hunkofgals

hey guys
ive recently got my honda dio bored
and it was fine till 5000kms after bore and recently it started to give white smoke from silencer when it goes above 60 or when i raise suddenly.

i went to mechanic n he said that the piston rings n the head guide and a valve is gone so i replaced them also
but still the smoke from silencer comes and i am concerned about smoke as i have got it bored and not less than 5k kms were clicked

so what could be the problem guys
please help me out

Noor

Query approved

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Pinaki

It's useless to rebore small bore cylinders like this .. mainly because they don't have accurate machines needed for this kind of work . What's happened to you is the usual course things take after this kind of job .. I see it happen all the time .
You'd do best to buy a new cylinder-piston kit from Honda and have them fit it too ... will save you lots of trouble and money , even now .

hunkofgals

means i have to go to honda people and get a new bore done again ?
.
i think the problem is with silencer
what do u think ?

Pinaki

No not a new bore done ... buy the whole cylinder-piston-rings-gudgeon-pin set .. it comes as a kit .. not too expensive ( relative to my RX135 kit, for example ) . If you have Honda fit it at their service .. they'll guarantee the work for a period of time too .
No , the silencer of a 4-stroke motor cannot belch smoke just like that .. remember that there is supposed to be no oil in the exhaust system .. unlike that was in a 2-stroke motor . Did you get water or oil into the silencer in any way ? White smoke from exhaust is not a big problem per se .. you can continue to run the bike like this . Unless it is accompanied by more serious problems .. like quickly depleting engine-oil level ... poor pickup and fuel mileage etc .

Aneesh@4GHz

+1^^^ Pinaki Sir

Get the stock internals and revert back to stock setup.

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hunkofgals

hmmmm many times water went into the silencer n even oil recently
im worried abt the smoke from the bike thats it

n no change in engine oil level or decrease the mileage
the pick up is very awesome
and the bike is very fine
but only problem is smoke

n its that im feeling pissed asi got a new bore n still smoke exists even after spending much for the bike

Aneesh@4GHz

White smoke is due to burning of engine oil. The piston rings might be causing the smoke, get them inspected again.

Read more: What Would Make White Smoke Come From a Motorcycle Exhaust?

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dual disc 200

New bore & the smoke still exists???

According to my knowledge goes, ur piston rings have not sealed due to an improper run-in & is drinking oil. In short, ur motor is burning oil! Sincere advice is to change the bore kit.

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Pinaki

You've got me confused ... you did a rebore / resleeve of your original cylinder or purchased a new cylinder-piston kit altogether ?
A local rebore/resleeve job is always suspect ( I never seen them get it right even once ) . And it doesn't save you that much money too . In the long run it gets more expensive - as you may find out .
Anyways , if there is no other mentionable problems in the bike , you should know best as you've ridden it all along ... the smoke may well be from extraneous oil/water entered into the silencer pipe somehow . White smoke is not a reason to fret early on .. keep riding the bike .. it should go away with time then . No problem .