Daelim roadwin r 125

[iceimmortal]

up until now, i'm still dont understand why sillyporean riders r so dumb struck on fuel saving.

if u understand tat lean bike cause more harm than running ur bike at stoichiometric ratio (14.7:1) air/fuel mix.

if u ride a kup at 40km/l, i understand coz kup is light with small 4-stroke engine n thin wheels.

but any bike tat is larger n heavy should not be able to defy the law of physics.

 

penny save on fuel but dollar waste on damage engine.

 

here the reason why lean engine coz more damage:

1) lean engine runs hot, the leaner the hotter the engine runs.

2) if the bike cooling system is unable to cope with the heat, it's coolant will boil.

3) overheating engine will cook the engine oil, breakdown it's properties thus coz premature wears n more frequent eo changes.

4) plastics, rubbers n gaskets will be hardened due to extreme heat from engine.

5) lean engine does not run at it's potential performance.

6) burnt spark plug or even burnt piston.

etc. there r many more to list.......just think of heat can cause.

 

many newbies always seek out or out do others by boasting their fc r super lower than kup which i find they r heading the wrong way.

 

stock bike is already in lean state, set by the manufacturers to meet euro emission std so tat they can sell their bikes in europe countries. in asia or third countries, no one cares about it, as long as it's cheap to run.

 

many experience riders riding superbike will buy n install power commander on their bikes to retune efi fuel map from stock, but unfortunately small efi bikes do not have gadgets to remap their efi fuel map yet.

 

when anyone weights >70kgs plus pillion claims or boasting their fc is >35km/l on their 125, 150 or 200cc;

first, u will notice their engine runs hot.

second, their engine dont performance (means it's slow).

 

if anyone want to save fuel, there r simple way to do it rather than running lean;

1) do not travel above 60kph.

2) twist the throttle gently when moving off.

3) coast down to a stop.

 

i see.. thanks for the tips and advice.. but i have to agree with the last 2nd paragraph, i'm at least 100kg and riding a RwR true enough the engine gets hot easily and no power (i think it's due to run in period)

[stsoh]

if u need more power, just change rear sprocket to bigger sprocket.

for example,

stock is 42t (t=teeth), use 45t rear sprocket instead.

this will improve on pickup (acceleration) but will down on top speed (means tat with stock 42t rear sprocket u can run top speed of 135kph, but with 45t rear sprocket can run at top speed of 120kph).

 

sprocket ratio = rear sprocket / front sprocket

for stock, 42t/14t=3 (same as 45t/15t=3)

if use 45t, 45t/14t=3.2

 

u can also save fuel coz of lighter load the engine is coping with.

Edited June 19, 2011 by stsoh

[iceimmortal]

if u need more power, just change rear sprocket to bigger sprocket.

for example,

stock is 42t (t=teeth), use 45t rear sprocket instead.

this will improve on pickup (acceleration) but will down on top speed (means tat with stock 42t rear sprocket u can run top speed of 135kph, but with 45t rear sprocket can run at top speed of 120kph).

 

sprocket ratio = rear sprocket / front sprocket

for stock, 42t/14t=3 (same as 45t/15t=3)

if use 45t, 45t/14t=3.2

 

u can also save fuel coz of lighter load the engine is coping with.

 

i see.. ok thanks for the advice.. but i was wondering if i were to like change the sprocket and exhaust.. it will definitely void my 2 years warranty rite?

[stsoh]

changing sprocket does not void warranty.

i believe warranty apply to engine parts only.

u can check with cka or even ask cka to change sprocket for u, they will charge u.

others like tires, battery, brake pads, light bulbs, sprockets, chain, etc r consider as consumables, not under warranty.

 

as for exhaust, best leave it as stock coz after market system r expensive.

also need LTA approval....$$$$ for inspect n certified, if not certify LTA fine is heavy.

Edited June 19, 2011 by stsoh

[fleas]

stsoh i didn' say anything about using lean setting to save fuel :

 

yamaha r125 gets better fuel consumption than rwr because its lighter by about 30kg

 

r125: 130kg+ rwr125: 160kg ~ 180kg

[stsoh]

i'm trying to explain the effects of lean setting either carb or efi, even tot it is done by manufacturer(s).

eg. bajaj, some owner(s) r having problem of overheated engine(s), as many claimed of lowest fc in 2b class.

likewise some phantom owner(s) purposely/intentionally set their carb extremely lean creates overheated engine tat cause engine oil to evaporate n burnt. overheated engine also cause engine to shutdown.

their only hope is when their air-filter get clogged thus get a richer air/fuel mix tat eventually engine will runs cooler.

Edited June 19, 2011 by stsoh

[daveyy]

In singapore, there is no point of getting yamaha r125.. it's just sucking all your petrol.. RwR FC is the best among all sport bikes.. it's more like a transport sport bike..

 

how much is the FC for yr rwr125??

