two thunder250 go to work.

[double]

here two gs250 from Indonesia where the owners work together in one office. the silver bike is me, the other one officially my boss.lol

http://s3.postimage.org/h5g32610/IMG00327_20110119_1337.jpg (http://postimage.org/image/h5g32610/)

http://s3.postimage.org/h5hqliis/IMG00329_20110119_1339.jpg (http://postimage.org/image/h5hqliis/)

[blaine]

Nice looking rides. :cool: :2tup:

[music man]

Man i wish they made bikes like that here.

[bonehead]

I like the kick start, and the non chrome wheels.

[patrick_777]

Man i wish they made bikes like that here.

It is a little sad that they don't.

[alantf]

I see the silver bike has an oil cooler. It would therefore appear that it's doable on the geezer (as folks have asked before)

But .......... is it necessary (genuine question) or just a gimmick? Or has someone found a way of souping up the engine on this particular bike to make it necessary? :)

[alanmcorcoran]

What's fuel cost in Indonesia? (note: most of us on here are lazy-assed [and metric-challenged] Americans, so please convert liters to gallons and currency to US dollars!)

Happy riding!

[double]

I see the silver bike has an oil cooler. It would therefore appear that it's doable on the geezer (as folks have asked before)

But .......... is it necessary (genuine question) or just a gimmick? Or has someone found a way of souping up the engine on this particular bike to make it necessary? :)

yes it is very helpful installing the full system cooler since the engine is sooo damn hot especially after i bore up to OS 200. before i make the cooler, the heat from engine is extremely high usually when i stuck on a traffic jam and the bike often shutdown from overheating. now after i install it, looks like the heat partially transferred to that cooler.

[double]

What's fuel cost in Indonesia? (note: most of us on here are lazy-assed [and metric-challenged] Americans, so please convert liters to gallons and currency to US dollars!)

Happy riding!

the silver likes to drink Shell here in Indonesia, approximately it takes around 10 liter/week (1 liter = 0.26 gallon). so 2.64 gallons would cost around $8.7 (1 liter = Rp 7850 = $0.87)

and average fuel consumption for the silver takes 1 liter for 25 km or 0.26 gallon for 15 miles.

[Water Warrior 2]

Didn't quite understand the bore out statement. Are you saying you bored out the cylinder ?? How much did you go ? Did you need a new piston ? Any other changes to the engine ? And last but not least..........did you get a good return of power for your efforts ?

[GZBrian]

Great looking rides... GZBrian

[double]

Didn't quite understand the bore out statement. Are you saying you bored out the cylinder ?? How much did you go ? Did you need a new piston ? Any other changes to the engine ? And last but not least..........did you get a good return of power for your efforts ?

yes i bore up the cylinder to OS200 or put in a 74mm piston. but i didnt just go with the OEM cylinder, i replace it with cylinder from diesel engine. why i choose diesel instead of bore from current OEM cylinder? because diesel cylinder is much tolerant to extreme heat and it is more thicker so i can bore it again up to OS400 while if i use OEM standard, the cylinder will very thinner and can crack the engine.

for piston, i use from gasoline engine with the diameter i want with the same pin diameter (18mm). since here we dont have privileged for large diameter motorcycle piston, we use piston from car like camry, mercedes benz, daihatsu zebra. sure with some adjustment. and that's about it, no more changes. up till now, i've used the bore up engine for about a year and truly no problem at all.

the effect on my bike? yes it accelerate much faster, more power torque, but of course the top speed still the same with standard. if i want to exceed it, i have to change the stroke, but i will not do that as there will be lots adjustment and can shorten engine life.

[double]

Great looking rides... GZBrian
thank man! :rawk:

[Water Warrior 2]

Wow, sounds like you did your homework before starting the bigger bore mod. Very impressive.

[double]

Wow, sounds like you did your homework before starting the bigger bore mod. Very impressive.

well learn from friends' experience where most engine blown out or crankcase cracked using OEM cylinder. thank man! :rawk:

[RamAir]

Nice bike and welcome. Is that the GZ motor in that thing or another one?? Also more pics of that cooler would be great buddy thanks!! :D


I posted about an engine cooler idea here viewtopic.php?f=9&t=3943 (http://www.gz250bike.com/forum/viewtopic.php?f=9&t=3943)

And ahve this link to a picture of one that would look to work http://img525.imageshack.us/i/enoilcooler.jpg/ but yours looks like a cleaner set-up.

