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Post by PCBGY6 on Oct 7, 2013 13:55:29 GMT -5
From what I can tell by just looking at the scooter cvt setup it's different then the one shown on scrappys how to video. I think the one they are using is from a gocart.
1: will I need to remove the muffler and rear tire to desperate the case?
2: is their a way to remove the clutch bell without a impact wrench?
Thanks,
PCB
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Post by pmatulew on Oct 7, 2013 17:14:14 GMT -5
Without an impact wrench? Yes, you need to make yourself one of these -->    Done carefully you can also stick the fingers in the clutch bell to get that nut off as well. |
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Post by PCBGY6 on Oct 7, 2013 17:26:12 GMT -5
That looks like a tool for removing the variator. I'm trying to get the clutch off so I can get access to the bolts behind it. I need to open the rear end up to get to the gears.
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Post by PCBGY6 on Oct 7, 2013 17:57:11 GMT -5
I'm just going to bite the bullet and drive up to Dothan and buy a impact and other tools I have been eyeing from harbor freight tomorrow. Road trip for goodies. Can't beat that.  |
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Post by alleyoop on Oct 7, 2013 18:27:04 GMT -5
If there isn't a PLATE with about 6 bolts behind the CLUTCH assembly THEN YES you will have to take the WHEEL off to get at the gears.
Alleyoop
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Post by PCBGY6 on Oct 7, 2013 18:33:16 GMT -5
Good thing it only takes a few minutes to remove them.
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Post by millsc on Oct 7, 2013 19:11:33 GMT -5
I've always taken the wheel off, never thought about doing it with the wheel on didnt know it was possible.
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Post by sailracer on Oct 7, 2013 19:41:56 GMT -5
yep, it's possible with the qmb139 gy6, but it gets a little unruly to handle when you re-assemble it.
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Post by PCBGY6 on Oct 7, 2013 19:50:08 GMT -5
I was looking at videos and some have the plate behind the bell like Alley was saying ( you can leave the wheel and muffler in for that) then some you have to pull the whole rear chuck off off like the gy6 most of us have. I wasn't sure before this this thread and researching more which one i had. Now that I have it the cvt cover, stock air box, wheel and muffler off i have a better understanding.
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Post by PCBGY6 on Oct 8, 2013 18:31:20 GMT -5
Ok I have the 50/16 scrappy gears in. So far I can tell that I have gained 5 mph gps and I had I let off because the slow car in front if me. I had 49/15 gears stock. I'm not sure how much of a difference that is but I like so far. I'm still running a stock cam and head so I'm hoping to get a few more mph out of her once I install new ones. Oh, I went from 37 to 42 mph and I weigh 250. Maybe some of you advanced gear heads can tell me if that is about right so far. So far I have. 50mm bbk Orange Cdi and coil 50/16 gears  main jet Stock air box Stock cam and head |
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Post by sailracer on Oct 8, 2013 18:41:44 GMT -5
you are right on track. Don't expect to see any greater difference in top end with a performance head.you did the gearing, now you should get a variator with sliders,and maybe some 1500 rpm clutch springs. an a9 cam in the stock head will help a little, but you have already upped the displacement for power, and done some gearing, now do the rest of the drive system to use the power better
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Post by PCBGY6 on Oct 8, 2013 20:09:30 GMT -5
Taking it out tomorrow to a road that has a 45 mph speed limit and seeing what I can get out of it. Like I was saying before, I had to keep letting off the throttle because of slower traffic in the 35 mph zone.
I have a a9 cam sitting here on the table that I'm going to toss in tomorrow and see how that goes also. I was surprised that I really didn't lose any of my take of speed from what I could tell. I'm going to order the scrappy big valve head and a exhaust this week. I may not get much more out of the engine but I'm going to squeeze everything I can out if it. After that I'm going to focus on the variator and clutch. Then if I still have really good take off I may try a tad taller gear. I know it's going to be tough but I have a goal of 50 mph gps.
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Post by alleyoop on Oct 8, 2013 21:05:05 GMT -5
Are you sure the gears you put in were 16/50 and are you sure the OEMs were 15/49??
Reason I ask is to get more top end speed you need a gear with More Teeth to turn a Smaller Gear with less teeth.
So I would expect maybe a 16/48 or 16/47 over the oem 15/49 Remember a bigger wheel will turns a smaller wheel faster. On the scoots the first number 15, 16 is the short shaft that is turned by the Shaft that the clutch turns which in turn then turns the primary gear which turns your wheel. And that primary gear should be smaller LESS teeth than the OEM while the Gear on the short shaft should have MORE teeth than the original.
Take a MOPED for example which is chain driven, the front sprocket on those usually around 25 teeth and the rear sprocket are maybe 50 or so. They have a strong pull off the line but no top end because of the big sprocket on the rear. So to get more top end speed you have to go down on the rear sprocket quite a bit to get more top end. On the mopeds you do not have much choice on the front sprocket to put in a bigger one, maybe a sprocket with one more tooth on it because it sits within a casing of the motor so not much room to put in a much bigger sprocket than maybe one with one more tooth.
I just question the number of gears that were in there and the set of gears that you bought, because it does not make sense.
Alleyoop
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Post by PCBGY6 on Oct 8, 2013 21:37:08 GMT -5
I handed them to a friend to count the teeth on the gears. I will dig them out in the morning and count them myself.
The ones I out in were the 50/16 gears I bought from scrappy and I counted the tether in them myself. Just by looking the small gear they sent was bigger the the oem. The lager gear with 50 tether was smaller. Again ill recount myself in the morning and post the tooth count.
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Post by PCBGY6 on Oct 8, 2013 22:13:21 GMT -5
I couldn't wait until morning. The correct count on the oem gears are 51/15. Maybe that will clear it up some. With the 50/16 gears I didn't really lose any take off speed. I'm guessing I should have done a tooth count so I could have ordered two up and two down to get the max out the gearing without bogging it down to much.
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Main Jet
..BAD TO THE BONE..
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