Old School Honda C70

[machine k]

Trust me also, its not the engine oil. Not that replacing oil every 2wks is no good, but the oil will turn black in a few hundreds km. It changes colour as it traps oxidised oil, clots and metal engine parts. Honestly speaking, tests out there show that semi-syn EO last >5,000km (or much more) but as marketing ploy, its recommended to change every 3,000km or 3mths.

 

Something else i found about valve breakage...

 

VALVE BREAKAGE

 

Breakage, which is the other main type of valve failure, can happen to either intake or exhaust valves. Valves break in one of two places, where the head is joined to the stem, or where the keeper groove(s) are machined into the end of the stem. Either way, breakage is bad news because the pieces fall into the combustion chamber and wreak havoc on the piston and head.

 

Causes of head breakage include fatigue failure from valve flexing (from off-square seating that causes the stem to flex every time it seats), pounding (from excessive valvelash), stretching (from excessive heat and/or rpm), and thermal shock (sudden temperature changes as when abruptly shutting off a highly loaded engine). With two-piece valves, the junction between the stem and head is where the valve often cracks and separates, not because the valve is defective (though a poor weld could be a factor) but because this area is highly stressed due to the joining of two dissimilar alloys.

 

Breakage at the stem tip can result from excessive sideloading if the installed stem height is not right and causes rocker arm misalignment. It can also be caused by excessive valvelash that prevents the valvetrain from cushioning the valve as it closes. Another condition that may cause the tip of the stem to snap off is wear or scratches in the keeper groove(s) or coil bind (running a cam or rocker arms with too much lift).

[zoobay]

Trust me also, its not the engine oil. Not that replacing oil every 2wks is no good, but the oil will turn black in a few hundreds km. It changes colour as it traps oxidised oil, clots and metal engine parts. Honestly speaking, tests out there show that semi-syn EO last >5,000km (or much more) but as marketing ploy, its recommended to change every 3,000km or 3mths.

 

Something else i found about valve breakage...

 

VALVE BREAKAGE

 

Breakage, which is the other main type of valve failure, can happen to either intake or exhaust valves. Valves break in one of two places, where the head is joined to the stem, or where the keeper groove(s) are machined into the end of the stem. Either way, breakage is bad news because the pieces fall into the combustion chamber and wreak havoc on the piston and head.

 

Causes of head breakage include fatigue failure from valve flexing (from off-square seating that causes the stem to flex every time it seats), pounding (from excessive valvelash), stretching (from excessive heat and/or rpm), and thermal shock (sudden temperature changes as when abruptly shutting off a highly loaded engine). With two-piece valves, the junction between the stem and head is where the valve often cracks and separates, not because the valve is defective (though a poor weld could be a factor) but because this area is highly stressed due to the joining of two dissimilar alloys.

 

Breakage at the stem tip can result from excessive sideloading if the installed stem height is not right and causes rocker arm misalignment. It can also be caused by excessive valvelash that prevents the valvetrain from cushioning the valve as it closes. Another condition that may cause the tip of the stem to snap off is wear or scratches in the keeper groove(s) or coil bind (running a cam or rocker arms with too much lift).

 

did you do a top head overhaul before the this thing occured?

scared misallignment by a mechanic.

this sh*t happens you know

[machine k]

thats why i hoping for kelvin's dinner treat...

=)

now replace head + piston already.

[zoobay]

thats why i hoping for kelvin's dinner treat...

=)

now replace head + piston already.

 

how much you kena for the head and piston?

[machine k]

head 85

Piston 48

Plus some other things also la..

[zoobay]

head 85

Piston 48

Plus some other things also la..

 

Head is $85 ah bro!!! wah!!!

 

oh well .... tot wan to tell you that i got a spare head... but you oredi done up your bike...

 

well i hope your bike is ok and is running...

 

 

 

The meet up yesterday was great man.... played corner and straight road with the guys.... only wasted that we have moved out so late .. if not the adventure would have gone futher!!! oh well there will be other meet ups too...

[kelvin23]

Head is $85 ah bro!!! wah!!!

 

oh well .... tot wan to tell you that i got a spare head... but you oredi done up your bike...

 

well i hope your bike is ok and is running...

