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Post by humanshield on Aug 25, 2016 9:13:50 GMT -5
Just wondering what others who've upgraded their 4T found gave the most bang for the buck (besides a Big Bore Kit)
I was considering an exhaust upgrade, but ther4e's not much out there and I'm not sure an exhaust change would do much on an 83cc one cylinder scooter.
Other than the BBK, I would say the biggest gain in performance I got was about a toss up between the A9 cam and the 20mm semi-big valve head (vs 18mm for stock)
What did you add (or do) that resulted in the biggest performance gain for your scooter (other than a BBK) ?
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Deleted
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Post by Deleted on Aug 25, 2016 9:41:40 GMT -5
Variator tuning. Best bang for the buck I have done thus far. Next to that is my exhaust. Nothing earth shattering but, a noticeable improvement.
Since you eliminated the BBK in your question, I would say that if the BBK was 10 on a 1-10 scale of best improvement mods, I would put variator tuning at #4 and exhaust at maybe #2, and intake/air filter at maybe #1. So, in my opinion, all of these other things help, but obviously not as much as increasing cc's.
Bill
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Post by humanshield on Aug 25, 2016 10:09:13 GMT -5
Variator tuning. Best bang for the buck I have done thus far. Next to that is my exhaust. Nothing earth shattering but, a noticeable improvement. Since you eliminated the BBK in your question, I would say that if the BBK was 10 on a 1-10 scale of best improvement mods, I would put variator tuning at #4 and exhaust at maybe #2, and intake/air filter at maybe #1. So, in my opinion, all of these other things help, but obviously not as much as increasing cc's. Bill You havent tried a cam? On my scoot it made as much difference as the BBK |
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phatmanxxl
Scoot Enthusiast
Posts: 484
Location: Missoura
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Post by phatmanxxl on Aug 25, 2016 10:28:10 GMT -5
From what I've read the "performance" cams are the same as the stock ones. If anybody could recommend from experience which would be a significant can to upgrade to that would be great!
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Post by jeff84 on Aug 25, 2016 10:35:58 GMT -5
From what I've read the "performance" cams are the same as the stock ones. If anybody could recommend from experience which would be a significant can to upgrade to that would be great! guess that depends on what scooter and what cam you are talking about. the naraku cam in my piaggio definitely gave me a lot of low end grunt. same amount of lift with more duration. so I guess you could say its the same, since the lift hasn't changed. for quite a bit more money malossi has a cam for my engine that provides both more lift and more duration. i'm about to try my hand at some head work, that should add some more umph. also going from 78cc to 88cc. why didn't anyone warn me this would be addictive and suck the life out of my bank account. |
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Post by 90GTVert on Aug 25, 2016 10:45:36 GMT -5
The NCY "performance" cam on my old 4T helped it pull harder at higher revs, but not as much of a change as 50cc to 70-80cc made.
Depending on the setup, fine tuning could go a long way. Some of these combos with huge combustion chambers and wide clearances and ports full of casting defects may see nice gains from spending some time with them. If you're lucky and you have good compression and clearances and clean ports out of the box, not so much. If you have tools and some sealant around, some of this may be free.
Not a big gain, but the ignition pickup mod was a nice gain for costing nothing.
If a scooter comes from the factory with the flywheel machined wrong (one of mine did), putting a degree wheel on the thing and re-clocking the flywheel without the woodruff key can give a big gain. My 80cc still did 30-35MPH till the flywheel issue was found. Then it jumped up into the 40s.
Air pressure is another free mod that can be big. Check those tires. They'll run like crap at 20psi compared to 32-36psi.
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Deleted
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Post by Deleted on Aug 25, 2016 10:50:29 GMT -5
Variator tuning. Best bang for the buck I have done thus far. Next to that is my exhaust. Nothing earth shattering but, a noticeable improvement. Since you eliminated the BBK in your question, I would say that if the BBK was 10 on a 1-10 scale of best improvement mods, I would put variator tuning at #4 and exhaust at maybe #2, and intake/air filter at maybe #1. So, in my opinion, all of these other things help, but obviously not as much as increasing cc's. Bill You havent tried a cam? On my scoot it made as much difference as the BBK No, no cam or bbk on mine. I am pushing 5,000 miles and do not want to lean on it too hard. Bill |
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Post by humanshield on Aug 25, 2016 11:48:03 GMT -5
When I measured the A9 cam I received, the biggest difference was the duration.
However, we're talking very small amounts.
If you feel no difference after installing an A9 cam, you got a fake.
The difference with an authentic A9 is dramatic. Like adding a big valve head.
Be careful where you buy from.
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phatmanxxl
Scoot Enthusiast
Posts: 484
Location: Missoura
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Post by phatmanxxl on Aug 25, 2016 12:11:00 GMT -5
From what I've read the "performance" cams are the same as the stock ones. If anybody could recommend from experience which would be a significant can to upgrade to that would be great! guess that depends on what scooter and what cam you are talking about. the naraku cam in my piaggio definitely gave me a lot of low end grunt. same amount of lift with more duration. so I guess you could say its the same, since the lift hasn't changed. for quite a bit more money malossi has a cam for my engine that provides both more lift and more duration. i'm about to try my hand at some head work, that should add some more umph. also going from 78cc to 88cc. why didn't anyone warn me this would be addictive and suck the life out of my bank account. I'm in the same boat, scooter upgrades are balanced in with the monthly bills. |
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Post by gsx600racer on Aug 25, 2016 13:11:01 GMT -5
Stickers, lots and lots of stickers.  I will have to agree with PirateLabs, I think most CVT are tuned/restricted to comply with safety regulations. |
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Post by jeff84 on Aug 25, 2016 14:52:17 GMT -5
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Post by fts902 on Aug 25, 2016 18:32:48 GMT -5
Has anyone experimented with a crankshaft?
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Post by joshua864 on Aug 25, 2016 23:32:59 GMT -5
Has anyone experimented with a crankshaft? I did a 52mm taida kit with bvh and hoca 44mm stroker and you can deffinatly tell a difference |
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Post by dan50 on Aug 27, 2016 0:39:33 GMT -5
Has anyone experimented with a crankshaft? I haven't messed with a crankshaft in my scoots, but a stroker crank will deliver more torque (I found that out in a '69 Dodge Super Bee 440ci V8 that I had, wish I still had it). It also should increase the compression ratio so premium fuel is a must. Acceleration would improve, but won't give you any more top end speed. For my money, the best gains I've had with a stock 4t were unsealing and tuning the carb with bigger jets, and tuning the CVT (also the cheapest ways to get more power). |
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phatmanxxl
Scoot Enthusiast
Posts: 484
Location: Missoura
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Post by phatmanxxl on Aug 30, 2016 18:40:28 GMT -5
Since increasing the CC's is not an option for me, I'm thinking about the A9 cam now.
I need to find other ways to get better performance. How significant will the difference be?
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