Best streetable kit and cams

I have a z1 900 with 1015 cylinders, J head. I am going to put a kit and cams and need to know which is better for a daily rider. I'm either going with 1197 or 1260 pistons. My concern is overheating with the 1260. Also which cams would be best. Not drag racing but want to be a beast mid range. Thanx

1197 and 410 cams with 29 carbs

Thanx for the response, I assume ur talking about 29mm smoothbores

smoothbores or crs would work in my opinion anyway.
remember the j series head drops compression 1 1/2-2 numbers so 10.5:1 becomes between 8.5:1-9:1 which i personally consider the perfect compression for a streetable pump gas motor.
combine that with a 900 crank with that nice topend and youll be breaking a lot of sportbike hearts from stoplight to stoplight on 89 octane gas!

1200 or 1260 with 410s is a good choice With the J head you would want J pistons with a spacer plate. We can put together a package for you.

Jay

U ROCK!!!!

Thanks Jay, I think I've been on ur website

Kz luv wrote:

I have a z1 900 with 1015 cylinders, J head. I am going to put a kit and cams and need to know which is better for a daily rider. I'm either going with 1197 or 1260 pistons. My concern is overheating with the 1260. Also which cams would be best. Not drag racing but want to be a beast mid range. Thanx

With J head, if you're going to go 1197 kit with k410 cams, which, by the way will make a nice combo... pay attention here...

If you're leaving the head stock & IF you already have 29's, they'll suffice. They outflow a stock J head by about 15CFM.

If you plan on head work and / or you don't already have 29 smoothbores, then skip the used 29's. Get either RS34, RS36 Mikuni's or CRS33 Keihins.

A correctly street ported J Head should outflow the 29's.

With a 1200cc motor and short duration cams like the K410, the motor will easily handle 33mm round slide or 34 - flat slide carbs and deliver good street behavior.

Don't misunderstand, 29's are a good carb but you have to look at the prices they bring for used vs what you can get brand new vs what you intend to do with the head.

Here's the flow information www.flowbenchtech.com/porting/CRH/kz-data.htm

I have the same setup, but I was told that I wouldn't have a problem with the 1260. I'm tryin to build a KING KONG streetfighter slash daily rider. Any input would be greatly appreciated.