12hp with a 50cc is already pretty good but I would go for a 21mm carb instead, 30mm is waaaay too big And I am guessing that you are building this bike for a 50cc race but if it isn't the case, the 88cc kits are the cheapest in terms of power-price at around 22-28hp
12hp from 50cc ? That's what I need for my motorized bicycle. My 49mm iron sleeve cylinder came all out of whack....You can see the intake port is crooked/sideways along with other problems.
@@backyardrestorations The non dud 49mm can make decent power 45-47mph top speed for the price ($35 top end kit) On my current bike I'm only looking to go 40 mph but still keep some bottom end power. Once I get a strong steel full suspension bike frame built and stronger wheels. Then I'll be willing to get better motor $.
@@backyardrestorations I'll be happy with my motorized bicycle once I get the dud 49mm port trimmings straightened out. Most people were able to just grind away the iron overhang casting on theirs without doing any port trimming work and they ran good. I'm running a reed valve now coz it had major carb spitting. I did a window piston, intake boost port & 3rd intake transfer port. Once I get bottom spacers made installed to fix transfer port trimming. It should run good. My 47mm jug runs good, gonna try and copy its measurements/ port trimmings onto the 49mm. The reed doesn't really make any more power than piston port on the China mb (unless all port work done perfectly to proper numbers and angles) but does improve mpg and get rid of carb spitting. Wish I had a degree wheel and knew exactly what trimming and angles to port everything to.
Athena cylinder
30mm lectron carb
Boyesen RAD valve (ktm 65sx)
Yasuni R3 pipe
Good config! Is it the powervalve athena cylinder kit?
No just Athena 6 port kit
@@backyardrestorationsathena 80 ?
Isnt the carb a bit on the larger side?
12hp with a 50cc is already pretty good but I would go for a 21mm carb instead, 30mm is waaaay too big
And I am guessing that you are building this bike for a 50cc race but if it isn't the case, the 88cc kits are the cheapest in terms of power-price at around 22-28hp
It has a 77cc kit
12hp from 50cc ? That's what I need for my motorized bicycle. My 49mm iron sleeve cylinder came all out of whack....You can see the intake port is crooked/sideways along with other problems.
Yeah those Chinese cylinders won’t ever make any power. Get yourself a minarelli vertical kit. That’s what this engine is. Minarelli AM6
@@backyardrestorations The non dud 49mm can make decent power 45-47mph top speed for the price ($35 top end kit) On my current bike I'm only looking to go 40 mph but still keep some bottom end power. Once I get a strong steel full suspension bike frame built and stronger wheels. Then I'll be willing to get better motor $.
Get a Boyesen rad valve, they made my bottom end amazing!
@@backyardrestorations I'll be happy with my motorized bicycle once I get the dud 49mm port trimmings straightened out. Most people were able to just grind away the iron overhang casting on theirs without doing any port trimming work and they ran good. I'm running a reed valve now coz it had major carb spitting. I did a window piston, intake boost port & 3rd intake transfer port. Once I get bottom spacers made installed to fix transfer port trimming. It should run good. My 47mm jug runs good, gonna try and copy its measurements/ port trimmings onto the 49mm. The reed doesn't really make any more power than piston port on the China mb (unless all port work done perfectly to proper numbers and angles) but does improve mpg and get rid of carb spitting. Wish I had a degree wheel and knew exactly what trimming and angles to port everything to.
@@michaelbrinks8089 make yourself one out of paper. It works just the same.
Hey just curious how much are these worth ? One just came up for sale here locally
I bought mine for 1200 but I could Easily get 2500 or more. Depends on condition mileage and mods.
Hi mate, how reliable would this setup be?
I had no reliability issues with this specific setup.
@@backyardrestorations Thanks for the info man
My mate Jeff Cope has just bought this I believe