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Post by trouty56 on Mar 2, 2014 6:47:57 GMT -5
The only thing I have really done to the 50cc scooter is to put a 50mm BBK kit in....replaced the jet with the one from the kit (unmarked and unknown size), replaced the CDI and coil wire with the ones from the kit, and the rollers (unknown weight) from the kit.... New Gates belt too. Runs really good...big improvement over what I had in the beginning... still stock intake...stock exhaust....
This year I would like to replace the variator with a KOSO performance variator and slider weights...seems 5g are pretty popular. Would consider changing the clutch springs or contra spring to a 1000 if it would help any with holding rpms on the hills. I live in a hilly area but by no means mountainous.
I really try to read as much as I can and really don't have the extra cash to experiment as much as some of you guys so I thought I would tap into your experience.
When my speed gets to 40 I think the rpms are at it's peak....I get a weird sound and things don't seem right. That is why I want to change up the drive train....soooo any advice on what will work best in my case???
Or maybe changing the gears.....
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Post by millsc on Mar 2, 2014 12:31:50 GMT -5
I like the 1500 contra spring it seems to do a better job on holding rpms up on hills, I suggest a 1.5k spring koso variator and 8 or 9 gram sliders depending on what you weigh. That set up has done me good on many scoots, changing the gears will give a higher top speed but will slow you down on hills, if your fine with your top speed leave the gears stock.
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Post by trouty56 on Mar 2, 2014 13:45:33 GMT -5
I like the 1500 contra spring it seems to do a better job on holding rpms up on hills, I suggest a 1.5k spring koso variator and 8 or 9 gram sliders depending on what you weigh. That set up has done me good on many scoots, changing the gears will give a higher top speed but will slow you down on hills, if your fine with your top speed leave the gears stock. ....thank you for the reply...I weigh in at 200..... I appreciate your suggestions....I had started a shopping cart prior to this post with a KOSO variator, 5 gram Koso sliders, and 1000 rpm clutch springs....looks like I should up the sliders to say...8 maybe, clutch springs to 1500, and add a 1500 rpm contra spring in your opinion.... |
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Post by millsc on Mar 2, 2014 14:39:31 GMT -5
1.5k spring koso variator and 8 gram slider weights for 200 pounds stock or 1k clutch springs I don't care for the 1.5k or 2k clutch springs for in town riding would be ok if you was racing lol.
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Post by trouty56 on Mar 2, 2014 15:50:44 GMT -5
Oh...OK....misunderstood you.....now I get what you mean.....keeping the clutch springs stock for now.....thanks....
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Post by JerryScript on Mar 2, 2014 23:39:36 GMT -5
millsc can correct me if I'm wrong here:
8 gram sliders are for top speed, you will probably do better with 6-7 gram sliders, otherwise you are going to loose your bottom end acceleration, and have difficulty with hills.
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Post by millsc on Mar 2, 2014 23:49:13 GMT -5
The koso variator is way lighter than the stock variator and the 1.5k contra spring requires heavier weights so 8 gram weights with a 1.5k spring and a koso is like running 4 grams with the stock spring and stock variator. I run 9.25 grams on my tap out scoot with the koso and 1.5k spring I weigh 185 and it pops wheelies.
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Post by ltdhpp on Mar 3, 2014 12:24:19 GMT -5
Like they said, anything you do to try to get more top speed will hurt your acceleration. 40mph is about all your going to get out of a gy6 50cc no matter what you do, trying to get that extra 1 or 2mph isn't worth it. It probably sounds funny at that speed because your rpms are maxed out and it's out of its prime power range.
Before you go dumping lots of money into a 50cc, consider getting a 150cc.
