TOPIC:

I understand, and I also want nice idle, start and strong mid-range. 95% of time using the bike is within these area... and not full open throtle.

Replace the cams don’t increase power alot alone?

So my next step is to porting the top and then I can replace the cams?

The cams do add power but it moves it up the rpm range. Like I mentioned it's about what you want. Most people think if they add all these performance parts I'll have a bike that behaves like a stock one but with more power. That does not work it's all a compromise do moderate changes and you'll have a nice behaving bike. Start putting in big cams, carbs, porting you end up with a bike that's hard starting, bad idle no midrange with all the power at 3/4 throttle on up.
That's why you should be realistic with yourself about what you want and how your going to ride it before you start building it.

baldy110 wrote: The cams do add power but it moves it up the rpm range. Like I mentioned it's about what you want. Most people think if they add all these performance parts I'll have a bike that behaves like a stock one but with more power. That does not work it's all a compromise do moderate changes and you'll have a nice behaving bike. Start putting in big cams, carbs, porting you end up with a bike that's hard starting, bad idle no midrange with all the power at 3/4 throttle on up.
That's why you should be realistic with yourself about what you want and how your going to ride it before you start building it.

Thank you!

I’m not going todo anything right now, try to learn and collect information and then decide...

Your on the right track. The best bang for the money is more cc and compression both of which you have. I would stick with the stock cams for now go with the VM26. Get the carbs dialed in then ride it for awhile and see how you like it. Go from there.

baldy110 wrote: Your on the right track. The best bang for the money is more cc and compression both of which you have. I would stick with the stock cams for now go with the VM26. Get the carbs dialed in then ride it for awhile and see how you like it. Go from there.

Folow ebay for VM26
It’s not any problem get rebuild kits etc?

From pictures they looks to be quite identical to mine VM24.

Don't bother with rebuild kits their a waste of $$ just get the bowl gaskets and clean everything up really good. Start with 17.5 pilot jets, 117.5 main jets and the needle clip in the middle that will get you pretty close. The VM24 and 26 look a lot alike except the 24 has the ribs on the bodies.

baldy110 wrote: Don't bother with rebuild kits their a waste of $$ just get the bowl gaskets and clean everything up really good. Start with 17.5 pilot jets, 117.5 main jets and the needle clip in the middle that will get you pretty close. The VM24 and 26 look a lot alike except the 24 has the ribs on the bodies.

These will be next winter project I think

It will only give more power on high RPM almost full throtle and full throtle? Or will it improve other things? Throtle respons?

The VM 26 will give you a good boost all over as long as there jetted correctly.

If you have not already google "The Kawasaki GPZ modification FAQ" and take a afternoon someday and go through Zucdaves tread on his 650 drag bike. Could give you a better idea what to expect and things that work and don't. 3 or 4 other 810s on here where you can pick up info on what they have done. Kick myself everyday that I went with the 700cc kit after planning on the 810 or 831 kit more than half my life............

810 kit , cams , ported head and 29mm smoothbores properly tune will give you around 15-20 wheel HP
Stock 650 had around 45 wheel hp so around 60-65