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Post by jerrycurl on Sept 6, 2008 9:32:52 GMT -5
The cvt belt broke on my 150cc scooter (chinese brand eagle 150gsr ), so I purchased a new belt. I put it on last night - but probably neglected a step. Now when I turn on the motor, the engine idles at 1000rpm, and when I increase the throttle, the rpm's don't increase much. On a flat surface the bike will go no more than 1 or 2mph, and I've noticed the variator seems to be stuck. Could the roller weights have slipped during the belt change? I didn't use a spacer. If that is the case, will I need to pull off the variator pully and reset the spacers? or could this be a bigger issue? I have owned the scooter for 2 months and am new at this. I noticed the rear pully seems to rock back and forth quickly when the engine is running, but doesn't spin like it should, keeping the rear wheel from turning.
HELP!!
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Post by harrywr2 on Sept 6, 2008 11:12:37 GMT -5
Does the rear wheel spin when on the center stand at idle?
If so
Depending on model...the clutch should engage between 1500 and 2500 RPM's. There are three springs in your clutch..as the rear pulley spins the centrifugal force overcomes the strength of the springs and the clutch engages. It would appear that your clutch is engaging at way too low an RPM. Broken belt bits caught up in the clutch could be a cause..or broken springs.
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Post by Jacine on Sept 6, 2008 12:07:13 GMT -5
In the new belt not catching the discs?. The teeth on the belt should be downwards.
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Post by leo on Sept 6, 2008 12:51:06 GMT -5
you say the rpm's don't increase much on twisting the throttle?
check the throttle cable at he grip and the carb.
are you sure you got the bolts in the holes they came out of?
there are a couple of places on my scoot that the bolts MUST go back into the hole they came out of, my calipers and my external oil line. so pay careful attention to the disassembly.
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Post by gy6rocket on Sept 6, 2008 12:58:15 GMT -5
Pull the CVT cover and start it. You will see exactly what is not working right.
I know I may get flamed but its a simple way to figure it out quickly.
Heed the Warning: IT CAN BE DANGEROUS, but if you are smarter then the scoot it will not get the best of you.
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Post by undertheradar on Sept 6, 2008 18:29:02 GMT -5
Pull the CVT cover and start it. You will see exactly what is not working right. I know I may get flamed but its a simple way to figure it out quickly. Heed the Warning: IT CAN BE DANGEROUS, but if you are smarter then the scoot it will not get the best of you. Pffft, most of the guys I ride with don't even use a cover.  Just keep your fingers away from it. The previous owner of my Gy6 tried to change the belt, and royally screwed the variator. Cracked rollers, gouged driven face, etc. Just make a variator holder tool and pull it off, reassemble and install. |
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Post by jerrycurl on Sept 7, 2008 7:08:42 GMT -5
Here is a bit more info on the issue. With the belt completely removed, I can easily rev the engine up to 7500rpm's or so. With the belt back on, the engine feals bogged down, and won't rev over 1500rpm's at WOT. The two discs around the belt on the rear pully turn with the belt just fine, but the outer wheel (the one you turn to make the rear wheel turn, doesn't appear to be engaging, and doesn't turn at all. One problem - I've not been able to loosen the bolt on the rear pully at all to investigate the condition of the springs. I tried getting the nut loose while holding in the rear brake, but it still turns - causing the wheel to turn. My second attempt involved placing the scoot so that the front wheel was against a brick wall to keep it from moving forward, but when I did that, and tried to loosen the bolt on the rear pulley, the rear wheel still turned by sliding across the concrete. I did use an air compressor with a impact wrench, but it didn't have enough power apparently - even at 100psi - to remove the nut.
I will attempt to make a video later this week to show this more clearly .I'm beginning to wonder if my new belt may not be long enough. The original was a cheap 842-20-30 (which is all the writing visible on it due to it being shredded when it broke). I purchased a replacement gates standard belt 842-20-30 and had a heck of a time getting it on. It certainly didn't appear to be as loose as the ones shown in several instructional videos on the web - for example, you can't squeeze the middle of the belt and then slide it on to the pulleys. Instead, you have to get it mounted to the rear pulley and then "walk" it on to the front one. I suppose it is also possible that the clutch is broken or not engaging properly. Should know more if I ever get the variator pulley off.
I greatly appreciate all the responses - this is an awesome site, and I will share this with my scooter riding buddys.
thanks
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Post by harrywr2 on Sept 7, 2008 13:04:36 GMT -5
An oil filter wrench works nice on the clutch so you can get the nut off.
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Post by flynlow on Sept 7, 2008 14:32:27 GMT -5
An impact gun will greatly help in that variator removal. I bought one to remove mine and its done in an instant with the right socket.
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Post by undertheradar on Sept 7, 2008 15:41:20 GMT -5
Spray some PB Blaster or break free on that nut. I had to with my clutch bolt. Tried it for half an hour with the air tools and it wouldn't budge. Sprayed it with the PB and it came right off.
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Post by pukame2 on Sept 7, 2008 16:41:09 GMT -5
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Post by motomech on Sept 7, 2008 19:00:44 GMT -5
Yeah, wrong belt, you shouldn't have to fight it on.
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Post by countryham on Sept 8, 2008 20:36:07 GMT -5
i hate to disagree motomech.but i had to do the same thing.the best way is to remove front drive pulley -slip belt onto open clutch -then slip over front pulley.btw you will need an impact wrench.wally world 34.00.good luck -i am fighting a similar problem.let us know how you resolve your problem
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Post by jerrycurl on Sept 9, 2008 8:38:33 GMT -5
Turns out the belt is a perfect match for the one that broke, so I'm thinking that isn't the problem. Tried to remove the bolt on the rear pully (clutch) to investigate issues there keeping the scooter from going - but still haven't been able to loosen the bolt. Tried the wal-mart impact wrench - which is capable of 150 pounds of torque - but it wouldn't loosen it. Going to pick up a 550 pound torque impact wrench tonight and try that. I'm thinking my clutch may either be stuck or not engaging at all. The belt turns with the motor turned on - with a max rev of about 1000rpm with the belt on - 7500rpm with the belt removed. The rear pully turns - but the clutch doesn't seem to engage enough to make the rear wheel move when up on a stand. EIther the clutch is stuck in "high" gear (the belt broke when i was going up a hill at 40mph), or maybe a spring is broken or something. Hopefully I'll be able to loosen the bolts. I've been soaking them in pb blaster all night, and will try heating with a propane torch as well.
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Post by warrior91 on Sept 9, 2008 21:38:19 GMT -5
Rollers are likley grooved, weights are worn and catching...or hopfully you over streched it and the variable side is kinda wedged and won't slide...When my old horses clutch was worn bad (My fault) I had to kick the clutch when I stopped to get it to squeeze up tight again after ridng.It would work if I didn't go over 40mph...but if I did I had to give it a boot to go again.
If it was under load and at high "gear" and the belt blew...It could be "jammed" in high.
That being said give it a solid square blow with a rubber hammer. It just might quit binding and function normally again.
Check rollers & Dogs for propper function.clean dust out of clutch with air and you could wash by spraying ether into nooks andcrannys and watch the BLACK gunk run out.
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Post by jerrycurl on Sept 11, 2008 8:26:38 GMT -5
Turns out that the scoot was essentially stuck in High gear. I was finally able to find an impact wrench that would loosen the bolts on the clutch and quickly figured out that this was the case. I'm now back on the road.
thanks again for all the help.
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Just keep your fingers away from it.
