what could I expect.. BBR Tuning 38cc 4-Stroke Rear Axle Drive Engine Kit

[adamkcasto]

I am very drawn to the style of engine propulsion on the bike berry axle mount kit. years ago i had a 80cc 2 stroke mid motor mount on a single speed beach cruiser. was fast but couldn't handle West Virginia's hill. i have been eyeballing this 38cc kit a for a couple weeks now.

BBR Tuning 38cc Lock-N-Load Friction Drive Bicycle Engine Kit- 4-Stroke

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after 2 e bikes that were good but now what i was hoping for , i'm considering a motorized bike. i have a 17 mile each way commute with about 1500 feet of climbing. what im hoping for is to hold a 25 mile and hour pace on the flats and help on the hills. I want a fast bicycle experience not a slow motorcycle, so i will be pedaling all the way. is this a reasonable expectation??

thanks in advance!

 

[Old Busted Hotness]

25 on the flats should be no problem, but I don't think 38cc is enough to tackle a WV hill. If you're helping (or it's helping you) then it should work, but don't expect to maintain much pace going up.

 

[try 1897]

Where abouts are you in WV ? I lived in Martinsburg WV for over 20 years but moved on south to Crisfield Md. It's flat here no hills at all . A tiny engine does fine. Tom

 

[adamkcasto]

thanks for the info! i live in Fairmont WV just south of morgantown and the PA border. i am looking at the motor help to flatten the hills out some not do the work for me,, i did a normal bike commute for 10 years but the current job is just to far for a regular bike to do daily. esspecially with all the tiny mountains around here.

side note:
how much difference would i see between a 44t and a 36 t sprocket?? im thinking of going mag wheels but seems like best you can do is 36t with the adapter....

 

[CrazyDan]

If you want to gear for hills, you need a larger sprocket on your wheel, not smaller. The only thing I see worth it in that kit is the engine, although it's a bit anemic at 1.3 hp. It looks like this pocket bike transmission with about $40 more of stuff (at the most) that I would replace. The mount even looks too flimsy to keep...

 

[The_Aleman]

I think you'd need to find out exactly how much reduction that thing has before you figure out what rear sprocket to run. Looked at those kits myself, but I can't find any info on the reduction. Just by looking at it, that system doesn't appear to have enough reduction to allow the engine to rev out with a 26" wheel, which would mean the engine wouldn't get into it's powerband unless you were at a speed the engine doesn't have enough power to attain. It looks as tho it's made for smaller wheels.

Anyone have any info on the reduction?

 

[CrazyDan]

The reverse rotation tranny on there has 5:1 reduction. The output shaft is a 10t going to a 44t. So its 22:1, that might be just fine for hills even with that weak motor.

 

[The_Aleman]

Thanks for the info, never could find the reduction when I was looking around. Might pick one of these up, myself.

 

[CrazyDan]

The engine gets max torque at 5500 rpm, on a 26" wheel thats 19.4 mph. Max hp is at 6500 rpm, that's 22.93 mph on a 26".

 

[Will'smotobikes19]

Hey dude you could get the transmission by itself and get a higher HP motor like the goped gp460 4hp motors and put that on it will bolt on or a zenoah.