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Sprocket Value Computation

charge

Veteran
I am using 12/34 right now. top speed 140kph. It is good for urban riding and winding hill road, but not good for highway.

Pickup is freaking cool and able to reach top speed in about 1/2 km
 

ajanjon

New Member
anyone can help me pls....
i want to change sprocket stock 15/39 to 15/30
but i dont know how about accelerate & top speed

in my calculation if i use 15/30 it will go:

rpm 10000 - 1st gear 67kmh
rpm 10000 - 2nd gear 101kmh
rpm 10000 - 3rd gear 140 kmh
rpm 10000 - 4rd gear 181 kmh

my reference is depend on gear ratio 1st 34/12, 2nd 30/16, 3rd 23/17, 4th 23/22

anybody can give me some suggestion & opinion to change a good combination sprocket.

my bike is T135ES
 

phl6684

Moderator
Staff member
15/30 ????huhu..so small..and so so so so long distance to get that 'dream' 180km/h ++....hehehehee...
 

ajanjon

New Member
Re: Sprocket

hi.....

base on my experience change to 15/37 you will get

1st gear - 45km/h
2nd gear - 80km/h
3rd gear - 120km/h
4th gear - 150km/h at distance 2km (+ - )
 

goldenarmy

New Member
is that enough if we just change different size of sproket, can up the speed.how about the pickup.maybe slow to reach it.or what..
 

iansyah

New Member
A newbie comment...
Here is the rule of thumb..
For the front sprocket : the smaller the teeth you got, the quickly the pickup you gain and vice versa
For the rear sprocket : the smaller the teeth you got, the more top speed you gain and vice versa

So, in terms to get the best of the combination, we need to search inside ourself first. What do we need? Do I need a quick pickup because of the winding road or Do I need the top speed because I ride the bike on the highway mostly?

It is a hard attempt to find the most suitable combination for every situation. Everything is count into calculation. The engine specification, the course, the road layer, the tires, your bodyweight etc etc...

So, one's setup might not fit well for the other..
The conclusion is.. Do research yourself... :)

BTW.. It's a very fast bike if capable of running up to or more than 170 km/h...
My drag bike top speed is 180 km/h (speedo) I believe it's around 162 km/h actual.. It's a RX-King 138 cc stock modified bike (14s class on 402m)
My 1600cc drag car top speed was around 200 km/h or around 180km/h actual speed... It was a Suzuki Baleno 1600cc SOHC for 16s class 402m.
So, I wonder is that a true speedo number or safety number for 170 km/h top speed?
 

hardful

New Member
i think if we use 16/35 when ride at the hill maybe it will slow when go down the hill maybe can reach the top fast (correct me if i were mistaken)
 

hanifrpm

New Member
HELP ME BRO... PLEASEEEE.... REPLY AS SOON AS POSIBLE... :!: :!:
WHAT IS THE BEST COMBINATION SPROCKET FOR MY 135T?????
NOW I USED 15/37 (415), 90/80 FRONT TIRE, 100/80 REAR TIRE AND MY WEIGHT 83KG. I MAKE MOD FOR MY HEAD AND BLOCK, STANDARD CARB. I WANT A FAST TOP SPEED..
1st 50km/j
2nd 120km/j
3rd 140km/j
4rd 160km/j (can go to 180km/j but about 1.5km)

:( :( :(
 
G

goff_d_p35

Guest
try 15f / 41r,

or follow this:

Front teeth | Rear teeth= Gear Ratio

16 39 = 2.44
13 32 = 2.46
15 37 = 2.47
14 35 = 2.5
16 40 = 2.5
15 38 = 2.53
13 33 = 2.54
16 41 = 2.56
14 36 = 2.57

15 39 = 2.6 Stock gear ratio
13 34 = 2.62
16 42 = 2.63
14 37 = 2.64
15 40 = 2.67
16 43 = 2.69
13 35 = 2.69
14 38 = 2.71
15 41 = 2.73
16 44 = 2.75
13 36 = 2.77
14 39 = 2.79
15 42 = 2.8
16 45 = 2.81
13 37 = 2.85
14 40 = 2.86


so if you want more top speed than stock settings
use 14t front and 36t rear
or 16t front and 41t rear


if you want more acceleration
use 13t front and 34t rear
or 16t front and 42t rear


BIGGER TIRES (100/80 and up): use color red
SMALLER TIRES (80/80 and below): use color green
 

naije82

New Member
i using 16/40t (415) tyre 80/90 in front n back... top almost 160km/j..

gof

if i use 16/39.is it ok if i using tyre 90/80 in front n back... :? :?
 
G

goff_d_p35

Guest
no, if your tires are bigger than stock, use the RED color sprocket setting, I know it says it's good for acceleration, but thats what i was recommended for bigger tires.. the green is for smaller tires. But 160klm/h is good. I wouldn't really push it too much. But i would get rid of the 415 chain, it's not all that strong and may snap if your pushing your bike a lot. i would recommend a 428H it's a heavy duty chain, but will last a long time. I still got stock chain and sprockets on my bike for now. I want to upgrade to what Haen is selling.
 
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