love2ride1111
Scoot Enthusiast
Posts: 222
Location: Indian Rocks Beach Florida
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Post by love2ride1111 on Aug 18, 2019 1:30:35 GMT -5
Ok I have a kitted 70cc scooter. So when I start it and get to the corner and then pull the throttle the revs will jump to 8 or 9 k and about 40 mph in a couple seconds, it rips ! . Then down the road a bit I might come to a sign or stop light and when I take off it will only rev to 4 or 6 k. It will get up to speed and rev higher eventually but not quickly. If it sits or turned off it will rev high again. So strange . Any ideas? Thank you.
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Post by 190mech on Aug 18, 2019 3:52:17 GMT -5
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Post by ThaiGyro on Aug 18, 2019 7:50:29 GMT -5
Yes, sounds like CVT tuning issues. Or..maybe you are driving on freshly paved roads on 110 degree days?
Slow-lee, twying to ac-cel-er-ate.
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love2ride1111
Scoot Enthusiast
Posts: 222
Location: Indian Rocks Beach Florida
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Post by love2ride1111 on Aug 19, 2019 20:56:29 GMT -5
Ok yea sounds logical , might be worn out or I never greased anything in the 14 years I've owned it, lol. . I'll pull it, clean it and grease the area I guess, meanwhile I orderd a new 1.5 k contra and clutch springs so I know it will drop back down when I start off again. 👍
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Post by matlock on Aug 20, 2019 15:03:47 GMT -5
ok nice
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Post by matlock on Aug 20, 2019 15:04:02 GMT -5
cool bikes
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Post by harleyracer59 on Aug 20, 2019 16:22:42 GMT -5
could be running rich. cold engines like more fuel. next stop and take off its warmed up and now doesn't like that extra fuel? have you done a plug chop?
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love2ride1111
Scoot Enthusiast
Posts: 222
Location: Indian Rocks Beach Florida
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Post by love2ride1111 on Aug 20, 2019 18:42:19 GMT -5
Interesting why more fuel in the beginning would that change performance later?? . Idk. I orderd the springs but I just pulled it apart a bit ago to put a new belt and rollers in that I recently got. I did not unbolt where the contra spring is but I pushed on the pulley half and it was strong Idk what it could be hanging up on. Any way put it back together with new polini belt and lighter weights which I really didn't want I wanted heavier so it's top end is lower rpm. Anyway, holy cow it just ripped pulls the front up and jumped to 8 and half k immediately each short run I did at the storage facility I have my tools at. BUT 2 problems. First after a couple seconds of the ripping it fell back below 6 k me doing no changes to throttle before slowly moving up again,... sigh. Then 2nd after a few of that I wanted to take it out to the road for a short test, right as I pulled on to road and the throttle it was right back to slow poke crap acceleration. I will try lean it up bit and look at plug.
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Post by harleyracer59 on Aug 20, 2019 20:40:26 GMT -5
Interesting why more fuel in the beginning would that change performance later?? . Idk. I orderd the springs but I just pulled it apart a bit ago to put a new belt and rollers in that I recently got. I did not unbolt where the contra spring is but I pushed on the pulley half and it was strong Idk what it could be hanging up on. Any way put it back together with new polini belt and lighter weights which I really didn't want I wanted heavier so it's top end is lower rpm. Anyway, holy cow it just ripped pulls the front up and jumped to 8 and half k immediately each short run I did at the storage facility I have my tools at. BUT 2 problems. First after a couple seconds of the ripping it fell back below 6 k me doing no changes to throttle before slowly moving up again,... sigh. Then 2nd after a few of that I wanted to take it out to the road for a short test, right as I pulled on to road and the throttle it was right back to slow poke crap acceleration. I will try lean it up bit and look at plug. a cold engine needs more fuel to start. that's what the choke circuit does. it richens up the jetting on start up and the bystarter slowly closes the cicuit as engine warms up. id look into jetting. unplug the bystarter and see if performance doesn't fall off. if it stays faster for longer than a lap, you could be lean and choke circuit is providing the last little bit of fuel to be stoich. but choke circuits usually pull from a small side well. so once it goes dry, youre back to lean
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love2ride1111
Scoot Enthusiast
Posts: 222
Location: Indian Rocks Beach Florida
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Post by love2ride1111 on Aug 20, 2019 20:53:23 GMT -5
One says to rich the other says to lean , idk , lol . Its pretty rich I think. I have a 90 main jet in a 17 mm Arichie carb about 1 and 3 quarter turns out . I was watching some videos , can the pins on the back clutch pulley get damaged to make it hang up , idk its strange predicament .
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Post by ThaiGyro on Aug 20, 2019 23:43:12 GMT -5
Ok yea sounds logical , might be worn out or I never greased anything in the 14 years I've owned it, lol. . I'll pull it, clean it and grease the area I guess, meanwhile I orderd a new 1.5 k contra and clutch springs so I know it will drop back down when I start off again. 👍
Just a quick side note: We replace springs more often than most ppl. Maybe more often that really needed. Here, in Thailand, we see 35 degree days, (95F) 70+% of the time. Nothing lasts long...heat kills, time kills and use kills. We start with springs that are a bit stiff, because they come into their own from heat and use. Good to great...to good and replace. CVT's are cool that way. Tunable.
My point is that spring steel has a life. A poor one if you actually measured. After 14 years, you are surely due.
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love2ride1111
Scoot Enthusiast
Posts: 222
Location: Indian Rocks Beach Florida
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Post by love2ride1111 on Aug 21, 2019 11:19:35 GMT -5
All that killing an all , sheesh because I heard Thailand was beautiful :-). Anyway I am here on the Gulf of Mexico in South Florida , sounds identical to the weather here. So I completely agree. Now I am trying to decide if I just want to upgrade the whole clutch , springs and pulley back there . Can anyone point me in the right direction for a good deal on that set up ? Thank you.
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Post by jloi on Aug 21, 2019 11:44:39 GMT -5
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love2ride1111
Scoot Enthusiast
Posts: 222
Location: Indian Rocks Beach Florida
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Post by love2ride1111 on Aug 21, 2019 12:44:16 GMT -5
Ironically I know the place and its employees . I tried ordering online could not find clutch/transmission setups for my 2 stroke Kymco. I went on their chat the other day requesting what I needed and 5 hours later they could not find anything or were to lazy and just disappeared from screen for hours , Idk didn;t help.
I love it that they are right near by as I have purchased items there before ,gone right to the warehouse.
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Post by matlock on Aug 21, 2019 14:22:57 GMT -5
glad u figured it out ride1111
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