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Post by pain merchant on Feb 7, 2005 11:26:37 GMT -5
I know with the use of a CDI unit, you can change the carb. on the ruckus. Is there a site out there with other carbs. that would fit our scoots? I really want to get rid of the stock airbox which means I'll have to jet the carb. This is kinda something I'm not really looking forward too considering how many problems and issues people are having with it. What would even be the perks of a diff. carb? All I want to do is just slap on a POD filter straight to the carb. but I don't want to end up opening up a bunch of other tasks. Who knows, just seeing if anyone else has looked into or has changed their carb.
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Post by Ruckass on Feb 7, 2005 15:24:42 GMT -5
What a coincidence. I just got an e-mail from my friend traveling in Japan and Taiwan. He sent some pics of a couple modified Zoomers. One was a shot of an aftermarket carb. Its a 27mm (HUGE) and shows its connection. Its made a company called Keihin. It needs a rubber connector but i dont see that being a big problem. He is going to look into sourcing some other parts for my Ruckus so I'll keep you posted. Ruckass
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nicad
Ruckster
Posts: 174
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Post by nicad on Feb 8, 2005 2:55:10 GMT -5
Oooooooooooooohhhhhh!!!!!!! -Ian
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Post by abe on Mar 6, 2005 7:44:36 GMT -5
27 seems pretty big for the stock motor. I've noticed and been told the Japanese do things on motorcycles just to bragg You can go for a bigger carb but I would keep it smaller. I sell the 20mm for the Ruckus. You will always have to fiddle with jetting. I've been gone of the forum for a while so I'm not sure how people's jetting is going. From Emails I know that it seems like everyone errors on the side of being too rich.
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Post by Dandy Dan on Mar 6, 2005 12:24:18 GMT -5
What mods to I need to do to get the 20mm in? I currently have access to an awesome machine shop (I'm in university and my current co-op job is at a place with everything including a TIG welder and a plasma cutter). They have been teaching me how to weld too!
The 20mm carb is a waste of $$$ unless you've done other mods like the cam correct? As soon as I hear a detailed update on how well the cam is holding up and on the performance I'll likely be ordering one.
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Post by abe on Mar 8, 2005 6:38:48 GMT -5
If you have access to a machine shop you are home free. You need to make a manifold and figure out a throttle cable. That's all you need to do to install a bigger carb.
You do need to free up the motor with a cam and or porting for it make a difference.
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bluesmokeracing
Ruckster
vote for me and all your wildest dreams will come true
Posts: 253
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Post by bluesmokeracing on Apr 8, 2005 21:21:55 GMT -5
about that manifold- racerpartswholesale.com and othe race car parts suppliers sell silicone hose up/down step hoses that would probably be realy good for this. (stockcarproducts.com may have some too) just measure manifole o.d and carb o.d and order a hose that is close.
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SuperJ
n00b Ruckster
Posts: 28
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Post by SuperJ on Apr 19, 2005 21:16:15 GMT -5
I agree that 27mm is way too big for a 50cc four stroke engine. A 2 stroke 80cc motocross bike uses a 24mm carb to flow way more air than a ruckus engine could ever dream of. 27mm will result in poor velocity through the carb, resulting a very soggy feeling engine. You want to use the smallest carb that is not hindering your engines breathing ability. Even 20mm sounds like it might be pushing it for a 50cc engine.
Has anyone coinsidered a tuned airbox? Does any company make such a thing for the Ruckus? A properly sized airbox can make significantly more power than an open air filter due to pressure pulses, similar to a tuned exhaust header.
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SuperJ
n00b Ruckster
Posts: 28
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Post by SuperJ on Apr 19, 2005 21:18:04 GMT -5
I do like that guys nice clean setup he achieved by eliminating all of the plastic intake garbage.
