🏁 Rev Up Your Adventure with RUTU!
The RUTU 69mm Valve GY6 Big Bore Kit is engineered for 49cc, 50cc, and 139QMB scooter engines, featuring a 50mm cylinder block that boosts displacement to 90cc. This kit enhances horsepower and speed by 5-10 mph, includes a racing CDI ignition coil, and is built with durable materials for long-lasting performance. Installation is straightforward, supported by a comprehensive manual, and backed by a 1-year replacement warranty.
| Manufacturer | RUTU |
| Brand | RUTU |
| Item Weight | 6.38 pounds |
| Package Dimensions | 17.4 x 8.19 x 5.08 inches |
| Country of Origin | China |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | RUTU69 |
J**L
Easy install, works great
No problem with the install, had it done in a couple hours and this was my first bbk install. I watched a YouTube vid for instructions. My 49cc gy6 was topping out at 35mph, now it goes 48mph on flat land no problem. Take off and hills are light years better as well. I have a stock muffler, gofit carb and stock air cleaner and roller bearings.
C**E
will buy again
Worked perfectly first install. Everything fit to specs on my 50cc 139qmb block. I ride every day, and have put over 2k miles on it with no issues. Will more than likely buy another to put on my other scoot as well. Definitely recommend this bbk.
J**8
SO FAR SO GOOD
If you know what you doing it's simple install me and my boy took a hour.... Definitely big improvement 👍 let's see how long it lasts . well recommended..... Will buy more soon
K**S
Garbage
Head gasket leaks oil. I put a new one on and it still leaks
I**C
Good
Still installing it but came with some extra goodies that all work dandy.
D**Y
Great upgrade
The installation was easy maybe 2 hours with clean up. Results were way worth the money I will definitely use in the future.
E**L
If ur looking for more power n speed , do this Upgrade!
Installed 1 on long case peace sports, 2 on short case peace sport. Upgraded from 50cc to 100cc, talk about speed! 1st long case I blew the piston on second test run ( my fault) I red lined it n quickly noticed my speed over 50. 2nd short case no issues but i instructed owner to break in period for 250-300 miles in engine before taking it to full throttle.
S**D
Cannot get the tapping to stop no matter what lash
Kit was great, had everything i needed, followed along with the instructions. However i have not been able to get the tapping/ chatter to go away from the valve cover area. It sounds like the rockers have too much gap and after about 20-30sec running it has a tapping sound that won’t go away no matter what lash i set my valves to. Wondering if i got a bad head out of it. Any way to send a replacement head to troubleshoot? I’ve tried 3 sets of rocker assembly’s and all have the same result
L**H
Recommended
Good gear good price cheers
Trustpilot
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