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**theguitarfreak** · 01-28-2010, 03:21 PM

Changed my engine oil again yesterday at 2000km. Sticked to mineral oil only. But forgot to change oil filter while changing oil and the local mechanic didnt even remind me

Anyways took it to another mechanic nearby and changed the oil filter but a little quantity of oil came out while the filter was being changed. So now my bike is running with a little less amount of engine oil. Will that affect? The mechanic said it wont be a problem.

**remortr** · 01-28-2010, 10:00 PM

Originally posted by theguitarfreak View Post

Changed my engine oil again yesterday at 2000km. Sticked to mineral oil only. But forgot to change oil filter while changing oil and the local mechanic didnt even remind me

Anyways took it to another mechanic nearby and changed the oil filter but a little quantity of oil came out while the filter was being changed. So now my bike is running with a little less amount of engine oil. Will that affect? The mechanic said it wont be a problem.

thats not a problem, enjoy riding.

**shivank** · 01-28-2010, 10:32 PM

Originally posted by nox2505 View Post

No any speedometer can be called accurate. Reading given by it depends on tyre outside dia, air pressure, ect.
Few factors are as follows:
1. as tyre wears, speedo will show higher reading. 1 mm worn tyre will cover around 6 mm lesser distance in single rotation. in one km, 17" wheel running new 100/90 tyre covers around 520 rotations. which converts to approx 522 rotations on 1mm worn tyre. that gets converted to differance of around 0.6 % between new tyre and 1mm worn tyre. (all this is considering tyre pressure is same

)

Brilliant stuff!

**shivank** · 01-28-2010, 10:37 PM

Originally posted by chicane1879 View Post

That's some serious calculation. Even i have felt it after i changed to a newer rear tyre of my victor.I noticed an increase in top speed!!

The speedo AFAIK is connected to the front..How does the rear affect the top speed then?

No offence Chicane but just a doubt!

**pritish** · 01-28-2010, 10:57 PM

Originally posted by shivank View Post

The speedo AFAIK is connected to the front..How does the rear affect the top speed then?

No offence Chicane but just a doubt!

IMO...the front rolls whn the rear starts rolling...as the power from the engine is transfered to the rear wheel...so if the rolling speed of the rear wheel varies in accordance to the above said factor...thn front wheel gets affected accordingly...and so is the speedo..i hope u get the point.

**shivank** · 01-28-2010, 11:05 PM

Originally posted by pritish View Post

IMO...the front rolls whn the rear starts rolling...as the power from the engine is transfered to the rear wheel...so if the rolling speed of the rear wheel varies in accordance to the above said factor...thn front wheel gets affected accordingly...and so is the speedo..i hope u get the point.

Hahaha..I thought the gearbox is connected to front wheels and the rear one is for balancing and for pillion convenience!..

No,what I exactly meant here is how could the tread of rear affect the change in top speed when the speedo is connected to the front one?

**chicane1879** · 01-28-2010, 11:34 PM

Originally posted by shivank View Post

The speedo AFAIK is connected to the front..How does the rear affect the top speed then?

No offence Chicane but just a doubt!

None taken.

Now, when one switches from a 18'' wheel size to 17'' then it directly alters the gear ratio.Basically it would mean running short geared i.e less speeds at a particular rpm.As a result you would be getting different readings on your speedo as the gearing has been altered.

Short geared:More Acceleration, Less Top Speed(which also implies to speeds achieved in each gear)

Tall Geared:Less Accleration, More Top Speed.

Now in my case there was a change in the tyre profile which isn't much but the difference was apparant and so as the speedo reading.I know i havent described it well.I am in a hurry right now!!

**pritish** · 01-29-2010, 12:24 AM

Originally posted by shivank View Post

Hahaha..I thought the gearbox is connected to front wheels and the rear one is for balancing and for pillion convenience!..

No,what I exactly meant here is how could the tread of rear affect the change in top speed when the speedo is connected to the front one?

funny dude....u urself answered ur doubt....front wheel will rotate if the rear rotates...speed of front wheel will vary accordingly for a different tread pattern of the rear...so top speed will vary accordingly as speedo is connected 2 the front wheel....

...i hope u get it this tym ! ! !

**rennycornelius** · 01-29-2010, 09:37 AM

Originally posted by pritish View Post

funny dude....u urself answered ur doubt....front wheel will rotate if the rear rotates...speed of front wheel will vary accordingly for a different tread pattern of the rear...so top speed will vary accordingly as speedo is connected 2 the front wheel....

...i hope u get it this tym ! ! !

yes, switch the tyre to the slick one and one can feel considerable differece in the acceleration and top speed...
treads eat acceleration and top speed.

**nox2505** · 01-29-2010, 10:19 AM

Originally posted by pritish View Post

Yeah man..i also learned this thing for the first tym...nice one..
for more info refer wikipedia....Speedometer - Wikipedia, the free encyclopedia

@nox2505 one thng i cldnt understand regarding the cable resistance playing a role in it??
cld u explain this thng??

I am not electronics person, but the current transmitted by the wires running from speedo to wheel assembly is very small. If the wires are old, the current carrying capacity drops because of resistance generated because of aging. This will result in drop or rise(depend on electronic circuit logic) in speedo reading displayed.

**pritish** · 01-29-2010, 10:34 AM

Originally posted by nox2505 View Post

I am not electronics person, but the current transmitted by the wires running from speedo to wheel assembly is very small. If the wires are old, the current carrying capacity drops because of resistance generated because of aging. This will result in drop or rise(depend on electronic circuit logic) in speedo reading displayed.

Same here dude...Mechanical Engineer FYI..thats why i had no clue abt that wire resistance part..newazz thanks for the info..i guess its right...

**pritish** · 01-29-2010, 10:36 AM

[QUOTE=rennycornelius;368464]yes, switch the tyre to the slick one and one can feel considerable differece in the acceleration and top speed...
treads eat acceleration and top speed.[/QUOTE]

Yeah..bingo ! ! !

**nox2505** · 01-29-2010, 06:01 PM

Originally posted by pritish View Post

Same here dude...Mechanical Engineer FYI..thats why i had no clue abt that wire resistance part..newazz thanks for the info..i guess its right...

though i am a production engineer, working with some electronics for company projects.

**shivank** · 01-29-2010, 07:17 PM

Hmmm..So many engineers in RTR 180 thread..

If you allow me to go OT for sometime then can we all introduce ourselves? Like what we do..our profession and all!

I am also a mechanical engineer(in making).
It's my 4th sem and we are learning things about clutches and gears (spur and helical)..Professors hardly know anything about this but theory,and when we ask them to clear our doubts, they say-"Beta..It's impossible to see and understand things in 2-D.."

**pritish** · 01-29-2010, 09:34 PM

Originally posted by shivank View Post

Hmmm..So many engineers in RTR 180 thread..

If you allow me to go OT for sometime then can we all introduce ourselves? Like what we do..our profession and all!

I am also a mechanical engineer(in making).
It's my 4th sem and we are learning things about clutches and gears (spur and helical)..Professors hardly know anything about this but theory,and when we ask them to clear our doubts, they say-"Beta..It's impossible to see and understand things in 2-D.."

yeah that will be nice...but as of now lets stay with this thread as proud RTR 180 owners

...

may be we can start a thread of mechanical engineers(M.E)..or M.E owning a RTR 180

....i think the first one will be nice....coz it may turn out to be a pretty good knowledge sharing thread ! ! !

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