Can I use newer stock cams to boost my 78 kz1000?

How about just a slightly bigger intake cam and leave the exhaust alone.

Almost forgot... Cheaper yet... ~ $20

According to others... COIL MOD, huge power gains... :blink:

larrycavan wrote:

hocbj23 wrote:

Nelson wrote:

Hey kawasakiman do you have the cams these guys are describing? What's a "real" J cam?

81-82 Kawasakis KZ1000 are designated models J (standard),K(LTD), and M(CSR) .Engines on the LTD and CSR are identical except CSR cams are designed for a gear/cable driven tach.LTD and CSR are rated at 92 hp,the J model is 102hp.All three are 998cc.Only difference is cams.So u really need the J bike cams for any improvement.Also kinda hard to locate,but there are lots of K and M cams floating around.I have a set of both K and M cams if u need them .Only difference is the gear boss for the M bikes cable driven tach.bj

BJ,

On a J motor bike like the LTD or CSR, the J cams are a simple swap and no additional sprockets are required. It's really a nice, inexpensive upgrade for those bikes.

On a KZ motor, to use those cams, you either have to modify the stock 3 bolt sprockets to take 2 bolt cams or buy adapting sprockets. Modifying the stock sprockets requires special attention. Allen head bolts must be used. Their heads turned down slightly to clear the cam chain. The sprocket centers need to be resized for the larger boss on the cam & locating the new holes is critical. It's not for the average guy to take on...

J cams are .340" as I recall. Same as an old Andrews 1x cam.

Didnt say they were drop in.He asked what a "J" cam was and I tried to explain.I knew there were mods involved in getting J series parts to work in an earlier head,but so be it.According to my shop manual,the series "J" intake is .366 lift,about same as old Andrews 2x cam,no?I realize Im no expert here but Im trying.bj

hocbj23 wrote:

larrycavan wrote:

hocbj23 wrote:

Nelson wrote:

Hey kawasakiman do you have the cams these guys are describing? What's a "real" J cam?

81-82 Kawasakis KZ1000 are designated models J (standard),K(LTD), and M(CSR) .Engines on the LTD and CSR are identical except CSR cams are designed for a gear/cable driven tach.LTD and CSR are rated at 92 hp,the J model is 102hp.All three are 998cc.Only difference is cams.So u really need the J bike cams for any improvement.Also kinda hard to locate,but there are lots of K and M cams floating around.I have a set of both K and M cams if u need them .Only difference is the gear boss for the M bikes cable driven tach.bj

BJ,

On a J motor bike like the LTD or CSR, the J cams are a simple swap and no additional sprockets are required. It's really a nice, inexpensive upgrade for those bikes.

On a KZ motor, to use those cams, you either have to modify the stock 3 bolt sprockets to take 2 bolt cams or buy adapting sprockets. Modifying the stock sprockets requires special attention. Allen head bolts must be used. Their heads turned down slightly to clear the cam chain. The sprocket centers need to be resized for the larger boss on the cam & locating the new holes is critical. It's not for the average guy to take on...

J cams are .340" as I recall. Same as an old Andrews 1x cam.

Didnt say they were drop in.He asked what a "J" cam was and I tried to explain.I knew there were mods involved in getting J series parts to work in an earlier head,but so be it.According to my shop manual,the series "J" intake is .366 lift,about same as old Andrews 2x cam,no?I realize Im no expert here but Im trying.bj

BJ,

I realize that. I wasn't belittling you or demeaning your effort. I just explained to you about the sprockets and correct lift of a J cam.

Here is a "simulation" of what you would gain.
1015cc
34mm carbs
Stock head (based on the flow numbers on Larry's site)
Sidewinder header (based on my measurements of my own)

2 stock intake cams(current) vs. stock intake and exhaust(last).

These would be crank numbers, not wheel numbers.



Basically you pick up 1 hp peak (yes, one horsepower!), and a little more "overrev".

It's not much. Stock intake cams are cheap though.

Up to you if it's worth the work. I was thinking of doing the same thing in the past.

Larry: I would love to get detailed dimensions and flow charts for stock heads and ported heads, to use for this.

Garbage in = Garbage out, better data is always...um, better.

Let me know if that is something you have and would be willing to share.

Nelson wrote:

hah! yes I did notice the ports were a lot smaller than the carbs. I matched them real nice an smooth-like... and regardless of port sizes, I did feel a very significant improvement in low rpm power over the stockers.

