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Post by pinkflames420 on Jan 18, 2017 2:03:23 GMT -5
I am the owner of a 2009 50cc keeway hurricane. I would like to put a couple hundred dollars into my scooter to turn it into a 70cc. I assume it will take more than just changing the carb jets , so I will have someone do the labor work if need be. I just need to know the exact parts I need! Is it just a new carb and new air filter or will I have to upgrade more? thanks for any help!   |
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Post by diynuke on Jan 18, 2017 2:34:55 GMT -5
I am the owner of a 2009 50cc keeway hurricane. I would like to put a couple hundred dollars into my scooter to turn it into a 70cc. I assume it will take more than just changing the carb jets , so I will have someone do the labor work if need be. I just need to know the exact parts I need! Is it just a new carb and new air filter or will I have to upgrade more? thanks for any help! well depends on what you have on there now since the exhaust is an pretty big variable so can we have some more info on what you have on there now? |
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Post by aeroxbud on Jan 18, 2017 5:38:37 GMT -5
You could even run a sport 70 kit on the standard carb, air box and exhaust if you wanted. might not get the best performance out of it, but you could get it to work
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Post by Lucass2T on Jan 18, 2017 5:42:29 GMT -5
You only need some jets. Usually 6-12 sizes bigger than stock or current size.
No need for replacing the carb, clutch or variator or exhaust or anything really. You don't even need to replace the sparkplug!
So after swapping over the cylinder, you could put a bigger jet in and see how the motor responds.
When you're at it...also check for exhaust restrictors. You can use the search or google where to find em.
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Post by pinkflames420 on Jan 18, 2017 11:49:41 GMT -5
I'm not exactly sure what is in my scooter. Everything is stock. I haven't changed a thing.
Besides swapping the cylinder for a 70cc and putting bigger jets in, what would be the next best thing to help performance? Bigger exhaust? As you can see in the pic, it's pretty small.
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Post by pinkscoot on Jan 18, 2017 15:22:43 GMT -5
You could start by tuning the CVT a little. Maybe dropping the weights by a few grams or getting Dr. Pulley sliders. How old is the scoot and how many Miles? maybe a new belt will help. Those are all cheap and easy things. You won't necassarily see a higher top end but you'll get there sooner. I just put lighter weights in my neighbors GY6 scooters and they think they have brand new scoots.
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Post by ThomasTPFL on Jan 18, 2017 16:53:40 GMT -5
I'd spend money on a pipe before a kit. Kit without pipe won't be as exciting. Proper expansion pipe will be night and day from a stock exhaust though.
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Post by ThomasTPFL on Jan 18, 2017 17:06:14 GMT -5
And if your scooter is indeed bone stock. It may have a restrictor inside the exhaust. You'd have to pull off the pipe to check. It'd be a ring in the header end necking the flow down.
You may have a restrictor on the variator. That'd be a washer preventing the sheaves from fully closing.
You could have a restricted CDI, my experience is those are noticeable. You're buzzing along, hit a certain rpm and the bike starts running like crap.
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Post by diynuke on Jan 18, 2017 18:14:32 GMT -5
But how fast do you want to go
50mph can be done with 50cc but then you need to
Upgrade exhaust. In the netherlands the yasunu c16 is very popular and for the rest just unrestrict it and rejet because if the exhaust change and if it still isnt fast enough i would suggest getting an 70cc on it.
But indeed first tune the cvt
Then exhaust the rejet
After that bigger bore
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Post by niz76 on Jan 18, 2017 18:56:04 GMT -5
I personally really like a 70cc kit with stock exhaust and carb. Very torquey setup, easy to tune, and fun to ride!
I've had a few scoots setup like this and really enjoyed them. Install BBK, upjet, and ride!
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Post by pinkflames420 on Jan 18, 2017 22:37:48 GMT -5
And if your scooter is indeed bone stock. It may have a restrictor inside the exhaust. You'd have to pull off the pipe to check. It'd be a ring in the header end necking the flow down. You may have a restrictor on the variator. That'd be a washer preventing the sheaves from fully closing. You could have a restricted CDI, my experience is those are noticeable. You're buzzing along, hit a certain rpm and the bike starts running like crap. If the stator does have a restrictor, it can be so easy to remove the washer? Or will I need to change the weights? Also, by riding, I couldn't really tell you if the cdi is restricted or not. Is there someway to tell otherwise, by looking at it? I recall someone saying that a pink wire going in/out of the cdi is the one restricting the rpms? Is this true? If so, can it just be snipped in half and tapped up? |
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Post by pinkflames420 on Jan 18, 2017 22:50:29 GMT -5
Also, if my exhaust pipe is restricted, would there be a way to unrestrict it for now until I buy a nice exhaust pipe? It is fairly small to my eye but that just may be because it's a scooter lol you can see it in my pp.
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Post by ThomasTPFL on Jan 19, 2017 1:09:47 GMT -5
You'd have to pull the exhaust to see if it's restricted. It will be a ring/washer right at the cylinder end.
I just finished getting a bike running and cleaned up today. Was only hitting 30mph on the speedo. Pulled the exhaust, removed the restrictor, gained 10mph and made crazy difference in acceleration.
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Post by aeroxbud on Jan 19, 2017 1:57:57 GMT -5
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Post by pinkflames420 on Jan 20, 2017 3:19:39 GMT -5
Well findinout today, that my keeway hurricane doesn't really have any restrictions except for the catalytic converter in the exhaust. So I guess we will start with a 70cc bbk and bigger jets for now until I learn a bit more about my weird exhaust/expansion chamber "looking" thing(I thought was the silencer), ctv tuning, and after I actually try out the bbk.
Ps. Quoted by scooter tuning about a product they have a 25mm air filter piece to fit into a hole that you drill into your air box to increase airflow...
"In combination with big bore carbs, the amount of air that original air filters can pass is insufficient. To get rid of this problem you can simply drill additional holes of 25mm into your airbox and stick these little airfilters on it. They have grills and blue filters and are a clever way of increasing the air flow."
Should I consider doing this before I send my scoot off to get the bbk installed? Maybe buy 2 since they are 25mm, I don't mind.
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