Hi there!
I got myself a Honda CB125J Italia - I guess its known as CB125S in the US but my Italia comes with a 22mm dellorto carb.
I would like to increase the engine performance and came accross 3 different possibilitys to increase the engine size:
1.) Easy way: i found a complete tuning kit for the cb 125 including cylinder housing + sleeve + 65mm piston + piston rings + piston bolt + sealings. The downside: it costs 300Euro (~390USD), and its the more "boring" way... simple part replacement without learning anything from it.
2.) semi-hard way: Buying 145ccm kit from powroll with sleeve+piston; +machine the housing to fit the sleeve. Downside price+shipping+tool to europe will exceed the price of the "easy way" and thats not worth it.
3.) Hard way and the reason why I opened this thread: Buy a Cb750 piston with 61mm try to get a sleeve somewhere (I actually dont know where), machine the housing to fit the new sleeve...
I am pretty new in messing around with engines and I dont think it is that easy so I have following questions:
- where to find a cb 750 sleeve?
- where can I find the tolerances for machining the cylinder housing? Is there anything I have to take extra care of?
- where do I find the proper sealings for such a big-bore conversion?
- Did anybody actually built in a cb 750 piston? Any experiences?
And last but not least: Do i have to change the head for all three "ways" above? What is happening with the compression ratio?
Thanks in advance for any hints and tipps for a newbe like me.
And please excuse my bad english!
I got myself a Honda CB125J Italia - I guess its known as CB125S in the US but my Italia comes with a 22mm dellorto carb.
I would like to increase the engine performance and came accross 3 different possibilitys to increase the engine size:
1.) Easy way: i found a complete tuning kit for the cb 125 including cylinder housing + sleeve + 65mm piston + piston rings + piston bolt + sealings. The downside: it costs 300Euro (~390USD), and its the more "boring" way... simple part replacement without learning anything from it.
2.) semi-hard way: Buying 145ccm kit from powroll with sleeve+piston; +machine the housing to fit the sleeve. Downside price+shipping+tool to europe will exceed the price of the "easy way" and thats not worth it.
3.) Hard way and the reason why I opened this thread: Buy a Cb750 piston with 61mm try to get a sleeve somewhere (I actually dont know where), machine the housing to fit the new sleeve...
I am pretty new in messing around with engines and I dont think it is that easy so I have following questions:
- where to find a cb 750 sleeve?
- where can I find the tolerances for machining the cylinder housing? Is there anything I have to take extra care of?
- where do I find the proper sealings for such a big-bore conversion?
- Did anybody actually built in a cb 750 piston? Any experiences?
And last but not least: Do i have to change the head for all three "ways" above? What is happening with the compression ratio?
Thanks in advance for any hints and tipps for a newbe like me.
And please excuse my bad english!