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Post by sai on Jul 29, 2015 21:13:35 GMT -5
At this point we need to know the numbers again with that o-ring in there. That'll tell us what we need to know... What it the squish clearance now? What is the compression now? Niz, do I really need to X-hatch all malossi cylinders that's fresh? I was told by moped medic to not do it because it's pre X-hatched already and I'll be removing material if I do so?
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Post by niz76 on Jul 29, 2015 22:02:48 GMT -5
He's correct. All cylinders come new with fresh crosshatching. We only do it when the cylinder gets old and used and needs a "freshening up."
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Post by sai on Aug 7, 2015 19:58:36 GMT -5
Is it possible for a crank to be slightly deformed and ever so slightly little by little makes it that the piston and rings shave the cylinder wall causing Loss of compression and power?
Just to remind you, when I replaced the piston rings on my ac bbk it went bad 1 week later.
Now that I switched to an lc bbk, I thought that the performance will be much more stable, but It feels like it's doing the same thing.
Ie: so I switched the bike on, 0-40mph, no problem, but when I slow down then try to accelerate again, it bogs and refuses to do so. It feels like I'm stuck at 15mph forever.
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Post by 190mech on Aug 8, 2015 5:20:24 GMT -5
You are looking in the wrong place!Its gotta be in the CVT,likely a wear notch in the TD grooves which wont allow the TD pulley to close all the way,thus you are staying in 'high gear'..Another Torque Driver replacing yours for a test would be the quickest way of finding out..Dont know much about Kymco CVT parts,will other brands swap over??
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Post by sai on Aug 8, 2015 9:31:40 GMT -5
I was taking some photos for 190mech this morning and I noticed that the exhaust mouth didn't seal completely with the exhaust cylinder port... I see some black goo oozing out of it a little.
I hope this is the cause of loss of power and acceleration I mentioned above.
Gonna put thermal copper on it
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Post by sai on Aug 8, 2015 13:43:40 GMT -5
Ok, so it wasn't because of the leak. Fixed it and it's still losing power around 30mph and refuses to go faster. This was on a slight uphill.
Straight line would be better and I can still reach 45mph, but I feel like I'm still missing some 'oomph'
Any suggestions on this?
Ps: gonna open the cvt and check on the variator boss... That thing has been full of gunk that it sticks to the variator plate.
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Post by niz76 on Aug 8, 2015 15:09:08 GMT -5
A good place to start might be to do "the marker test." Mark the variator with a marker and then go for a WOT test ride and see how much of the marker the belt wore away. This way you can see how far out on the vari the belt is travelling...
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Deleted
Deleted Member
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Post by Deleted on Aug 8, 2015 15:18:41 GMT -5
A good place to start might be to do "the marker test." Mark the variator with a marker and then go for a WOT test ride and see how much of the marker the belt wore away. This way you can see how far out on the vari the belt is travelling... That is such a brilliant and simple idea! I am going to write that one down for future reference. Excellent. Thanks, Bill
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Post by sai on Aug 8, 2015 16:11:47 GMT -5
i found the culprit! that variator boss was so hung up with something black not even sure what it is or where from i had to scrub it and the inner side of the plate with scotch brite to make it be able to move up and down. ! do you guys know where this come from??
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Post by niz76 on Aug 8, 2015 16:21:20 GMT -5
Good job glad u found it! If it's rust well that happens. If it's kinda gooey I believe it's from the 'oil impregnated self oiling bushing'...
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Post by sai on Aug 8, 2015 16:32:53 GMT -5
I don't think it's oil, it looks like black dust. It's very solid and rigid.
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Post by niz76 on Aug 8, 2015 16:43:35 GMT -5
Not really sure how to avoid it in the future. Did it fix your problem? Is your scoot running better now? I would imagine it'd really mess up your "gearing" if the variator couldn't slide open and closed properly.
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Post by sai on Aug 8, 2015 16:45:18 GMT -5
Not really sure how to avoid it in the future. Did it fix your problem? Is your scoot running better now? I would imagine it'd really mess up your "gearing" if the variator couldn't slide open and closed properly. Li only drove it for 1 block and I can already feel the power and acceleration come back with a vengeance.
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Post by 190mech on Aug 8, 2015 17:37:07 GMT -5
Belt Dust!Gotta keep all that CVT stuff clean..Brent has posted mannny links on CVT maintenance!
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Post by sai on Aug 8, 2015 19:34:33 GMT -5
I cleaned the majority up.
I was hoping that with everything clean and upgraded Id have no trouble with hills and wind. But these 2 easily killed 10-15mph off my top speed.
I'm carrying a bag of about 15-20lbs, but this shouldn't be so drastic ... Should it?
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