Monster Scooter Engine

[Porkchop]

I'm using the HF engine on a BMP friction drive. I have no complaints with the 1" or 1.25" roller. AS far as what's the largest engine you can use, you didn't say legal or illegal. You need to check your local laws on that one. I'll bet GP460's are illegal in all 50 states.

 

[aero07]

I'm using the HF engine on a BMP friction drive. I have no complaints with the 1" or 1.25" roller. AS far as what's the largest engine you can use, you didn't say legal or illegal. You need to check your local laws on that one. I'll bet GP460's are illegal in all 50 states.

Unfortunately in Alabama you would be illegal with any motor you put
on a bicycle to drive on the streets. I was just trying to find out what the
largest displacement engine I could get that would still bolt right up to
my BMP friction drive unit (78mm clutch). I'm ok with the monster scooter
49cc just wanted to know for future builds. As for as displacement goes I
always think you can go BIGGER!!!!:
Maybe when I get this engine broken in it will be better. I have only
went wot a couple of times and then only a few seconds, waiting to get a few more tanks run through it.
I'm very pleased with it on the flats, its just the hills in my subdivision are kindof steep. To get up them just pedaling reguires using the lowest gears.
Oh well these things weren't meant for mountain climbing anyway,
but if you come across a bigger engine than the ones listed on the BMP site
please let me know. Thanks

 

[Whizzerd]

Hi Aero, my mitsi clone had been factory testrun(fuel in the primer bulb) and was very rich on the mixture. Started well and smoked alot. Not much power. After leaning the mixture a bit, the power was fine. Careful with that though, an overlean mixture on a 2 stroke denies the engine of proper lubrication and will burn it up.

 

[cycledude]

....I'm very pleased with it on the flats, its just the hills in my subdivision are kindof steep. To get up them just pedaling reguires using the lowest gears.
Oh well these things weren't meant for mountain climbing anyway,
but if you come across a bigger engine than the ones listed on the BMP site
please let me know. Thanks

I could not get over the train, auto, overpass here while sitting and peddling, I have to stand, lean forward a little and peddle assist with low power until I feel like I can ease off the peddle assist, it's a blast, (for me anyway).
I like going up hills now, also before you get to the hill try going a little faster until your momentum evaporates.

 

[fall_down_stand_up]

New build, I just put a BMP friction drive
with a Monster Scooter engine on it.
I think the engine is the same as
the auger engine from Harbor Freight.
After I got the carb dialed in it runs
pretty good maybe 28-30mph on the flats
but as for hills it doesn't seem to have much torque.
I have a 68.5 HT that seems to have more
bottom end than it does. Can anyone tell me
what's the biggest motor I can get that will
still bolt up to the BMP 78mm clutch drum
besides the GP460 ( I read somewhere that
the 460's bottom end is lacking too).

Were can I buy this monster scooter engine????
John

 

[5-7HEAVEN]

I've used the gp460 on a friction drive and it works great for me, granted I am only 175lbs. It has worked fine with very little problems for me. I do recommend that you get a low-end performance exhaust though, i picked one up on ebay for $35, you will be amazed the difference one of these little pipes make

I've used the GP460 engine on the BMP friction drive. It was a good starter project using the 460. I used a 1.25", then switched to a 1.375" Staton roller. I'm the one said that this engine eats tires. It also has very little torque below its narrow power band. Once the 460 drops its rpms, it REALLY drops speed riding uphill.