Ya need a smoothbore. Look in the MB5 world. I think they are the same mill. I believe the Europs had a 80cc big bore kit fer these but you'll hafta dig. Good luck!
Making my old Moped faster?
Kinda O/T, but I thought I'd give it a try anyway. I've got a 1982 Honda Urban Exress moped(vintage by most moped standards 
). 49cc, 2 cycle, miniture CV carb, centrafugal clutch, etc. Problem is it tops out at 23-24 MPH(30 downhill with a tailwind). Being that slow, I'm always in the way of other motorists(not good). Are there any cheap and easy things I can do to get more top speed out of it? I tried a velocity stack instead of a filter, that didnt help. I fiddled with the jetting a bit to no avail(went slower with both more jet and less jet). I turned the mixture screw 1/2 turn at a time, and it made almost no difference. Any tips would be appreciated. Thanks.
). 49cc, 2 cycle, miniture CV carb, centrafugal clutch, etc. Problem is it tops out at 23-24 MPH(30 downhill with a tailwind). Being that slow, I'm always in the way of other motorists(not good). Are there any cheap and easy things I can do to get more top speed out of it? I tried a velocity stack instead of a filter, that didnt help. I fiddled with the jetting a bit to no avail(went slower with both more jet and less jet). I turned the mixture screw 1/2 turn at a time, and it made almost no difference. Any tips would be appreciated. Thanks.1 - 8 of 8 Posts
Craven Moorhead said:Thanks for the info. I'll keep you posted on my "Results."lilbill said:
What do you mean by "pull a few teeth off and stretch the flex"? Have anything to do with the clutch governer under the primary pully?
Bugman said:You said you were running out on top end, If you take a few teeth off of the rear gear and increase the header or flex length you should be able to get more out of the top end. You can also increase the intake tract length for more bottom and conversley shorten it for more top. I was just looking at the lowest cost ease of use options. There is a ton of shit you can do to a two cycle to gain performance most involve machining and parts.Craven Moorhead said:Thanks for the info. I'll keep you posted on my "Results."
What do you mean by "pull a few teeth off and stretch the flex"? Have anything to do with the clutch governer under the primary pully?
1 - 8 of 8 Posts
