Engine Overhaul?

[Idono]

Hi bros,

 

Can help me understand - When a 2nd hand bike shop tells me that they did an "engine overhaul" on the bike, what does it mean really?

[Jehuty]

That means they already replaced the worn parts of the engines, most of the time they are lying.

[epk]

it means they are lying to you.. confirm..

[kisho]

How do we know whether it's really overhauled? i bought mine from ASP serangoon about 14 days ago... and they told me just overhaul and i had to run in for 3000km.

[crazydj]

Don't believe. A few years back i bought my bike, they say that will replace the brake fluid. 1.5 years later, i decided to replace, the brake fluid reservoir so damn rusty and got barely any brake fluid left. Don't tell me 1.5 years the brake fluid can go down by so much and become so rusty...

[Figila]

buying a bike sometimes its just luck.

some people check like mad also...in the end got alot problem....

some nv check til nw no problem.

aniway i wish you good luck,hopefully your bike has no problem.i wana change a new bike,bt feel afraid if i get a "rabak" bike.

just get a trusted mechanic or some hu u trust hu noes bout bikes well to check and replace aniting if needed.

enjoy riding=)

[haoKR]

How do we know whether it's really overhauled? i bought mine from ASP serangoon about 14 days ago... and they told me just overhaul and i had to run in for 3000km.

 

run in lor..

but most of e tym = FAKE

1 of e reason y i dun lyk to get from shop.

another reason is they will sae got warranty. but when u go bak when sumthing is wrong,they will sae wear n tear..

 

wow 3k km..

 

btw,wad bike ?

how much in total ? machine n otr price

[haoKR]

buying a bike sometimes its just luck.

some people check like mad also...in the end got alot problem....

some nv check til nw no problem.

aniway i wish you good luck,hopefully your bike has no problem.i wana change a new bike,bt feel afraid if i get a "rabak" bike.

just get a trusted mechanic or some hu u trust hu noes bout bikes well to check and replace aniting if needed.

enjoy riding=)

 

haha same

my bike coe ending;sep

i wanna get another bike now,but scare gt prob,this n that. 1st hand danm exp aso..

stress..

[Jehuty]

1st hand must check also, ever heard of first hand bike catching on fire? Because it was one of those few defective ones that got through? Anyway safest policy is not to believe, I bought my first bike, they say new piston, I go top servicing at another shop, piston is an old one, with burn marks etc. Anyway, take your time knowing which shop will try to karot you many2 and which won't or at least won't try to go overboard with karotting you.

[bukitmerah]

1st hand must check also, ever heard of first hand bike catching on fire? Because it was one of those few defective ones that got through? Anyway safest policy is not to believe, I bought my first bike, they say new piston, I go top servicing at another shop, piston is an old one, with burn marks etc. Anyway, take your time knowing which shop will try to karot you many2 and which won't or at least won't try to go overboard with karotting you.

 

Nowadays, buy old or new also be prepared to fix things...

 

around 1 ~ 2 weeks ago, i saw a FBF plate shiny NEW spark in a workshop. mechanic told the guy overhaul, show the "jia lat" block & piston to the guy. i dunno if the mechanic is honest or not but the owner said bike broke down after just 10000km, oil got change he claimed...

 

dunno what went wrong...bike defective problem...or mechanic lying...or owner really blur dunno how to take care...i just know nowadays cannot take anything for granted. even brand new doesn't mean you can anyhow bo chap

 

some more nowadays, bike shops / workshops everywhere in singapore all like to carrot people...DON'T TRUST THEM...all same one.

Edited July 15, 2011 by bukitmerah

[kisho]

hmmm. spark. bought it for 3.7k...

[le_stann]

which year .. number plate?

can find out how much they did the bike by comparing with one sold here. More expensive maybe did more stuff. They should anyway but most of the time they gamble that yr bike would be fine and it will run until the 'warranty' is over then some problems will start. (how they know which parts previous owner has changed.. changed recently.. needs changing.. due for change.. answer: only the previous owner will know. so they will only do basic.. ie wash carburetor , tune yr carbs , check wiring , brake fluid , change EO , oil filter , air filter . This is the norm and it already "cost a bomb" about 200 plus 300 for 2B bikes and 300 to 400 for 2A)

 

Do this to see for yourself whether they did up your bike before handing you the keys..

-Get someone in the know, an owner of the bike same model as you who has rode for a few years with the bike test-ride your bike when you take it out from the bike shop. (Engine should be smooth as silk - ENGINE NO PROBLEMS , GOOD TUNING , CARBURETOR WASHED , NEW AIR FILTER)

-If its not , ask them to take out the carburetor and wash it on the spot . If they open up the carb and it is full of rust and water , then you know they did not do up the bike and you better kick up a fuss or they will leave you with it.

 

hmmm. spark. bought it for 3.7k...

How do we know whether it's really overhauled? i bought mine from ASP serangoon about 14 days ago... and they told me just overhaul and i had to run in for 3000km.

[kisho]

ouhhh okay2. tks bro. how do i now for sure if my engine is running good? people say hear the sound you will noe. for me, i can't differntiate eh. haha

[Jehuty]

ouhhh okay2. tks bro. how do i now for sure if my engine is running good? people say hear the sound you will noe. for me, i can't differntiate eh. haha

 

Can move, can clear meter...hahah, eh those are old 2 strokes ah.

[le_stann]

Put it to neutral gear and give it a good rev.. Rmb the sound it makes and the smoothness of the engine as you turn the throttle.. Vroom Vroom, Vrooooooommmmm.. It should be smooth all the way from low rpms to the high rpms and maintain w/o much vibration , loss of power or experience roughness.