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Post by trouty56 on Mar 3, 2014 19:39:50 GMT -5
Like they said, anything you do to try to get more top speed will hurt your acceleration. 40mph is about all your going to get out of a gy6 50cc no matter what you do, trying to get that extra 1 or 2mph isn't worth it. It probably sounds funny at that speed because your rpms are maxed out and it's out of its prime power range. Before you go dumping lots of money into a 50cc, consider getting a 150cc. I'm hoping to smooth things out a bit...I rode a Kymco scooter and it was so smooth running...mine has a lot of vibration in the drive train. The new Gates belt helped a lot. thought maybe a variator might help more. Besides...it is fun to buy little parts and put them on...whether they help or not. |
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Post by JerryScript on Mar 3, 2014 19:43:34 GMT -5
I agree, wrenching on these little scooters is half the fun! The Koso variator will definitely make a difference, I've been very happy with mine, and with 7g sliders on a 50mm bbk and 145lb rider, I'm staying in the power band all the time.
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Post by alleyoop on Mar 3, 2014 23:51:24 GMT -5
Yep, that KOSO variator on my 150 Trike is great, beats the heck out of my PRODIGY Variator that I paid Just about $100.00 bucks for(HEHE).
Alleyoop
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Post by trouty56 on Apr 4, 2014 4:36:21 GMT -5
OK...I feel pretty good about what I am getting out of this scooter now....the new Koso variator and 8 gram sliders coupled with the 1500 contra spring are keeping the engine at a good rpm on the hills and the top end is right there at 42 on the chinometer....thanks for the input...
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Post by wycpihdyn on Apr 4, 2014 16:08:39 GMT -5
only problem i ever seen with teh contra spring the big spring in the back, was that once when i switched to a deep angled kn-kikaku variator, after rolling down a hill, i was still using stock roller weights, my roller weights wasnt rolling back down to put me in 1st. as i got to the bottom of the hill, i was usually switching back to 1st at around 25mph or something. but i was at like 15mph at the bottom of that hill, and it was still in second, and when i revved and revved, it didnt go back down. just puttere dstill, without dropping. when i let off the throttle and let it stop and idle, the cvt shifted back down, then i could pull up the hill. i switchd to a 1000 rpom spring. i wouldnt switch unless its a problem, you dont like your hill pulling. if yoru not in teh powerband, your too early, then lighten the roller weights up. go with a spring for around your kit, id say 1000 even or maybe 1500. do 1000 grabbers and 1000 contra, try the kit with all the different springs in it. like that autotech guy on ebay has. i got that and liked it. you can tune anything you want. its not that bad, should be good for a regular motor
oh. and 1 reaso i say this, is ive never noticed, from changing to, 1000 rpm contra or 1500 that i changed my weights any. im using pretty much what anybody would tell me as weights right now. what someone would say, and went from 1000 rpm spring to 1500. have noticed no difference. dont think it stops it from switching. 500 rpms? so, how much difference in speed is that since it would be a graph then? instead? like, not a whole lot depending on what pseed you switch at. so, how much roller weight would it take? thats teh thing.
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Post by geh3333 on Apr 4, 2014 17:21:34 GMT -5
When it comes to the main clutch spring and your three smaller clutch springs they are usually just for greater pickup on straight and up hills . I now use a 2000 main and 2000 clutch springs . My clutch engages at 4000 rpms and at full throttle climbs to 7000 rpms until I hit about 40 mph which is pretty quick , then my rpms begin backing down , at 50 mph my rpms are down to 6000 and then begin to climb again 55 mph at 6500 rpms 60 mph at 7000 rpms and 65 between 7300 and 7500 rpms . I can hit nearly 8000 rpms on a straight and even run . About 68 mph . Yesterday one of my neighbors said last yr he was doing 50 in his car and I past him like he was sitting still. He couldn't believe how fast my scoot was .
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Post by JerryScript on Apr 5, 2014 0:29:23 GMT -5
OK...I feel pretty good about what I am getting out of this scooter now....the new Koso variator and 8 gram sliders coupled with the 1500 contra spring are keeping the engine at a good rpm on the hills and the top end is right there at 42 on the chinometer....thanks for the input... Glad you found your sweet spot! It's different for every rider based on their engine's/tranny's upgrades, the rider's weight and riding style, and the conditions they ride in. |
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..BAD TO THE BONE..
