50 mph ?? (Down hill doesn't count)

[Easy Rider]

I can say with the help of my buddy Andrew from Kings Sales & Service, I finally hit the 50+ mph mark. My bike was hitting mid forties with a 47 tooth sprocket. Andrew was kind enough to sale me one of his clearance sprockets (Probably the nicest one I've bought so far) a 38 tooth hardened sprocket. It's pretty insane hitting those speeds and flying by cars on the expressway and the look of the peoples faces in the cars are priceless!.
If you do hit these speeds...PLEASE Wear your Full Face Helmet!
For those who haven't seen my bike before, here's what I have:
5.8hp 50cc Morini 2 cycle motor, 6.4 hp ignition and flywheel. Pipelyne tuned pipe, carbon fiber reeds on an aftermarket reed cage and a 38 tooth King's sprocket on a GT LTS frame with the rear suspension locked out.

 

[CMA_Decky]

Damn that's a nice set up. Some day after my hotpocket and cup of noodle filled college days I'll be able to be able to put something like that together. I was thinking though, has anyone ever tried putting one of these engines on a road bike or are they not tough enough.

 

[RClivin]

Easy, What does that morini revv to?

 

[Easy Rider]

I've never put a tach on the bike so if I was to guess, I think it would be somewhere in the 13-14k range. I'm going to look thru the manual this weekend.

 

[ZnsaneRyder]

I really like that 5.8HP bike you got there Easy Rider! It must be SO nice to go that fast with just the lightweight bicycle!

I wish we could ride or race together!

 

[eDJ]

Shiloh0,

Man, I hope you guys who want to go for the land speed records on a bike
will do it on a closed course and not out in traffic.

On one of the TV Channels they show this guy who rides his bicycle down steep mountains in some kind of extreme sport challenge. In one video clip they show he's barreling by and the frame head literally breaks loose from the rest of the bike and he goes to the hospital for some time. If I could video capture it I'd put it on UTube and post it here just so others could see a high speed frame failure. ........and I bet his bike WAS built for the extremes he was using it for too. (not something off the shelf from WalMart)

Fortunately for him he didn't have some big 14 ton FREIGHTLINER'S closing on him as he wasn't on the highway.

So, give some thought to your safety.

 

[saetta]

50 MPH? I am content with reading your results than attempting my own. My top speed is only 31 MPH.

 

[jasonh]

eDJ, are you referring to this one?

YouTube - Downhill bike crash at 100 MPH

Says he was going 100mph. looks like the headset completely ripped off of the frame when he hit a bump.

 

[eDJ]

YES !!! That's the one Jason. Geat job finding it !

About half way thru, that's where you see the frame come unraveled. It hurts everytime I watch it.

It reminds me of what they say about airplane pilots. "there's old pilots & there's bold pilots.....but there's no old-bold pilots". Airplanes have a stall speed, a take off & landing speed, a cruising speed, and a "Don't Exceed speed",
and the pilot who stays within that envelope can usually live to fly another day.

Thanks again Jason.

 

[Norman]

any landing that you can crawl away from is a GOOD landing.
Norman

In that bike wreak the helmet he's wearing isn't for protection but to streamline him to cut through the air better it didn't do a dimes worth of good for him when he bit the bullet. I saw that on the tv he's trying for a down hill land speed record. I'm glad he is doing it so I don't have to.
Norman

 

[Easy Rider]

eDJ, are you referring to this one?

YouTube - Downhill bike crash at 100 MPH

Says he was going 100mph. looks like the headset completely ripped off of the frame when he hit a bump.

OUCH!!!! Stuff like this makes me proud to be a weinnie! I'll never ride again without pads, my helmet and chest protector. I've gone down a few times to know I don't heal as fast as I use too.

 

[eDJ]

When I saw the red outfit on that guy and that helment I figured he was wearing one of those Luge outfits. It seems they said something about
that slope being part of some old volcanic area which gave me another tingle too. That's about the nature of the kind of sand on that slope.

All sand ain't the same. Those who have done some sand casting with metal
know about grades of "sharp sand". I can tell ya, it don't all feel the same on your bare feet..

 

[otis]

i have a grubee 48cc catalyticstyle black pipe already ported but cant reach high rpms what do i do?????????????????????????????? and what does lowering your head do, can i plane,fileand smooth, the ports on the actual head please help !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

[bairdco]

shiloh0 when you suddenly stop posting we will know why

since someone decided to breathe new life into this thread, i noticed that this thread was the last time shiloh0 posted.

 

[otis]

i would love someone to tell me where to see a video of these 40-50mph bikes taking off, no pedaling be theres no take off. or can you get a good palance with hih speeds?

 

[ryan 14]

wait are we talkin downhill or flat, cause today i hit 42 on flat ive gotten up to 47 downhill
but i almost crapped my pants when i saw a copcycle. thank god for disk brakes

 

[Bikeguy Joe]

O.K. ryan, how about some details, like type of speedometer, sprocket size, any mods?

 

[Bikeguy Joe]

Remember, GPS is the only true speedo!

 

[stuartracing]

I really hopped up my first MB build and got some really fast mph out of it but it was scary as all ****......It was a nice TREK mountain bike, good tires,brakes.ect.ect.....But it just felt very dangerous, and I`m a motorcycle drag racer going into the high 7`s and 8. seconds with nitrous....Believe me it was an adrenalin rush for sure.....
Good luck ya speed demons,lol....

 

[Scotchmo]

Remember, GPS is the only true speedo!

Though not a true speedometer, a correctly calibrated digital bicycle speedometer will match a GPS for accuracy.