TOPIC:

Valves fit snuggly in guides.

thats my simple,non scientific valve guide test!

I've participated in a couple of seal changes with the head on.Drill out and modify an old spark plug so you can hook up your air line and thread in with pressure at 100# plus. This will hold the valves open, you 'll need a spring compressor and a flat bar for leverage to depress springs and remove keepers - we used a tire spoon with a bolt running through the handle attached to one of the rocker cover holes. Not easy, not for a novice and it's really a good idea to have 2 people on it.

In reading through this I just can't keeping thinking Oh KZ God Why (W/o Pulling Head)?

In a race where time is everything I get it but first attempt, new to the process, learning curve etc... other then the $50 head gasket replacement costs WHY keeps coming to mind... Not to mention you'll get a better look at the other valve components for inspection/replacements.

Ah well, I guess I'm just getting old....

Old Man Rock wrote: In reading through this I just can't keeping thinking Oh KZ God Why (W/o Pulling Head)?

In a race where time is everything I get it but first attempt, new to the process, learning curve etc... other then the $50 head gasket replacement costs WHY keeps coming to mind... Not to mention you'll get a better look at the other valve components for inspection/replacements.

Ah well, I guess I'm just getting old....

OMR, you are evil. $50 gasket is just the beginning. One look at the valves, etc. and it's "Oh well, I may as well send the head off to be rebuilt." Then it's "well, what the heck, while I'm waiting for the head to be done I may as well have the cylinders honed - no better yet, replace them with a big block." Then "You know, a set of 29mm smoothbores would go nice with the additional displacement and the port job." Then "May as well back cut the tranny while I'm at it. Oh, and maybe a hydraulic dry clutch and air shifter." Then "Wow with all that extra power an extended swingarm and wider wheels and tires make sense." Then "Gotta be able to stop this beast, so 6 piston radial calipers are a must; but they would look better with USD forks." Then "These handlebars and seat look funky on such a performance bike; and how can I run this big engine without an oil cooler and dryblocking?" "Turbo & NOS would really make her pop."

The way I see it, pulling the head will cost at least ten to fifteen grand. It might be cheaper to buy an oil well and let 'er smoke.

Now Ed be nice or I'll have to Photo chop your old ass....

As far as going crazy in $$$$... Well ya ....

I apologize. Maybe just substitute the coil mod for all that other stuff I mentioned.

650ed wrote: I apologize. Maybe just substitute the coil mod for all that other stuff I mentioned.

already did coil mod, first thing i did to bike.

now, in case you havent looked at photos, the head is off the bike, along with jugs and it was found that oil consumption was from 3 damaged oil rings. also the head is in bedroom with me and i have the valves out. just helicoiled 2 camshaft cap holes. after i find or get helicoil for sparkplug hole 1 I will start putting head back together

Old Man Rock wrote: In reading through this I just can't keeping thinking Oh KZ God Why (W/o Pulling Head)? Ah well, I guess I'm just getting old....

You're just getting old, well I've been there for a while now...we did it on dragbike motors where we didn't want to pull the top end apart. Not to save money or being lazy, we just figured out a way to do the seals without disturbing anything else and be done in a couple of hours tops.

As written, race engine/semi recent head rebuild vs. 30 year old engine... sure totally get the concept but if I understood correctly, this post wasn't the case....

Either case, doesn't truly matter for the head has been pulled where he can get to it ideally and learn away and get it all expected and corrected to specifications.

"also the head is in bedroom with me"... Whoa, talk about loving your KZ.....

Old Man Rock wrote:
"also the head is in bedroom with me"... Whoa, talk about loving your KZ.....

it's cool in my room. and we wanted to be comfortable...

anyone here know on the the standard stock piston, what the oil groove size is?