850 group K Hammer kit vs 850 Big bore Blowsion ?

[loictahiti]

Hi Guys
Looking for 850 cc update for my FR2 EVO , what do you think about these two proposition ?
Price, durability, labor and power
Thanks

 

[800750]

I haven't ridden either but my gut would say go with group k for the best all around experience

 

[yamanube]

My gut would say, stick with a 760-780cc ported setup with OEM parts. Unless you are going with an aftermarket cylinder.

 

[800750]

My gut would say, stick with a 760-780cc ported setup with OEM parts. Unless you are going with an aftermarket cylinder.

You clearly take better care of your gut as it has recommended the most sensible solution.Must be all the activia.

 

[loictahiti]

My gut would say, stick with a 760-780cc ported setup with OEM parts. Unless you are going with an aftermarket cylinder.

Aftermarket cylinder is much expensive…..

 

[kevbo]

I have ridden a Group k 850, it ran fine and was reliable. I would use the larger sleeves with a smaller 85mm bore if it was installed in a Superjet or any other longer hull that got a lot of full throttle runs.

 

[waxhead]

Get a ported 760 with compression a decent ignition pipe and you will be way better off