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Malossi MHR TEAM BB 77cc

trueOverrev

Well-Known Member
Malossi BB 77cc Cylinder Kit
MHR TEAM Cranshaft ROD80 PIN12
Malossi Selettra Ignition
VF3 Moto Tassinari Reedvalve --Genuine not Stage6
Malossi Intake Manifold
XSH -DPR - C30 Replica Pipe (80cc)
Polini SS9 Variator
Malossi Rear Pulley System
Delta Clutch 107mm
Malossi Wingbell
Dellorto 26mm Carb


*Crankcase is Heavily Tuned

* Cylinder kit will receive no porting at all, just smoothening of the port areas

* Minarelli Engine mounted on a Beta Ark



With these parts properly installed what HP should i be expecting???
 
you hear that TO? he said more than 20hp, what's important is how that power is delivered, our 70cc is a peaky bastard & the Beta Ark is no lightweight scooter so we need the power of a bigger cc engine, torque is more important in this case & not just hp numbers.

btw it's a PHBL25 carb not a PHBH26.
 
Metrakit prorace exhaust works good on this cylinder. It has a lot of torque and very usefull power but not very much. You must be thinking about 21-22.
 
Tom.#86 said:
I would use a Malossi MHR variator, a 28mm keihin/or replica and another pipe. just a genuine yasuni c21.
Click to expand...

with the current setup it's already very fast as it is, he hasn't topped out his beta ark yet (i did & it was very fast).

it's already got an SS9 Evo vario which works very well, we have a genuine Keihin PWK28 but it will do him no good if he couldn't max out his old engine setup, we also have a Yasuni C21 which is current pipe.

all he wants is more acceleration, it doesn't matter if it sacrifices a bit of top speed in the process.
 
Tom.#86 said:
What about shorter gearing?
Click to expand...

yes we thought about that but his scooter is also being used for long rides & shorter gearing would make the engine rev too high at highway speeds so shorter gearing is out of the question, it's got Malossi 13/44 primary gears mated to the stock secondary gear (10,4:1 RF).

the answer to his needs is more torque in the midrange, this is something easily done with a bigger engine but we don't plan on increasing the stroke as it would be additional work for me so the simplest solution is the BB 77cc, it just needs a minor port work on the carters but other than that a bolt on fit.
 
yes, than that is the best idea. You could test some stuff to get the most torque.
I am also not a great fan of the v-force. Why don't you try a vl14?
 
Tom.#86 said:
yes, than that is the best idea. You could test some stuff to get the most torque.
I am also not a great fan of the v-force. Why don't you try a vl14?
Click to expand...

with VL14 i need a spacer for it to work as the edge of the reedcage is too close to the crankshaft & with the limited space under the ark frame the carb is already very near the frame, with VF3 it doesn't need a spacer & since we are using a smaller 25mm carb i think it's a good match with VF3.

besides the carters are modified with the VF3 in mind so the VL14 will not fit even if i wanted to use it.
 
So we will stick to the PLAN Malossi MHR TEAM BB77cc Indeed.


some videos with Tiba

[ame="http://www.youtube.com/watch?v=edJFj3Rvb9M&feature=related"]YouTube - MHR Beta Ark topspeed run[/ame]


[ame="http://www.youtube.com/watch?v=XDyU_TpCkQU&feature=related"]YouTube - MHR Beta Ark 70cc vs Yamaha Mio 180cc[/ame]
 
Good to see some vids, seems that the setup is perfect as usual, Nice race to the Mio, good to see team power still beating a bike over 2x the displacement!

I have just put my prorace exhaust on my team2, so soon will tell what a difference this exhaust shall make from the c21.
 
trueOverrev said:
EXACTLY WOW 24HP!

So its possible since we have C21 and C30
Click to expand...

hey fafs, when you order the BB77 kit make sure you order a spare piston kit & rings, i think Access Plus doesn't have these kits yet.

btw installing a 2nd radiator is inevitable, Onchie's Beta Ark needed a secondary radiator & what a difference it made to running temperatures, i can actually hold the radiator even after some hard test runs. no more detonation due to high temperatures.
 
Stock making 24hp? Interesting results ! Does anyone know of any dyno results would be great to see where its making most power in comparison to the brother cylinders.
 
U will have 21,23 hp to be exact ^^

You can t expect anything...I know too many noobs who had with Team2 not even 16 HP.
Its a matter of your tuning

Here a dyno run of a Mhr team 2 70ccm STOCK portmap....pro flow tuned carter

http://www.scootertuning.de/gallery/displayimage.php?imageid=70064&original=1

And here another one with an Team2 (says he but ppl said it was 77ccm BB NOT XSH Tuned)

http://www.scootertuning.de/gallery/displayimage.php?imageid=69978&original=1

Therefore,If u have no idea of Tuning u should better buy a Sport cylinder,you will have the same result...High end Tuning is and stays for Pros and not wannabe*s
 
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