Hi.

Today i changed my engine oil with new Shell Advance ( Rs. 300) though from a post i came to know elf was better than shell but anyway i will change it on next 500km.

and yes the engine was consuming too much oil as my mileage was around 40-45 , maximum 50 on a just 100cc bike.

even when today the mech changed my engine oil it was noticed that the quantity of the oil was low. may be only 600-700 ml came out from the engine .

i will check the quantity after 500km.

i am trying my level best to run under 45 but sometimes it is being little hard to maintain under 45 . hoping to keep it down.

Thank you every one. will share if any problem arises.

^^ All the best. Keep an eye on the level through the dipstick. Do update on how the engine is behaving.

Cheers

it is not the speed figure 45 that matters

it is ur engine rpm

u probably dont have a tacho so keep ur engine stress very low

keep a 10 kph limit on every gear

u can go to 45 kph even on 3rd gear but that is not advisable..u will ruin ur engine again

45-50 kph on highest gear(5) is what ur mechanic meant

Ya. it has no tacho so i am sticking to the 10kmph / gear method. usually i ride it twice a day while going to office and coming back. my office is approx 12 km away so in a day total 24 km is covered. what i am doing is riding it very soft and sometimes ( 2-3 times) in a day i am slightly pushing it to 60-65 for just a second and again dropping down to 30-40. i am not continuing at 60s but just touching the speed and coming back.

also planned that riding like this is almost impossible for me for long time so this weekend i have planning for a long drive approx 300km ( maintaining 40-50 speed and will take breaks in the journey in every 20-25 minutes )

Somewhere i got an info that re boring engine increased some top end speed?? how true is that?? and re boring bore also increases the CC .. as my bore may be somewhat increased will there be some change in the top speed??? though its only 94.38cc its top speed was 91.

before boring my engine was 94.38cc
now it may be 98.43 ..


also can i change the main jet of my carburetor ??

as said 0.2-0.3 mm over sized piston was used so that shud be increase in ur cylinder size too

add it to you bore size and calculate the volume using the formula pi x (bore squared) x stroke

cyclinder capacity increases to the top speed will increase a bit
(why a discover 125 is faster than discover 100? bigger engine..same is the concept in ur case)

i dot think u need to up jet but let others answers that...i dunno much abt that

i knw its very hard to resist but please try to maintain speeds between 45-50

otherwise u will again ruin ur engine

occasional out bursts are fine but not too frequent

Yes, engine reboring increases engine displacement (cc) but its nominal in your case. And it 'can' increase your top speed, I said can because cc is not the only factor, overall gearing is also a big factor deciding your top speed.
About re-jetting, ya it can be done, even an up size of 1-2 sizes on the main jet will show performance difference. But I'd advice, ask your mechanic to set its AFR to richer side (tell him to increase its pick up) I think that will be enough, because you now have more cc with tighter clearances, so there will be more heat (new engines do heat up a lot, though you've got only new bore, piston & rings)
about the long running in trip; you can do that too but do make halts of 15-20 mins after riding for 15-20 mins. This is for avoiding overheating. And keep varying your speed within limits.
All the best.

ya i said (0.2-0.3 mm) may be but may be i was wrong.i don't know what was the size of the piston. in my previous engine i was able to hit 92 in a flat road without any physical mod. now when i have ruined my warranty officially and i will be dumping my bike within 6-8 months i would like to use it at the fullest.

can anyone tell me the possible mods like up-jetting ( cost ??? ) , sprocket change ( cost???) and any other which can be effective in this small engine with some effect to drag it to 100kmph. i just want to touch that triple figure in this bike.

Though my hands are itching hardly when i see open roads to test my new top speed but only 100km covered. another 400 to go ...

I have no idea of re-jetting cost. But sprocketing can be a good help. Rear sprockets cost more and mostly comes with chain as a set, on the other hand, front sprocket can be purchased individually & cost is less than 100Rs.
I have over-geared my bike by changing front sprocket from 14T one (stock) to 15T (of unicorn) increment of speed is around 4-5 kmph on a given rpm in top gear.
For more details go to http://www.xbhp.com/talkies/universa...sprockets.html
(I dont have any idea what sprockets you should use) even though, you can try out 1 teeth oversize at front.
Another things for increasing top speed:
-use bigger diameter rear tyre, this will again help in overgearing.
-Use smaller diameter front tyre, this will make speedo to over read speeds (not a true increase in speeds)
-try to hit top speed on a downhill (and of course straight & empty) road.
My advice, ditch top speed attempt, on your current bike (if you want to hit ton mark).
Ride safe. Ride good. Ride economical.
Cheers

Hi. i have almost covered over 400 kms after piston change. The bike is running fine. no problem and no smoke till now.
suddenly today while cleaning my bike i found a small amount of oil on my cylinder base.

Though the amount was small. while cleaning i found the surface little oily.( like a few drops of engine oil was rubbed )

i think is it leaking oil? as i am quite sure that there is no other chance of dropping any oil from any external source.

Please suggest me is it worth worrying? or i can let it go as it is very small in amount?


I am attaching a picture ( NOT OF MY BIKE ENGINE THOUGH) to point where i found the oil drops.

Please suggest. Thnx.

^ Check oil level through dip stick/oil check window if it is going down then it might worth worrying, if its below min mark then get it fixed asap.
Though I dont think you'll encounter any problem as per your explanation (oil quantity found)

My bike just screwed my life. Its horrible. today when i was about to park my bike suddenly my gear stuck. I downshifted to 1st gear but thereafter i could not shift it to neutral. i thought it is normal and i rolled my bike forward and backward which i sometime do to downshift.but nothing happened. no up-shifting and no downshifting. the gear lever was like dead. it was horrible and i had to push the bike to almost 500 mtrs holding clutch to find out a service garage. there they inspected and opened my gearbox and found that my Gear Shaft spring was missing. They were surprised and so was i. they told me that its broken but they could not find the broken spring anywhere near that place. They told me i need to place a spring there and it is very hard to find the spring for my bike model. if discover 100's spring is not found then they will try any other like CT100 / Boxers spring if that fits.

I am totally screwed up. Its damn frustrating.

Now what can't be cured that must be endured. so my queries are:

1. If they are unable to find out the broken spring then it will be in a vulnerable condition as it will be moving within the engine and there will be a massive chance of damaging the engine if that gets stuck in anywhere.

2. If they could not find the right spring then will the other springs will fit?

3. should i change the whole gearshift for a tiny bloody spring. :X

Help.

Arrey yaar it seems your bike is real panauti.. Feel sorry for you bro. But dont worry things will be alright. Point is you need to find where the spring is. It cannot simply vanish. It has to be somewhere there. Are you sure it did nt fall off when the mechanic opened up the case? Regarding the availability of spare spring, I guess you can find similar spring in the open market. So many bikes are there one or the other might fit in. Moreover it should nt be too difficult to source discover spring either.