-SuperJ
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Post by abe on Apr 20, 2005 6:41:42 GMT -5
I agree that 27mm is way too big for a 50cc four stroke engine. A 2 stroke 80cc motocross bike uses a 24mm carb to flow way more air than a ruckus engine could ever dream of. 27mm will result in poor velocity through the carb, resulting a very soggy feeling engine. You want to use the smallest carb that is not hindering your engines breathing ability. Even 20mm sounds like it might be pushing it for a 50cc engine. Has anyone coinsidered a tuned airbox? Does any company make such a thing for the Ruckus? A properly sized airbox can make significantly more power than an open air filter due to pressure pulses, similar to a tuned exhaust header. 20mm is the biggest says me ;D I say 20 because with a maxed out motor 20 is right. Between the start and finish the carb will be too big but I'm not into selling an 18 only to sell a 20 later. 20 gives some bragging rights too and won't really hurt anything. The stock airbox is a tuned part. I'm pretty sure opening the snorkel a bit is the best way to go I just don't like fooling with it all the time. We have a new enclosed filter that is cool because it has plugs to tune the airflow. I know this is not what your talking about it is cool because you can dial in your jetting by restricting airflow. It also has a good volume and to top it off it uses a foam element, not real good for power but fine for the little Ruk motor. BlueSmokeRacing- I couldn't find the adapters on that site. Am I an idiot?
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bluesmokeracing
Ruckster
vote for me and all your wildest dreams will come true
Posts: 253
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Post by bluesmokeracing on May 15, 2005 20:46:08 GMT -5
oh sorry abe, i guess they dont. but they have silicone straight hoses... i thought i saw them on there. they have some cool really expensive tachs though ;D ill call thomas and ask where he got his from in his racecar.
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Post by Dandy Dan on May 16, 2005 19:22:18 GMT -5
Abe, what model of 20mm do you sell? It'd be nice if I could do some research before I decide. Any info you post here would be great or you could add it to the BSS.
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Post by Dandy Dan on May 30, 2005 14:45:06 GMT -5
I think the BSS is working on a machined piece to adapt a 20mm carb on to the intake port. If you look you'll see the port comes out of the engine and then a 3" additional metal tube is bolted to that. On the other end of the 3" tube is a rubber tube to the carb.
The 20mm carb should come with the rubber piece so you can either fabricate your own metal reducer tube, get a reducer rubber piece somewhere and use the stock 3" metal tube or wait and hope the BSS unveils one. I was talking to someone who has ordered the carb but abe says the custom piece isn't ready yet.
Also a porting tip: The main rubber hose going from the carb to the intake port slides over the metal intake. This means you have a 1/4" lip the air is running into right as it leaves the carb. If you port your engine be sure you grind this flat wall into more of a gradual slope. Actually anyone could do this pretty easily. Just remove the carb off of it and take out the 2, 8mm bolts. Then dremel it into a tapered entrance and bolt it back on. There's also a nipple that sticks way out into the airflow just downstream of this piece. You'll see a hose attaching to the intake port just past the junction. You can grind this nipple flush to the inside of the intake wall if you wish.
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Post by chanito on May 30, 2005 19:27:41 GMT -5
Nice tips Dandy, i have to do that next weekend
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Post by Dandy Dan on May 30, 2005 19:59:37 GMT -5
Pics will be in the 'H.O. Camshaft Installation and Porting" thread I'm starting later tomorrow.
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bluesmokeracing
Ruckster
vote for me and all your wildest dreams will come true
Posts: 253
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Post by bluesmokeracing on May 30, 2005 21:27:07 GMT -5
fast50s.com has 18 and 20mm carbs for sale for z50s. they say dont use the 20s for anything less than a 88cc kit. now granted they are aircooled old tech engines but does a ruck use that much more air? i think the 18 would be a better choice
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Post by Dandy Dan on May 31, 2005 9:29:02 GMT -5
Just to clarify: Any 20mm (or 18mm) carb will work on a ruckus. The only snag is the interface between the carb and the intake port and getting the throttle cable working. Correct? I think an 18mm might be a good option but if you got the H.O. cam and want to get it bored eventually I'd go with a 20mm. Do you guys think it's best to stick with a CV type carb? Or go with the other direct throttle pull type cuz it may be easier to adjust? At 170-200$ those carbs aren't cheap. Link to a cheap POD filter for a bigger carb: www.fast50s.com/cart/customer/product.php?productid=188&cat=3&page=2
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Post by Dandy Dan on Jun 1, 2005 12:16:53 GMT -5
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Post by chanito on Jun 1, 2005 18:10:44 GMT -5
Guys i hate to burst your bubble but the stock carb is an 18mm Keihin CV, a year ago i would had said it was too big, but the people at Honda did their homework, a 20 would probably work but setting it up will be tough, cv carb are the best for the street, harder to set up initially but once set up is a cakewalk, thje sliding throttle kind, will need constant adjusment, but since they have screws for lean and rich are fairly easy to adjust (but they unjust that easy too)
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Post by Dandy Dan on Jun 1, 2005 19:07:03 GMT -5
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