See Dave understands - cheap is the key word here. I enjoy making something from nothing. I'm NOT buying a bunch of expensive performance parts. I just can't justify the expense right now. Just freshening up the stock stuff is pricey enough.

The BS34s were essentially free because I sold the old carbs for the same price... see how I think now? :lol:[/quote
"I did notice a very signifigant boost"

And he never said "BOGS, OH AND THE TERRIBLE FLAT SPOT AT 4GRAND"!

Another kz zooms away into the night, another boat wonders aimless throughout the bay, the rider knowing come morning he will have to hide



He wanders back and forth along the road, whiskey taking effect, his mind rehashes the harsh reality of having been told he's too old to be on the forum.

But now he doesn't have to adhere to forum rules, what a great night he thinks, as he relishes the fact he is once again his own person, and his decisions are purely plummerial.

He reaches into his overalls through the baseball size hole in the chest where his glow in the dark pace maker used to be, neigbor shot him for groping, pulls out the 28mm carb that took the place of his old teddy dave stole when at his house, and gives it passionater kisses than ever before, it's all over, and it's been a good day.

Bs34's, in memory of what was...

Before cattle

Nebr_Rex wrote:

How about just a slightly bigger intake cam and leave the exhaust alone.

what comes in must go out at some point :laugh:

nads.com wrote:

Nelson wrote:

hah! yes I did notice the ports were a lot smaller than the carbs. I matched them real nice an smooth-like... and regardless of port sizes, I did feel a very significant improvement in low rpm power over the stockers.

See Dave understands - cheap is the key word here. I enjoy making something from nothing. I'm NOT buying a bunch of expensive performance parts. I just can't justify the expense right now. Just freshening up the stock stuff is pricey enough.

The BS34s were essentially free because I sold the old carbs for the same price... see how I think now? :lol:[/quote
"I did notice a very signifigant boost"

And he never said "BOGS, OH AND THE TERRIBLE FLAT SPOT AT 4GRAND"!

Another kz zooms away into the night, another boat wonders aimless throughout the bay, the rider knowing come morning he will have to hide



He wanders back and forth along the road, whiskey taking effect, his mind rehashes the harsh reality of having been told he's too old to be on the forum.

But now he doesn't have to adhere to forum rules, what a great night he thinks, as he relishes the fact he is once again his own person, and his decisions are purely plummerial.

He reaches into his overalls through the baseball size hole in the chest where his glow in the dark pace maker used to be, neigbor shot him for groping, pulls out the 28mm carb that took the place of his old teddy dave stole when at his house, and gives it passionater kisses than ever before, it's all over, and it's been a good day.

Bs34's, in memory of what was...

Before cattle

:laugh:heres a flashback for ya nads! :woohoo: have you ever tried flushing a 10 lb of drugs down the toilet when the cops are kicking in the door in the door thinking to yourself damn i wish i had spent that $1.59 at walmart for those little sandwich bags?
thinking to yourself how much easier they would have gone down that itty bitty pipe? :woohoo:

yeah you remember the big raid after the crosby/stills/hash concert in the hotel! :woohoo:

tachrev wrote:

Here is a "simulation" of what you would gain.
1015cc
34mm carbs
Stock head (based on the flow numbers on Larry's site)
Sidewinder header (based on my measurements of my own)

2 stock intake cams(current) vs. stock intake and exhaust(last).

These would be crank numbers, not wheel numbers.

Basically you pick up 1 hp peak (yes, one horsepower!), and a little more "overrev".

It's not much. Stock intake cams are cheap though.

Up to you if it's worth the work. I was thinking of doing the same thing in the past.

Larry: I would love to get detailed dimensions and flow charts for stock heads and ported heads, to use for this.

Garbage in = Garbage out, better data is always...um, better.

Let me know if that is something you have and would be willing to share.

I'm in agreement. A minor increase in power at the loss of the stock tachometer. Just depends on how one looks at things.....

Here's my latest use for GP11 cams. Just finished it

1075 Wiseco 10.5:1 pistons
83 GPz11 cams
93CFM Cavanaugh Head with stock valves
APE Case & cylinder Studs with APE Nuts
Pearson Crank
Stock trans with new friction plates and springs
RS34 Mikunis
New Cam Chain

Guaranteed Fun

Under $4000 total

hey ive got a picture like that on my phone! :laugh:

OK so would DFIGPZ's GPz Cams require mods to fit or not? I'm not understanding that.

Hey Old Man Rock - yes I thought about dropping the gearing, but I really don't want it turning any faster on the freeway. I'm happy with the current gearing.