[fleas]

i'm trying to explain the effects of lean setting either carb or efi, even tot it is done by manufacturer(s).

eg. bajaj, some owner(s) r having problem of overheated engine(s), as many claimed of lowest fc in 2b class.

likewise some phantom owner(s) purposely/intentionally set their carb extremely lean creates overheated engine tat cause engine oil to evaporate n burnt. overheated engine also cause engine to shutdown.

their only hope is when their air-filter get clogged thus get a richer air/fuel mix tat eventually engine will runs cooler.

 

i see.

 

but glad u told us that stock was set at lean.

so does this mean that the rwr(E.F.I) is set to lean as well?

 

 

rwr stock fuel consumption roughly 33km/l

[stsoh]

yes, rwR's EFI fuel map is set at lean. in fact, all stock bikes r set at lean state.

 

bike manufacturers maybe setting leaner fuel map in order to be able to sell their bikes in europe countries as euro emission std getting more stringent.

 

http://en.wikipedia.org/wiki/European_emission_standards

[fleas]

:

 

so, have to buy power commander to set the settings or issit possible to just adjust thru laptop?

[stsoh]

power commander(PC) r made for big bikes only......there still no electronic gadget device for small efi bike yet.

[fleas]

alright thanks stsoh

[iceimmortal]

changing sprocket does not void warranty.

i believe warranty apply to engine parts only.

u can check with cka or even ask cka to change sprocket for u, they will charge u.

others like tires, battery, brake pads, light bulbs, sprockets, chain, etc r consider as consumables, not under warranty.

 

as for exhaust, best leave it as stock coz after market system r expensive.

also need LTA approval....$$$$ for inspect n certified, if not certify LTA fine is heavy.

 

i see.. ok i was thinking of changing to ixil carbon fiber exhaust.. thinking whether is it legal anot..

 

how much is the FC for yr rwr125??

 

for me i'm getting about 30km/l i'm like 100 kg.. need to suck more petrol to transport me lols..

Edited June 19, 2011 by iceimmortal

[guiderer]

ice u travel alot on street or expressway?

 

hmm maybe I should change sprocket as per stsoh's recomendation, i dun go touring, only local street/expressway usage, till now, i think acceleration is more important than top speed... (dun really like being tailgate when moving off from traffic light)

[iceimmortal]

ice u travel alot on street or expressway?

 

hmm maybe I should change sprocket as per stsoh's recomendation, i dun go touring, only local street/expressway usage, till now, i think acceleration is more important than top speed... (dun really like being tailgate when moving off from traffic light)

 

both! yes i agree.. acceleration is more impt.. everytime i move off i see the car behind me very shag.. thinking why this guy go so slow.. wan hog the traffic ar? ( the looks from the driver face)

 

i was thinking of maybe changing to 47t instead of 45t.. is it too much or must i use 45t?

Edited June 20, 2011 by iceimmortal

[stsoh]

i think 45t is more suitable for sillypore roads.

try 45t first if still not good then use 47t (i think it's harder to find 47t).

some scramble bikes r using 48t....their top speed down below 100kph but good for trail/mud riding where power is needed.

stunt bikes use bigger rear sprocket like 70~90t (it's special milled for them).

[bloodychamp]

both! yes i agree.. acceleration is more impt.. everytime i move off i see the car behind me very shag.. thinking why this guy go so slow.. wan hog the traffic ar? ( the looks from the driver face)

 

i was thinking of maybe changing to 47t instead of 45t.. is it too much or must i use 45t?

 

i have no problem moving of from a stand still, instate the cars are way behind me.

[guiderer]

roystan ish racer different! hahaha

 

apart from the difference in top speed and acceleration, what other pros n cons are there if i were to change the sproket to 45t?

[fleas]

well, changing sprockets is a give and take thing.

 

to get better acceleration, you will sacrifice some top speed.

 

to get higher top speed, you will sacrifice some acceleration.

[iceimmortal]

hmm.. i think the reason why my bike so slow cos it's still in the run in period ba.. i'll see how after the run in period lo.. if really still slow then i change sprocket liao.. thanks for the advice tho.

[foxin]

Think I saw royston bike at AMK industrial estate.

SOmehow got a feeling..

[bloodychamp]

park 2? block 4002?

[munkit]

seems like we r gonna have 2 more rwr riders with us soon =)

 

sorry. wad is RwR??

[munkit]

there are many ways to run in, for rwr, you can check with roy on how to run in. depends on user too, for me, my bike was already 1 1/2yrs old when i got it. so i cannot provide much infomation. X=

 

bro.. therefore if i get a second hand one.. FBC plate.. i don haf to run in.. but wad if the owner didnt run in?? will it harm the bike??

[guiderer]

rwr is shortform for RoadWin R125..

if it's a 2nd hand bike, you do not have to run in and u cant.

 

run-in occurs when the engine is still new or newly rebuilt, run in is to allow the small parts to fit nicely into place. so u run in a 2nd hand engine = useless, unless you rebuild/overhaul?

 

just my 0.000002cents of my limited knowledge.