 

 

 

The meet up yesterday was great man.... played corner and straight road with the guys.... only wasted that we have moved out so late .. if not the adventure would have gone futher!!! oh well there will be other meet ups too...

 

i juz met tony chan. he was telling me abt the meet & ride last night and how fast ur bike.. hee...

[zoobay]

i juz met tony chan. he was telling me abt the meet & ride last night and how fast ur bike.. hee...

 

hahahahhaha

it was enjoyable lah bro....

 

but my bike wasnt fast lah...

 

he exaggerate lah.... and they were giving me a head start la bro

[ben1112]

Anybody seen my Red pocket rocket?

[ProFatSir]

hahahahhaha

it was enjoyable lah bro....

 

but my bike wasnt fast lah...

 

he exaggerate lah.... and they were giving me a head start la bro

 

its fast loh,i cant even catch up with you.haha:angel:

[readysetgrind]

Anybody seen my Red pocket rocket?

 

last i chatted up with a malay guy who stayed in bpanjang. tt was ard nov last yr.

[kelvin23]

Anybody seen my Red pocket rocket?

 

yes i saw it once @ a bike shop along lavender..

[zoobay]

its fast loh,i cant even catch up with you.haha:angel:

 

dont bedek ah bro...

 

i know you got N02 inside your 2 side box,... you don want to use.....

[ProFatSir]

dont bedek ah bro...

 

i know you got N02 inside your 2 side box,... you don want to use.....

 

dun tell so open lah!

[zoobay]

dun tell so open lah!

 

hahahahahahahahahahahhahaa

[themusicpeople]

hey guys! there is a bike event!

 

Event : Mods May Day 2009

Time : 2 P.M - 6 P.M

Venue : Malay Heritage Centre

Entrance : Free

 

 

I was just wondering if you guys would be interested to go. There will be a whole lot of Vespa's and also other classic bikes. I will be attending the event. Hoping for a good C70 turnout.

 

 

1) themusicpeople

[kelvin23]

hey guys! there is a bike event!

 

Event : Mods May Day 2009

Time : 2 P.M - 6 P.M

Venue : Malay Heritage Centre

Entrance : Free

 

 

I was just wondering if you guys would be interested to go. There will be a whole lot of Vespa's and also other classic bikes. I will be attending the event. Hoping for a good C70 turnout.

 

 

1) themusicpeople

 

i'm planning to go if i can get couple of hours off tmr aftn.. will check back for meet up details.

[themusicpeople]

if u guys going just call me. 9160-9151.

[machine k]

eh zoobay, want to ask u ah, where u get ur chrome rear box n for how much?

Got other colours available?

[mashpotato]

hi guys just wondering if anywhere would care to share a good workshop to do up a complete overhaul for a c70? kinda frustrated through my experience of having unreliable and unprofessional mechanics tell you that certain parts were done up only to have your bike seize up on the highway..can pm me if you not keen to share on this forum,thanks alot in advance!

[ben1112]

Miss my pocket rocket so much. Not much action down here too.. Hopefully i'll be able to save enough to make another dream pocket rocket >3k

[zoobay]

eh zoobay, want to ask u ah, where u get ur chrome rear box n for how much?

Got other colours available?

 

only 1 color , 1 design and 1 size....

 

bought behind AH boy workshop at kallang ave there.

Theres a shop dat caters sidecar... well dats the shop

[zoobay]

hi guys just wondering if anywhere would care to share a good workshop to do up a complete overhaul for a c70? kinda frustrated through my experience of having unreliable and unprofessional mechanics tell you that certain parts were done up only to have your bike seize up on the highway..can pm me if you not keen to share on this forum,thanks alot in advance!

 

well i have frens who done up their up their honda cup at this particular shop located at Northlink Building inbetween sembawang and admiralty.

the name's Sin Boon Motors

 

 

 

can give it a try if you like...

[zoobay]

Miss my pocket rocket so much. Not much action down here too.. Hopefully i'll be able to save enough to make another dream pocket rocket >3k

 

hows your TZR???

ok ah bro.....

[machine k]

only 1 color , 1 design and 1 size....

 

bought behind AH boy workshop at kallang ave there.

Theres a shop dat caters sidecar... well dats the shop

 

how much for the box ah?

=)