 

Hope it helps..

 

ouhhh okay2. tks bro. how do i now for sure if my engine is running good? people say hear the sound you will noe. for me, i can't differntiate eh. haha

[x3Harts]

most bike shop lies, ask one mech bring his tools down open in front of them :> they sure paiseh one haha

[le_stann]

On another note since the topic is on engine overhaul , anyone can help me ?

 

Thinking of doing the engine overhaul myself , bike still ok - milege 97,000km . Time to do it to check for wear and tear . Have the owner's manual and it shows quite clear how to do it but might take a few days to slowly figure , wash and check the parts , get replacements . ( I'm good at DIY !! )

 

Anyone did this before? Also known as top-overhaul?

 

I understand that the mechanic will dismantle everything and inspect the engine for wear and tear and replace parts that need replacement. Replace the gaskets and sealants and put everything back together, check for the piston offset that should be within allowance given by the owner's manual and put back the carburetors . Check them to be in tune . Fix back the tank and seats and ready to go.

 

Is that so?

- do they need to hang the engine? Or do they keep it on the bike only removing the top of the engine.

- is there any cleaning to be done on the insides of the engine? removing of water or fluids , carbon in the interior.

- anything I might have missed?

 

Thanks a lot.

So far haven't done it before so no experience. Asking around first.

[kisho]

Put it to neutral gear and give it a good rev.. Rmb the sound it makes and the smoothness of the engine as you turn the throttle.. Vroom Vroom, Vrooooooommmmm.. It should be smooth all the way from low rpms to the high rpms and maintain w/o much vibration , loss of power or experience roughness.

 

Hope it helps..

 

Oh okay. hmmm. well yea it does sound okay. but sometimes and speeds of 90-100 i feel vibrations in my handlebar. is that normal for my spark cause of itz size?

[le_stann]

I have not rode a spark before so I can't tell you exactly, but for size wise the bike should only experience a bit of swaying in high wind at the AYE-ECP flyover and not so much of vibrations . Slight genuine vibrations will come when you are pushing it pass its cruising speed .

 

Do check however at the carburetor and air filter in due time. As a water and rust filled dirty carburetor and dusty-grimed air filter will have a higher petrol consumption for the same distance traveled at the same speed. These two components can also cause the bike to feel rougher, draggy and have vibrations at cruising speeds. And remember the engine oil as well, you will know in due time how to take care of your baby.

 

Oh okay. hmmm. well yea it does sound okay. but sometimes and speeds of 90-100 i feel vibrations in my handlebar. is that normal for my spark cause of itz size?

[kisho]

oh yes. it's not the raabak2 kind of vibration. so guess it should be okay... Tks for sharing your knowledge man...

[RxzDelux]

How do we know whether it's really overhauled? i bought mine from ASP serangoon about 14 days ago... and they told me just overhaul and i had to run in for 3000km.

 

Hi kisho. Use this as a guideline. From Yamaha also which is your bike manufacturer.

 

http://www.yamaha-motor.com.my/periodicinspection.aspx

 

 

Engine oil Replace every 2000km as stated. Thanks.

[kisho]

Thank you.

[edwinwu91]

ASP cheat people one la. i bought a kr from them. then got a lot of prob then they say got decarb all those. in the end engine easily die off, so much smoke and probs. then i go back to them they say this burnt, that spoilt. I told them that they should check before passing it to me, they say i ride then i know one. they talk **** man, can see from the parts whether is it defect or not sia. they say they overhaul for me, sure talk ****. overhaul so exp, they where will do for us. then they say decarb my pipe alr, but still so much smoke. then i go outside decarb burn then the outside ppl say the pipe belly got hole, i can really feel it man. i go back to them, they say cannot do anything cause i decarb outside dunno whether outside drop or spoilt it to cause the hole. thye are the ones who are a**h** to cause the hole.

[le_stann]

Sigh , another bad exp .

 

Btw how much was the bike and what plate ?

Should have brought over here.

 

ASP cheat people one la. i bought a kr from them. then got a lot of prob then they say got decarb all those. in the end engine easily die off, so much smoke and probs. then i go back to them they say this burnt, that spoilt. I told them that they should check before passing it to me, they say i ride then i know one. they talk **** man, can see from the parts whether is it defect or not sia. they say they overhaul for me, sure talk ****. overhaul so exp, they where will do for us. then they say decarb my pipe alr, but still so much smoke. then i go outside decarb burn then the outside ppl say the pipe belly got hole, i can really feel it man. i go back to them, they say cannot do anything cause i decarb outside dunno whether outside drop or spoilt it to cause the hole. thye are the ones who are a**h** to cause the hole.

[kisho]

ASP cheat people one la. i bought a kr from them. then got a lot of prob then they say got decarb all those. in the end engine easily die off, so much smoke and probs. then i go back to them they say this burnt, that spoilt. I told them that they should check before passing it to me, they say i ride then i know one. they talk **** man, can see from the parts whether is it defect or not sia. they say they overhaul for me, sure talk ****. overhaul so exp, they where will do for us. then they say decarb my pipe alr, but still so much smoke. then i go outside decarb burn then the outside ppl say the pipe belly got hole, i can really feel it man. i go back to them, they say cannot do anything cause i decarb outside dunno whether outside drop or spoilt it to cause the hole. thye are the ones who are a**h** to cause the hole.

 

Sial uhhh... So bad one uh? which branch you bought it from?