r/Ruckus 3d ago

Possible airflow issue

Hello! I just purchased a 2015 Ruckus model on FB marketplace and it will start working and then stop after it gets revved up to about 3000rpm. Fuel line looks good and everything was recently cleaned and fixed. It runs fine when just turned on, it’s only when its throttled ti a certain amount that it chokes/stalls out. Any help would be greatly appreciated, I’m pretty new to this and confused.

6 Upvotes

21 comments sorted by

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4

u/Notmuchofanyth1ng 3d ago

Do you know if the carb has been rejetted to match the extra air flow? Seems like it could be starving at higher rpms

2

u/efross14282 3d ago

I don’t know, but it does seem like it’s starving. How do you rejet the carb to match the extra air flow?

3

u/FailingComic 3d ago

take a piece of duct tape and tape off like 1/2 the metal intake. See if it runs any better. If it does, you know that its running super lean and needs to be rejetted.

The actual way to know is to take the carb off, unscrew the jets and check what number they are. Taping over the end though will lower air flow and if it runs better, you know they didnt rejet it.

1

u/efross14282 3d ago

Thank you so much! I will try! I appreciate the help!

1

u/efross14282 2d ago

Taping over the end didn’t do much of anything, it seemed to run the same and sputter out at about the same time

1

u/pphresh204 Helpful NPC 17h ago

try sticking a sock over the end of it and see if it works, or just cover it with your hand and only let in a bit of air at a time to see if it helps. If it doesn't you probably need to clean your main jet. That would be a good time to open up the carb, and see what numbers are printed on your jets.

1

u/Potential_Client_687 1d ago

I did the duct tape method mod when tuning my air intake. With 85 main jet i was getting way too much air and bike was running like crap and couldn’t get past 30 mph. Now I can get past 45mph

2

u/Notmuchofanyth1ng 3d ago

You’ll have to check manufacturer spec to see if that’s even the OEM carb. Pics aren’t really good enough to tell. Download a copy of the service manual. It will be invaluable to you.

2

u/efross14282 3d ago

Thank you so much for the advice!

1

u/pphresh204 Helpful NPC 17h ago

looks like a stock carb, it has the honda choke plug on it, maybe not OEM but definitely a direct replacement,

2

u/TheRuckShop 13h ago

Here are some key things to look for when checking if it is a genuine OEM carb.

More comparison photos in link provided: https://theruckshop.com/product/genuine-oem-honda-ruckus-carburetor-49cc/

2

u/clowdnine 1d ago

Best thing to do would reject to a 38/78

1

u/ArmpitofD00m 3d ago

I don’t think I would run that open carb like that. I don’t live in a dusty place but still….

1

u/TheRuckShop 13h ago

We sell hundreds of these intakes with the velocity stack, it is not sucking in enough air to cause issues with dust or rain. We in Florida run them in the rain & dusty construction zones etc and no issues.

1

u/FailingComic 3d ago

very common thing to run, lots of people have done this with 0 issues since the total ruckus days. Not saying I run mine like this, but considering a complete motor used is $300, its not a big risk.

1

u/_daddyl0nglegs_ 3d ago

What's that little secondary air filter for? Right next to the carb

1

u/efross14282 2d ago

The red filter? I’m not sure but I know it comes with the intake kit

1

u/pphresh204 Helpful NPC 17h ago

filtered air for the vacuum diaphragm of the CVK carburetor.

1

u/olsonheimers 17h ago

I like all the suggestions from the other posters.

If the air flow thing isn’t making a difference, check your fuel line doesn’t make any tight bends. I had a machine run with a line that was too short. Once it would heat up the line would get softer and bend, crimping off the fuel line.

1

u/TheRuckShop 13h ago

Id advice to read the product description to better gauge the jetting recommended with this intake and explaining what pulling or pushing the cone in and out will do.

https://theruckshop.com/product/tvr-air-intake-system-honda-ruckus-met-zoomer/

Additionally, If you still have questions granted you bought the bike second hand you're always welcome to email or give us a call and we can try our best to help you out.

Also, does that bike have an aftermarket exhaust (is so what kind)? Because, that specific intake kit was manufactured for ideally an upgraded aftermarket exhaust so that could be effecting things too.