Yamaha Jog MHR50 full test run #5

final test run of the day, chnaged the rollers again to heavier ones & it went a bit quicker.

my rider almost crashed right after this run as the nut on the rear axle worked it's way loose.

if it weren't for the pipe the wheel would have come off & crashed, wrecking the scooter.

here's the engine setup

Malossi MHR 50cc LC kit (Overrev Tuned)
Malossi RHQ crank pin 10
Malossi MHR digital inner rotor ignition
Polini 6204 TN9 C4 crank bearings
Malossi VL12 reedvalves
Yasuni C21 replica exhaust pipe
OKO PWK24 carb
KOSO black manifold
Overrev Tuned carters
Malossi MHR2000 Overrange kit
Malossi Delta clutch
Malossi Wing bell
14/34 gear kit

Category:

Autos & Vehicles

Tags:

• Yamaha
• Jog
• MHR
• scooters
• drag
• racing

[slipin808]

wat gear ratio? 10 to 1 or somethin? how do you calcuate it from the amount of teeth?

[2F4R]

it's 8,9:1 gear ratio we are using.

it still got the stock 13/48 primary gear mated to to a 14/34 secondary gear.

to get the final gear ratio you divide the driven gear (the one with a lot of teeth) with the drive gear (the one with less teeth) on both the primary & secondary gears then after you get the ratios on both gears you multiply them & you get the final gear ratio.

48 / 13 = 3.69230769 primary gear ratio

34 / 14 = 2.42857143 secondary gear ratio

hope this helps.

[Jvdx]

hey.

i got a question.

so it goes around 80mph, thats like 125 km/h?

:)

ok anyways, does it make real auto wheelies?

like 10cm or more into the air when sitting up straight , open full gas ?

thanks.

[2F4R]

yes it can do power wheelies if you want, my rider has to keep his weight forward longer just to prevent it from lifting the front tire but even that it still manages to lift it by 2 inches.

i have tuned the clutch to give less bite so he can concentrate on the lights better.

[Jvdx]

ok thanks.

my friend says his brother had a 50cc tuned, and it went 120km/h + powerwheelies.

looks like bullshit to me, but if yours can, maybe his can 2 ;)

thanks.

[2F4R]

no it isn't bullshit especially if you live in Holland, lots of great 2stroke scooter tuners there, i have a couple of Dutch tuners who guided me through the intricacies of 2stroke engines.

i can safely say my engines have a touch of Dutch tuning infused with our Filipino ingenuity.

i am proud to have known a few Dutch tuners that helped me along the way.

hope to hear from you again mijn vriend.

bedankt for the comments & ratings.

[slipin808]

what primary gear is taller? 17/40 or 13/44 i want the most topend. im light so no worry about low end. primary is the one that goes right to the rim right?

[Jvdx]

hehe oke. great.

yea im sure there are some great tuners here, but that guy is totally not a tuner lol.

dont know where he tuned it, maybe a professional tuning company, he hasnt told me yet.

last time i asked him about his exhaust, he said it was a Racing exhaust. he didnt know what brand or anything >.> thats what i want to know. i think hes talking crap lol.

you surely can reach 120 with 50cc tuned, but i just dont think he did it.

anyways great vids.

can u record some auto wheelies?

thanks

[2F4R]

my estimates would be 80mph, not bad for a 50cc scooter huh? :D

btw i'm a long time subscriber, Ron Paul all the way!

[RP4409]

Shit how fast were you going?