Like I said any pics and info you got on that cooler would be super great! and got any pics and number specs about your big boring?

[RamAir]

Hold on a sec??

Is that a GZ250 motor??

[blaine]

Hold on a sec??

Is that a GZ250 motor??
That is not a G.Z.250 motor.The stamping on the cover says 850ml of oil.The G.Z. holds 1300mls. :)

[RamAir]

Whats the size of this motor and does it ahve a 6speed????? I mus know for the love of speed! :P

[double]

Whats the size of this motor and does it ahve a 6speed????? I mus know for the love of speed! :P

it's 263cc bro...just a year ago i bore up the 250cc engine, from 72mm to 74mm piston..but it is still 5 speed. to add its power, i put fcr carb.. :rawk:

[double]

Hold on a sec??

Is that a GZ250 motor??
That is not a G.Z.250 motor.The stamping on the cover says 850ml of oil.The G.Z. holds 1300mls. :)

it is a GS250 type bro, and the stamping says 1400ml oil..but after i add oil cooler it needs around 1600ml oil..:D

[double]

Nice bike and welcome. Is that the GZ motor in that thing or another one?? Also more pics of that cooler would be great buddy thanks!! :D


I posted about an engine cooler idea here viewtopic.php?f=9&t=3943 (http://www.gz250bike.com/forum/viewtopic.php?f=9&t=3943)

And ahve this link to a picture of one that would look to work http://img525.imageshack.us/i/enoilcooler.jpg/ but yours looks like a cleaner set-up.

Like I said any pics and info you got on that cooler would be super great! and got any pics and number specs about your big boring?


check my other thread bro..viewtopic.php?f=9&t=3323&start=25 (http://www.gz250bike.com/forum/viewtopic.php?f=9&t=3323&start=25)
there i posted a brief info about the cooler. ..aight man later i get back with some pics. :rawk:

[blaine]

it is a GS250 type bro, and the stamping says 1400ml oil..but after i add oil cooler it needs around 1600ml oil..:D
What is the #850ml I see on the side cover in the picture? :??: :)

[double]

What is the #850ml I see on the side cover in the picture? :??: :)

here's to answer man..
http://s3.postimage.org/1oz1u4o5g/IMG00388_20110212_1118.jpg (http://postimage.org/image/1oz1u4o5g/)

[double]

Nice bike and welcome. Is that the GZ motor in that thing or another one?? Also more pics of that cooler would be great buddy thanks!! :D


I posted about an engine cooler idea here viewtopic.php?f=9&t=3943 (http://www.gz250bike.com/forum/viewtopic.php?f=9&t=3943)

And ahve this link to a picture of one that would look to work http://img525.imageshack.us/i/enoilcooler.jpg/ but yours looks like a cleaner set-up.

Like I said any pics and info you got on that cooler would be super great! and got any pics and number specs about your big boring?

hi bro, check out my oil cooler installment on your post viewtopic.php?f=9&t=3943&start=0 (http://www.gz250bike.com/forum/viewtopic.php?f=9&t=3943&start=0)

[blaine]

What is the #850ml I see on the side cover in the picture? :??: :)

here's to answer man..
http://s3.postimage.org/1oz1u4o5g/IMG00388_20110212_1118.jpg (http://postimage.org/image/1oz1u4o5g/)[/quote

http://img525.imageshack.us/img525/7302/enoilcooler.th.jpg (http://img525.imageshack.us/i/enoilcooler.jpg/)

Uploaded with ImageShack.us (http://imageshack.us)
This is the picture I was talking about.It says 850 ml. :??:

[double]

ooic..hahaha..sorry man...

[alantf]

1400ml stamped on the GZ? I've double checked my European version, & it definitely says 1300ml. (yes, I know it's 1300ml, & 1400ml with filter change) But why are the American & European stampings different? I'd like to know what's stamped on other folks' Geezers. :??:

Edit:- or am I getting confused, & 1400ml is stamped on the foreign bike only?

[RamAir]

Blaine of sorry man we had a missunderstanding. Ya I know the pic I found was not a GZ I just think sending the cooled oil threw the filter and throught the motor then back into a hot 'old pan" (I know its the bottom of the motor and not a pan) would give me better cooling so thats why I posted that pic cuz its the only one I ofund that we could easly convert for our bikes. Although if this guys cooler mod is working tried tested and true then hey Ill go with whats been done and what works!