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Post by scoots on Jul 9, 2013 11:23:44 GMT -5
about to buy but idk what size is good for a 100ccbbk
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Post by sailracer on Jul 9, 2013 11:30:16 GMT -5
I got 50/16 for mine. i have the 50mm bbk&head a lot of so-called 100cc bbks are really about 83cc
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Post by scoots on Jul 9, 2013 16:54:27 GMT -5
any noticeable difference?
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Post by prodigit on Jul 9, 2013 17:06:13 GMT -5
It really depends on what kind of performance you're expecting from it.
I'd always suggest to go with the largest gearing, meaning highest top speed, but if acceleration or hillclimbing is more important to you, you could stick with the stock gears.
You could also put taller gears on, and decrease roller weights, that way you also will accelerate faster, but still have a faster top speed.
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Post by scoots on Jul 9, 2013 17:14:40 GMT -5
so look for the largest?
and my scoot it sceaming at WOT but stuck at 40 mph
with a stock carb and 100cc bbk and 7.5 rollors and unlim cdi
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Post by millsc on Jul 9, 2013 17:19:09 GMT -5
16 50 set is only 37 bucks it does good I have 18 46 hoca set and like them more and more the more I ride on them
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Post by sailracer on Jul 9, 2013 17:23:29 GMT -5
I would'nt start with the largest, quite the opposite. The tallest gears are for the scooters that have BIG TIME mods, Stroker crank.big valve heads etc You need a lot of power for those. IMO, start out with 16/50s, and experiment with variator weights. Unless you have done extensive mods, stay away from anything larger. The motor wont have enough power for them ;D
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Post by millsc on Jul 9, 2013 17:24:23 GMT -5
I have a set of 16 50 id sell and two sets of 14 52 same as naruku +10 gears
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Post by millsc on Jul 9, 2013 17:29:47 GMT -5
I've tried 16 50 14 52 and now I'm running 18 46 I actually like the 18 46 best but they are not that much better than the 16 50 to justify the price difference they are almost double the price of the 16 50
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Post by sailracer on Jul 9, 2013 18:13:07 GMT -5
I guess it depends on what you're after for performance.I just want 40-45 mph without WOT all the time,& decent hillclimbing.Started with a new qmb139 from scrappy's did a 50 mm jug& ,piston 50mm head,A9 cam,koso variator with 5&6 gram sliders.20mm carb, I'll start with an  jet, and a set of 16/50gears. I got it all done, now to swap engines. What do you thinkof the setup? any input appreciated.;D |
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Post by prodigit on Jul 9, 2013 18:21:43 GMT -5
There you go, price also plays a big role. How fast do you want to go with it?
The taller the gearing, the slower it'll accelerate, and the more susceptible the top speed becomes to winds and hills (meaning top speed will lower significantly with a tall gearing if you're going uphill a lot).
So you got to balance the two a bit. That being said, I think an 18/46 is a good gearing. 16/50 is still somewhat short, meaning you will probably still go WOT, and be stuck at 45-50MPH. The 18/46 could get you higher top speed on level ground if you're not too heavy, or too tall, and there's not too much wind.
On my motorcycle I always aim for a gear ratio close to 16/38 (which is like a 18/42 should that ever exist). But that's for a chain drive, not a CVT belt drive. Seeing that my motorcycle is larger in cc's too, I can only estimate that you'll need something closer to the 18/46 they mention).
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Post by sailracer on Jul 9, 2013 19:24:39 GMT -5
I don't know about that. I've been following some builds a little better than mine, and one says the 17/49 gearing was too much for it and he hit 54 mph with 16/50s wot, so i think 40-45 with them is very do-able.
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jet
jet, and a set of 16/50gears. I got it all done, now to swap engines. What do you thinkof the setup? any input appreciated.;D