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Old 01-23-2015, 06:14 PM   #1
T84A OP
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Won't rev past 6k when riding

Need help. I have a Chinese 170cc GY6 that I can't seem to figure out. It's basically brand new. I purposely bought a bigger scooter (even requires tag) so I wouldn't have the exact problem I'm having. It's slow, and won't rev past 6k. On the center stand, it will rev to 8500+. So, being a total newb to these things, I bought an upgraded carb (still 24mm) bigger jets and lighter rollers. Well, today I went from 107 to 120 on the main-no difference. Then, I went from 13g to 11g on the rollers-still maxes at 6k. I also replaced the CDI and coil. I'm stumped. Motorcycles I can figure out, scooters not so much. I appreciate any help. Thanks.
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Old 01-23-2015, 06:39 PM   #2
tortoise2
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Quote:
Originally Posted by T84A View Post
Chinese 170cc GY6 . . won't rev past 6k. On the center stand, it will rev to 8500
Link please.

Have you observed if the variator and clutch are working normally with the CVT cover off?

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Old 01-23-2015, 06:41 PM   #3
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Quote:
Originally Posted by T84A View Post
Need help. I have a Chinese 170cc GY6 that I can't seem to figure out. It's basically brand new. I purposely bought a bigger scooter (even requires tag) so I wouldn't have the exact problem I'm having. It's slow, and won't rev past 6k. On the center stand, it will rev to 8500+. So, being a total newb to these things, I bought an upgraded carb (still 24mm) bigger jets and lighter rollers. Well, today I went from 107 to 120 on the main-no difference. Then, I went from 13g to 11g on the rollers-still maxes at 6k. I also replaced the CDI and coil. I'm stumped. Motorcycles I can figure out, scooters not so much. I appreciate any help. Thanks.
Compression check?

Is the carb too big and you cannot get airspeed to get away from a stop?

Is the rear brake dragging?
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Old 01-23-2015, 06:48 PM   #4
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Originally Posted by tortoise2 View Post
Link please.

Have you observed if the variator and clutch are working normally with the CVT cover off?
Link to what?

http://youtu.be/sYVvy-pZ1xM
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Old 01-23-2015, 07:03 PM   #5
tortoise2
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Originally Posted by T84A View Post
Link to what?
Link to your scooter model. Is it a Dongfang 200 with a GY6-B engine variation?
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Old 01-23-2015, 07:21 PM   #6
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Link to your scooter model. Is it a Dongfang 200 with a GY6-B engine variation?
I believe. I'm struggling to verify the -B. The engine stamp states 161QMK-A
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Old 01-23-2015, 07:49 PM   #7
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Originally Posted by T84A View Post
The engine stamp states 161QMK-A
ScrappyDog reference.
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Old Yesterday, 06:19 AM   #8
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Yeah, I saw that. Thanks

But I still would like to solve my problem.
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