes and rpm picks up the the slide is supposed to get pushed down by the spring in the cover until there is enough vacuum being applied above to pull it back up against the spring. With the top cover removed it is just going to get sucked right down. It is supposed to maintain an equilibrium of sorts based on engine load and airflow through the intake. |
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Post by rockynv on Sept 6, 2014 8:58:28 GMT -5
I adjusted them after the problem started, and always do the exhaust .001 wider than intake because it always closes up faster. The other day I was tuning and swapped out the carb for another then swapped back and when I went it start it it had no compression. I can hear the engine spinning freely. I assumed it was the valves. Checked them and they were both over .006 didn't fully measure, but anyways... What cause both valved to suddenly open? Only reason I know is sticky valve stems or hung rockers possibly due to a soft seize or the stems being bent. Points back to a potential carburetion issue and running lean. Any possibility that the modded cams lift is high enough to have had them hit the piston top when they were sticking? |
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Post by alleyoop on Sept 6, 2014 10:06:04 GMT -5
Could also be weak springs and at high rpms they are floating.
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Post by jjoshua20213 on Sept 6, 2014 12:53:38 GMT -5
So on my way to work today my belt went. (Not surprised)
My clutch is stuck in the closed position and will not open. The variator looked as if the sliders came out of place and broke stuff. lol I guess that happened when it went out.
Told you it was my clutch. Or at least the was part of the problem.
I have spare clutches and variators so thats not an issue.
I threw on a on old worn belt and it revs smoother, but still has that point where is sounds like gas is being restricted, just not as bad
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Post by tvnacman on Sept 6, 2014 13:11:35 GMT -5
break down the clutch get out all the chinese grease clean it up real nice , lube all the pivot points regrease the bearngs , sand the bell and pads remove the glaze. Take the hour on the clutch it will be time well spent .
John
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Post by rockynv on Sept 6, 2014 14:20:20 GMT -5
You have a pretty messed up bike there with so many problems it is hard to pinpoint just one. Your clutch being stuck now could just be from the bits of failed belt stuck in it however the clutch was not the root cause of your carburetion problem or your sticky valve issue.
I will still hold to my feeling that if you want 250cc performance it is cheaper and you end up with a more reliable bike in the long run by simply purchasing a 250cc bike and resist the urge to tinker.
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Post by jjoshua20213 on Sept 6, 2014 21:35:30 GMT -5
break down the clutch get out all the chinese grease clean it up real nice , lube all the pivot points regrease the bearngs , sand the bell and pads remove the glaze. Take the hour on the clutch it will be time well spent . John c The pads on the stuck clutch are new, i'm just going to switch them with a different clutch. |
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Post by jjoshua20213 on Sept 6, 2014 21:51:50 GMT -5
You have a pretty messed up bike there with so many problems it is hard to pinpoint just one. Your clutch being stuck now could just be from the bits of failed belt stuck in it however the clutch was not the root cause of your carburetion problem or your sticky valve issue. I will still hold to my feeling that if you want 250cc performance it is cheaper and you end up with a more reliable bike in the long run by simply purchasing a 250cc bike and resist the urge to tinker. Nah, just problems come in two's in my life.I knew I should have checked out the clutch I was just too lazy too. I bought a new cartb, i'm sure that will fix the problem. Theres nothing wrong with the engine because I just put it in, is so I have a spare. I would have gotten rid of it a long time ago but I just put new pirelli tires on it and it went 52mph and got there fast.I plan on getting another 50 and throwing my spare kit on it and just selling this one. |
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Post by bashan on Sept 6, 2014 22:29:22 GMT -5
I didn't read all of this but I'd like to throw out there it sounds like a bad main spring. It happened to me. Alley diagnosed it for me about two months ago. JMO, Rich
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Post by tvnacman on Sept 7, 2014 7:06:19 GMT -5
I didn't read all of this but I'd like to throw out there it sounds like a bad main spring. It happened to me. Alley diagnosed it for me about two months ago. JMO, Rich When you break down the clutch you can check the main spring , you also want to squeeze the pulley opened and make sure it slides and rotates opened closed smoothly . You also want to make sure the clutch pads move out smoothly also . John |
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Post by geh3333 on Sept 9, 2014 2:46:09 GMT -5
Your right to just buy a new clutch or use a spare u may have " why take the chance ". I figured you had a cvt issue also . Hope you get it going .
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Post by geh3333 on Sept 9, 2014 2:55:47 GMT -5
If from idle you open the throttle it should rev right up and SHOULD not loose any rpms, if it does your setup is wrong. Your problem has nothing to do with your clutch and that already has been mentioned by Rockynv someone who knows how the cvt works. Alleyoop Yes there was a clutch problem ,, it's imposible to say that it had nothing to do with the clutch when we are sitting miles away . We need to be more open to other causes to get the problems solved more efficiently. |
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Post by alleyoop on Sept 9, 2014 16:32:47 GMT -5
If from idle you open the throttle it should rev right up and SHOULD not loose any rpms, if it does your setup is wrong. Your problem has nothing to do with your clutch and that already has been mentioned by Rockynv someone who knows how the cvt works. Alleyoop Yes there was a clutch problem ,, it's imposible to say that it had nothing to do with the clutch when we are sitting miles away . We need to be more open to other causes to get the problems solved more efficiently. He said his diaphgram was folding down so all we can do is go by what the people say and have them check out that part of the system. I still do not believe it was his clutch to cause his problems but I will leave it at that. If he is a happy camper that is all that matters. Alleyoop |
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..BAD TO THE BONE..
