cam advice

I have recently rebuilt my top end on my z1.1015 wiesco kit,new guides,seals,had the seats recut,milled head,mild port and polish,BS 34's and was wondering what cams would drop-in or be an upgrade besides.Will J cams be an improvement or gpz cams maybe.I really dont have the extra money right now for a set of aftermarket,hopefully next year.This sight has been an awesome wealth of knowledge.Thanks to all!

Since you do not have a J series motor, those cams or GPZ cams will not work because of the HI-Vo sprockets. The Web-Cam #118 grind is all you can fit into a stock head without relieving it. This would be an enormous improvement over a set of 900 cams. these cams are about equivalent to set of 81/81 GPz cams.



www.webcamshafts.com/index_blank.html?pages/vehicle_search.html

send your current camshafts to WEB-CAM get them "hard faced"

choose the 0.395" lift that is the maximum you want for shim over buckets. plus no extra material removal required until 0.425" The tech people are smart and nice.

395's are drop in power especially with the 34's you have.

setting/or not setting your lobe centers will be the most complicated decision.

but in the hands of an experienced tech you'll be fine

If he has a motor that is a Pre-"J" motor, .395 will not fit in a stock head. If he has a "J" motor than he can go to a#110 grind new cams and save almost $200 over what it costs to have them hardweld and regrind. You can buy the new #110 grind for about $300 and almost $500 for a hardwelded cam. If he has a standard KZ or MKII head than the #118 grind is the max he can fit into a stock head with out modifications and using stock springs.

On the non J KZ head, you have to clearance for a 410 cam. Not sure about the 395.

410s are the largest that you can safely run with shim on top buckets.

We make a roller chain cam sprocket that fits the GPZ 2 bolt cams. This was popular back when they ran Kawasakis in funnybike. They are only available in 32 tooth, so you have to have the big crank pin.

kzzone.com/sprockets.html

Jay

Hold the Phone :laugh:

GPz cams will work. Only the 83-85 GPz11 cams are worth the effort. You have to modify the KZ sprockets to accept 2 bolt cams or see if Jay has some sprockets. And you have to use Allen bolts with slightly turned down heads so they don't touch the chain. Been there..done this...they work real well.


FWIW, I deal with aftermarket cams in KZ motors on a dialy basis. Here's some advice.

Do not take for granted that a camshaft listed as "drop in grind" is actually just a bolt in cam. I've seen .365 lift cams that should never have made it out the door to be shipped. Had a set of 118's that hit the tappet bores on #4 exhaust. Good thing customer didn't just buy them and bolt them in. He shipped them with the head to be ported and I discovered the problem when I was checking the cams. It's rare...but it can happen.

Cam Motion makes an awesome Z1 grind cam for the KZ. Works really well with a ported head in anything from 1015 to 1197cc motors. They're advertised as being ground on 1.100 lobe centers with .400 lift, 247 duration @.050 and a drop in grind. Runs shim on top. A really, really nice street cam that puts the torque in the normal driving RPM range with good top end pull. No waiting around for the cam to get happy about the RPM it's at

In truth, they're not a drop in on every KZ head. They're ground on 1.110 base circles.I have had those cams where they need the exhaust tappet bores clearanced and fit the intakes OK.

I've also had them need to clearancing on both sides. Just depends on the casting.

I've probably seen more KZ castings in my lifetime than most people on this forum. I've seen good ones and poor ones.

Castings vary. Once you approach near .400 lift, you really need to be paying attention.

You can run more lift than .365 in a KZ casting without clearancing the tappet bores if the cam is ground correctly and your casting is a clean one. I've been able to put 110's in KZ heads before without clearancing.

I'm not slamming anyone, just relaying "real world" information that I've personally come up against.

Larry C

my .395 webs i have had to clearance every head they have gone into. which is 5 between drag motors and street motors.

Larry, where is a good source to buy the Cam Motion cams?

I think this poor guy is already confused. i believe he has a stock motor and almost sure he has a stock head. .365 #118 cam is a DROP in cam. I know for a fact that a 78 KZ1000 head will accept a .380 lift with a stock base circle as a drop in. But since the .365 is available off the shelf than I will stick with that advice. Web #118

I don't think Cam Motion makes cams for bikes any more. Unless someone bought the rights to their name with bike cams.

I forgot that Schnitz bought the rights. But they are expensive.

www.schnitzracingstore.com/catalogs/cata...93124&showprevnext=1

Gman wrote:

Larry, where is a good source to buy the Cam Motion cams?

I can get them for you at a good price