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archie-no2
18th December 2009, 08:07
http://cgi.ebay.co.uk/-GN300-GN250-BIG-BORE-cylinder-Improve-performance_W0QQitemZ280438599111QQcmdZViewItemQQi msxq20091215?IMSfp=TL091215156002r24171

Link to purchase 300cc big bore kits for a gn250. haha
Hiflyer
21st December 2009, 13:09
What a waaaaste, how much extra Hp would you get out of that? 2? haha

Edit - probably should have looked at the link first
avgas
21st December 2009, 13:15
Awesome. But I think bigger can be achieved. Someone should make a GN800 kit
The Pastor
27th December 2009, 11:22
its easier to drop in the gn400 isnt it?
cave weta
27th December 2009, 11:27
Friend of mine was a pizza courier on a CG110 honda years ago- we got him doing an extra 4 deliveries each night by fitting anXR200 motor!:headbang:
Paul in NZ
27th December 2009, 17:48
What a waaaaste, how much extra Hp would you get out of that? 2? haha

Edit - probably should have looked at the link first

Yes- probably...

1 `old GN250 cylinder volume as follows: stroke 61.2MM` Bore 72MM = actual displacement 249cc.

Maximum Power: 15.5KW/8000r/min

Maximum torque: 19.5Nm/5500r/min



2 `new GN300 cylinder volume as follows: stroke 61.2MM` Bore 78MM = actual displacement 298cc

Maximum Power: 19KW/8000r/min

Maximum torque: 23Nm/5500r/min
wbks
27th December 2009, 18:00
That final measurement is at the crank, surely?
huff3r
27th December 2009, 21:07
That final measurement is at the crank, surely?

All factory power measurements are at the crank! So of course it is!! Both those measurements will be at the crank...

Why do people not get this? Factories do not give you RWHP cos it seems like less, its always crank power!!
98tls
27th December 2009, 21:09
All factory power measurements are at the crank! So of course it is!! Both those measurements will be at the crank...

Why do people not get this? Factories do not give you RWHP cos it seems like less, its always crank power!! Same reason they actually believe some of the hp claims from fitting an aftermarket can.:rolleyes:
wbks
27th December 2009, 21:29
All factory power measurements are at the crank! So of course it is!! Both those measurements will be at the crank...

Why do people not get this? Factories do not give you RWHP cos it seems like less, its always crank power!!because it is an kit, not the Suzuki factory, and it's a gn, not a gsxr, so forgive me...
wbks
27th December 2009, 21:29
Same reason they actually believe some of the hp claims from fitting an aftermarket can.:rolleyes:Because they do (sometimes)?......
FROSTY
31st December 2009, 16:11
its easier to drop in the gn400 isnt it?
GN250 12 volt lekkie start
GN400 6 volt kick start
So no not real easy
cheesemethod
1st January 2010, 13:55
Damn that's only $220 plus post with today's exchange rate. Tempted to do it just for a lol, plus the bragging rights of having the fastest slowest bike in the country.

OOOOOHHH - there's also a slotted front brake rotor!